TITLE: GCN CIRCULAR NUMBER: 7147 SUBJECT: GRB 071227: Swift detection of a burst DATE: 07/12/27 20:36:40 GMT FROM: Takanori Sakamoto at NASA/GSFCT. Sakamoto (NASA/UMBC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), M. M. Chester (PSU), S. D. Hunsberger (PSU), K. L. Page (U Leicester), J. L. Racusin (PSU), P. Romano (Univ. Bicocca & INAF-OAB), G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 20:13:47 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071227 (trigger=299787). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 58.120, -55.953 which is RA(J2000) = 03h 52m 29s Dec(J2000) = -55d 57' 08" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed at least three spikes with a duration of about 5 sec. The peak count rate was ~4500 counts/sec (15-350 keV), at ~0.5 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 7138 SUBJECT: GRB 071129: Swift detection of a burst DATE: 07/11/29 00:13:36 GMT FROM: Scott Barthelmy at NASA/GSFCC. Pagani (PSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), F. E. Marshall (NASA/GSFC), J. L. Racusin (PSU), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team: At 00:03:55 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071129 (trigger=297628). Swift did not slew to this burst because of the Sun observing constraint (23deg is less than 45 deg). The BAT on-board calculated location is RA, Dec 220.090, -26.659, which is RA(J2000) = 14h 40m 22s Dec(J2000) = -26d 39' 31" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 30 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~5 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 7121 SUBJECT: GRB 071122: Swift detection of a burst DATE: 07/11/22 01:45:10 GMT FROM: Scott Barthelmy at NASA/GSFCM. Stamatikos (NASA/ORAU), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), P. J. Brown (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC), S. Immler (GSFC/UMCP), J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 01:23:25 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071122 (trigger=297114). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 276.581, +47.063 which is RA(J2000) = 18h 26m 20s Dec(J2000) = +47d 03' 47" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is typical with image triggers, there is nothing obvious in the TDRSS lightcurve. In these cases, the bursts often have long duration.
TITLE: GCN CIRCULAR NUMBER: 7106 SUBJECT: GRB 071118: Swift detection of a burst DATE: 07/11/18 09:29:11 GMT FROM: Jay R. Cummings at NASA/GSFC/SwiftJ. R. Cummings (NASA/UMBC), G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB), S. T. Holland (CRESST/USRA/GSFC), C. B. Markwardt (CRESST/GSFC/UMD), A. Moretti (INAF-OAB), D. M. Palmer (LANL), G. Tagliaferri (INAF-OAB), T. N. Ukwatta (GSFC/GWU) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 08:57:17 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071118 (trigger=296856). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 299.817, +70.093 which is RA(J2000) = 19h 59m 16s Dec(J2000) = +70d 05' 34" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is usual for image triggers, there is no obvious variation in the TDRSS light curve.
TITLE: GCN CIRCULAR NUMBER: 7098 SUBJECT: GRB 071117: Swift detection of a bright burst DATE: 07/11/17 15:02:30 GMT FROM: David Palmer at LANLT. N. Ukwatta (GSFC/GWU), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC), G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB), S. T. Holland (CRESST/USRA/GSFC), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 14:50:06 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071117 (trigger=296805). Swift did not slew immediately to the burst due to an Earth constraint. The BAT on-board calculated location is RA, Dec 335.020, -63.441 which is RA(J2000) = 22h 20m 05s Dec(J2000) = -63d 26' 27" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single FRED peak with a duration of about 5 sec. The peak count rate was ~16000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 7059 SUBJECT: GRB 071112C: Swift detection of a burst with an optical counterpart DATE: 07/11/12 18:50:05 GMT FROM: Scott Barthelmy at NASA/GSFCM. Perri (ASDC), G. Stratta (ASDC), S. D. Barthelmy (GSFC), P. J. Brown (PSU), J. R. Cummings (NASA/UMBC), G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), C. Pagani (PSU), D. M. Palmer (LANL), A. M. Parsons (GSFC), J. L. Racusin (PSU), P. Romano (Univ. Bicocca & INAF-OAB), R. L. C. Starling (U Leicester), T. N. Ukwatta (GSFC/GWU) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 18:32:57 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071112C (trigger=296504). Swift slewed immediately to this burst. The BAT on-board calculated location is RA, Dec 39.220, +28.381 which is RA(J2000) = 02h 36m 53s Dec(J2000) = +28d 22' 50" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). We do not know anything about the lightcurve from this "C" burst, because it came so closely after the previous ("B") burst that the on-board script was still running.
TITLE: GCN CIRCULAR NUMBER: 7058 SUBJECT: GRB 071112B: Swift detection of a short hard burst DATE: 07/11/12 18:34:08 GMT FROM: Scott Barthelmy at NASA/GSFCM. Perri (ASDC), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD), S. Mateos (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), P. Romano (Univ. Bicocca & INAF-OAB), R. L. C. Starling (U Leicester), G. Stratta (ASDC), T. N. Ukwatta (GSFC/GWU), D. E. Vanden Berk (PSU) and S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team: At 18:23:31 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071112B (trigger=296503). Swift did not slew because of the Earth observing constraint. Swift will slew at T+33 min. The BAT on-board calculated location is RA, Dec 260.305, -80.884 which is RA(J2000) = 17h 21m 13s Dec(J2000) = -80d 53' 02" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a double spike structure with a duration of about 1 sec. The peak count rate was ~4500 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 7030 SUBJECT: GRB 071101: Swift detection of a burst DATE: 07/11/01 18:14:24 GMT FROM: Scott Barthelmy at NASA/GSFCS. McBreen (MPE), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), O. Godet (U Leicester), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/UMBC), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU), D. E. Vanden Berk (PSU) and S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team: At 17:53:46 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071101 (trigger=295779). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 48.194, +62.473 which is RA(J2000) = 03h 12m 46s Dec(J2000) = +62d 28' 24" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 3 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~1 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 7020 SUBJECT: GRB 071031: Swift detection of a burst with an optical counterpart DATE: 07/10/31 01:24:38 GMT FROM: David Palmer at LANLM. C. Stroh (PSU), C. Gronwall (PSU), D. Grupe (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), C. Pagani (PSU), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team: At 01:06:36 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071031 (trigger=295670). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 6.458, -58.045 which is RA(J2000) = 00h 25m 50s Dec(J2000) = -58d 02' 42" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peaked structure with a duration of about 30 sec. The peak count rate was ~600 counts/sec (15-350 keV), at ~3 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 7019 SUBJECT: GRB 071028B Swift-BAT detection of a burst DATE: 07/10/30 13:19:51 GMT FROM: Jay R. Cummings at NASA/GSFC/SwiftJ. R. Cummings (CRESST/NASA/GSFC) and J. Greiner (MPE) for the Swift team At 02:43:46 UT on October 28, the Swift Burst Alert Telescope (BAT) triggered on GRB 071028B (trigger #295492). The burst was on the edge of the field of view (4.1% coded) and no source was found automatically onboard. A source was found during later ground analysis at a location RA, Dec 354.163, -31.630 which is RA(J2000) = 23h 36m 39s Dec(J2000) = -31d 37' 47" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two FRED peaks, the first at T+1 sec about 4 seconds long, the second at T+48 sec about 9 seconds long. The peak count rate was about 1500 counts/sec (15-350 keV), at ~1 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 7012 SUBJECT: GRB 071028: Swift detection of a burst DATE: 07/10/28 18:00:32 GMT FROM: Scott Barthelmy at NASA/GSFCJ. L. Racusin (PSU), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), C. Pagani (PSU), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), M. Stamatikos (NASA/ORAU), M. C. Stroh (PSU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team: At 17:41:01 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071028 (trigger=295527). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 119.847, +21.498 which is RA(J2000) = 07h 59m 23s Dec(J2000) = +21d 29' 52" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). Even though this is an image trigger, there is an indication of activity from about T+20 sec to T+50 sec. The peak count rate was ~400 counts/sec (15-350 keV), at ~25 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6986 SUBJECT: GRB 071025: Swift detection of a burst DATE: 07/10/25 04:30:05 GMT FROM: Claudio Pagani at PSU/Swift-XRTC. Pagani (PSU), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), J. L. Racusin (PSU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team: At 04:08:54 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071025 (trigger=295301). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 355.084, +31.757 which is RA(J2000) = 23h 40m 20s Dec(J2000) = +31d 45' 24" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). Although this is a 64 sec image trigger, the light curve appears to have a single broad peak with duration about 120 sec near time T+100, with peak count rate 2000 ct/s.
TITLE: GCN CIRCULAR NUMBER: 6958 SUBJECT: GRB 071021: Swift detection of a burst DATE: 07/10/21 09:56:46 GMT FROM: Scott Barthelmy at NASA/GSFCT. Sakamoto (NASA/UMBC), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB), C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB) and S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team: At 09:41:33 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071021 (trigger=294974). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 340.636, +23.707 which is RA(J2000) = 22h 42m 33s Dec(J2000) = +23d 42' 24" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As with most 64 second image triggers, there is no obvious variation in the count rate light curve.
TITLE: GCN CIRCULAR NUMBER: 6949 SUBJECT: GRB 071020: Swift detection of a bright burst DATE: 07/10/20 07:18:57 GMT FROM: Scott Barthelmy at NASA/GSFCS. T. Holland (CRESST/USRA/GSFC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB), C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (NASA/UMBC), R. L. C. Starling (U Leicester) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 07:02:26 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071020 (trigger=294835). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 119.664, +32.861 which is RA(J2000) = 07h 58m 39s Dec(J2000) = +32d 51' 40" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a double peak structure with a duration of about 5 sec. The peak count rate was ~22000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6932 SUBJECT: GRB 071018?: Swift detection of a possible burst DATE: 07/10/18 09:04:33 GMT FROM: Scott Barthelmy at NASA/GSFCH. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), P. T. O'Brien (U Leicester), D. M. Palmer (LANL) and B. Sbarufatti (INAF-IASFPA) report on behalf of the Swift Team: At 08:37:41 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071018(?) (trigger=294645). The BAT on-board calculated location is RA, Dec 164.676, +53.830 which is RA(J2000) = 10h 58m 42s Dec(J2000) = +53d 49' 49" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). This was a 320-sec long image trigger, so the TDRSS lightcurve does not show any significant signal (as is typical). This location is well off the Galactic plane and does not mach any known sources in SIMBAD. Given that it is a long image trigger, this was automatically classifed as a transient instead of a GRB. We will need the full data set to determine if this is a burst or transient.
TITLE: GCN CIRCULAR NUMBER: 6907 SUBJECT: GRB 071013: Swift detection of a burst DATE: 07/10/13 12:49:52 GMT FROM: Scott Barthelmy at NASA/GSFCF. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), V. La Parola (INAF-IASFPA), V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 12:09:19 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071013 (trigger=294120). Swift did not execute an immediate slew. The BAT on-board calculated location is RA, Dec 279.525, +33.857 which is RA(J2000) = 18h 38m 06s Dec(J2000) = +33d 51' 27" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a peak ~40 sec duration. The peak count rate was ~800 counts/sec (15-350 keV), at ~2 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6882 SUBJECT: GRB 071011: Swift detection of a burst DATE: 07/10/11 12:51:21 GMT FROM: Scott Barthelmy at NASA/GSFCF. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), O. Godet (U Leicester), S. T. Holland (CRESST/USRA/GSFC), V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU), E. Troja (INAF-IASFPA) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 12:40:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071011 (trigger=293924). Swift did not execute an immediate slew because of an Earth-observing constraint, but it will at ~T+2700 sec. The BAT on-board calculated location is RA, Dec 8.400, +61.072 which is RA(J2000) = 00h 33m 36s Dec(J2000) = +61d 04' 21" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two peaks each of ~10 sec duration. The second peak is at ~T+48 sec. The peak count rate was ~1800 counts/sec (15-350 keV), at ~1 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6906 SUBJECT: GRB 071010C Swift-BAT detection of a burst DATE: 07/10/13 02:59:07 GMT FROM: Jay R. Cummings at NASA/GSFC/SwiftJ. R. Cummings (CRESST/NASA/GSFC) for the Swift-BAT team At 22:20:22 UT on October 10, the Swift Burst Alert Telescope (BAT) triggered on GRB 071010C (trigger #293804). The burst was on the edge of the field of view (3.5% coded) and no source was found automatically onboard. A source was found during later ground analysis at a location RA, Dec 338.054, +66.159 which is RA(J2000) = 22h 32m 13s Dec(J2000) = +66d 09' 32" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single slow-rise slow-decay peak about 12 seconds long. The peak count rate was about 1000 counts/sec (15-350 keV), at ~1 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6871 SUBJECT: GRB 071010B: Swift detection of a burst DATE: 07/10/10 21:09:02 GMT FROM: Craig Markwardt at NASA/GSFC/UMDC. B. Markwardt (CRESST/GSFC/UMD), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), V. La Parola (INAF-IASFPA), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), C. Pagani (PSU), P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/UMBC), B. Sbarufatti (INAF-IASFPA) and G. Stratta (ASDC) report on behalf of the Swift Team: At 20:45:47 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071010B (trigger=293795). The BAT on-board calculated location is RA, Dec 150.530, +45.731 which is RA(J2000) = 10h 02m 07s Dec(J2000) = +45d 43' 53" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single FRED pulse with a duration of about 20 sec. The peak count rate was ~12,000 counts/sec (15-350 keV), at ~2 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6859 SUBJECT: GRB 071010: Swift detection of a burst DATE: 07/10/10 03:56:03 GMT FROM: David Palmer at LANLA. Moretti (INAF-OAB), W. H. Baumgartner (GSFC/UMBC), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 03:41:12 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071010 (trigger=293707). The BAT on-board calculated location is RA, Dec 288.101, -32.379 which is RA(J2000) = 19h 12m 24s Dec(J2000) = -32d 22' 42" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a broad structure with a duration of about 30 sec. The peak count rate was ~600 counts/sec (15-350 keV), at ~2 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6856 SUBJECT: GRB 071008: Swift detection of a burst DATE: 07/10/08 22:04:30 GMT FROM: Scott Barthelmy at NASA/GSFCA. Moretti (INAF-OAB), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 21:55:56 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071008 (trigger=293587). The BAT on-board calculated location is RA, Dec 151.548, +44.334 which is RA(J2000) = 10h 06m 11s Dec(J2000) = +44d 20' 02" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 15 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~1 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6858 SUBJECT: GRB 071006 Swift-BAT detection of a burst DATE: 07/10/10 02:18:52 GMT FROM: Jay R. Cummings at NASA/GSFC/SwiftJ. R. Cummings (CRESST/NASA/GSFC) for the Swift-BAT team At 06:41:40 UT on October 6, the Swift Burst Alert Telescope (BAT) triggered on GRB 071006. The burst began just before a preplanned slew, and no source was found automatically onboard. A source was found during later ground analysis, at a location of RA, Dec 335.282, -23.154, which is RA(J2000) = 22h 21m 07s Dec(J2000) = -23d 09' 14" with an uncertainty of 2 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two small peaks on top of a gradual rise to a large peak at T+32 sec. The total duration is about 80 sec. The spectrum appears to be of average hardness for a long GRB.
TITLE: GCN CIRCULAR NUMBER: 6837 SUBJECT: GRB 071003: Swift detection of a bright burst DATE: 07/10/03 07:53:48 GMT FROM: David Palmer at LANLP. Schady (MSSL-UCL), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), G. Sato (GSFC/ISAS) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team: At 07:40:55 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071003 (trigger=292934). The BAT on-board calculated location is RA, Dec 301.856, +10.960 which is RA(J2000) = 20h 07m 25s Dec(J2000) = +10d 57' 35" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 25 sec. The peak count rate was ~16000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6832 SUBJECT: GRB 071001: Swift detection of a burst DATE: 07/10/01 16:54:59 GMT FROM: David Palmer at LANLM. De Pasquale (UCL-MSSL), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), S. Campana (INAF-OAB), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), S. T. Holland (CRESST/USRA/GSFC), H. A. Krimm (GSFC/USRA), V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), A. Moretti (INAF-OAB), C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), J. L. Racusin (PSU), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team: At 16:31:48 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071001 (trigger=292826). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 149.766, -59.751 which is RA(J2000) = 09h 59m 04s Dec(J2000) = -59d 45' 02" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two isolated peaks spanning a duration of about 50 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6818 SUBJECT: GRB 070923: Swift detection of a short hard burst DATE: 07/09/23 19:26:48 GMT FROM: Scott Barthelmy at NASA/GSFCM. C. Stroh (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), D. Grupe (PSU), H. A. Krimm (GSFC/USRA), D. M. Palmer (LANL), A. M. Parsons (GSFC), J. L. Racusin (PSU), R. L. C. Starling (U Leicester) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 19:15:23 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070923 (trigger=292004). The BAT on-board calculated location is RA, Dec 184.626, -38.268 which is RA(J2000) = 12h 18m 30s Dec(J2000) = -38d 16' 03" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single spike with a duration of about 100 msec. The peak count rate was ~8000 counts/sec (15-350 keV), at ~0.0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6808 SUBJECT: GRB 070920B: Swift detection of a burst DATE: 07/09/20 21:13:46 GMT FROM: Scott Barthelmy at NASA/GSFCJ. L. Racusin (PSU), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA), H. A. Krimm (GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team: At 21:04:32 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070920B (trigger=291728). The BAT on-board calculated location is RA, Dec 0.144, -34.819 which is RA(J2000) = 00h 00m 35s Dec(J2000) = -34d 49' 06" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 35 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6805 SUBJECT: GRB 070920: Swift detection of a burst DATE: 07/09/20 04:19:07 GMT FROM: David Palmer at LANLD. Grupe (PSU), N. Gehrels (NASA/GSFC), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL), J. L. Racusin (PSU), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU), M. C. Stroh (PSU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team: At 04:00:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070920 (trigger=291614). The BAT on-board calculated location is RA, Dec 100.932, +72.227 which is RA(J2000) = 06h 43m 44s Dec(J2000) = +72d 13' 38" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is often the case with 64-second image triggers, the BAT light curve shows no obvious variation in the count rate.
TITLE: GCN CIRCULAR NUMBER: 6791 SUBJECT: GRB 070917: Swift detection of a bright burst DATE: 07/09/17 07:48:46 GMT FROM: Jay R. Cummings at NASA/GSFC/SwiftJ. R. Cummings (NASA/UMBC), A. P. Beardmore (U Leicester), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), T. Sakamoto (NASA/ORAU) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift Team: At 07:33:56 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070917 (trigger=291292). The BAT on-board calculated location is RA, Dec 293.925, +2.413 which is RA(J2000) = 19h 35m 42s Dec(J2000) = +02d 24' 47" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a FRED structure with a duration of about 5 sec. The peak count rate was ~22000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6782 SUBJECT: GRB 070913: Swift detection of a burst DATE: 07/09/13 00:46:08 GMT FROM: Scott Barthelmy at NASA/GSFCC. B. Markwardt (CRESST/GSFC/UMD), S. D. Barthelmy (GSFC), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), K. L. Page (U Leicester), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 00:36:43 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070913 (trigger=290843). The BAT on-board calculated location is RA, Dec 228.832, -24.342, which is: RA(J2000) = 15h 15m 20s Dec(J2000) = -24d 20' 30" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 5 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6777 SUBJECT: GRB 070911: Swift detection of a burst DATE: 07/09/11 06:20:20 GMT FROM: David Palmer at LANLH. A. Krimm (GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD), K. L. Page (U Leicester), D. M. Palmer (LANL) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift Team: At 05:57:44 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070911 (trigger=290624). Swift automatic slews are currently disabled, as we are currently recovering from a safehold. The BAT on-board calculated location is RA, Dec 25.799, -33.473 which is RA(J2000) = 01h 43m 12s Dec(J2000) = -33d 28' 21" with an uncertainty of 4 arcmin (radius, 90% containment, including systematic uncertainty, however there is an uncalibrated boresight shift due to operations with a different set of gyros than we have used previously). The BAT light curve showed a complex multi-peaked structure with a duration of about 150 sec. The peak count rate was ~8000 counts/sec (15-350 keV), at ~36 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6743 SUBJECT: GRB 070810B: Swift detection of a short burst DATE: 07/08/10 15:52:16 GMT FROM: David Palmer at LANLF. E. Marshall (NASA/GSFC), P. J. Brown (PSU), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), O. Godet (U Leicester), C. Guidorzi (Univ Bicocca&INAF-OAB), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 15:19:17 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070810B (trigger=287409). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 8.940, +8.835 which is RA(J2000) = 00h 35m 46s Dec(J2000) = +08d 50' 07" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single short spike with a duration of < 0.2 sec. The peak count rate was ~4500 counts/sec (15-350 keV), at ~0 sec after the trigger. The lightcurves in different bands indicate an intermediate spectrum that is neither hard nor soft.
TITLE: GCN CIRCULAR NUMBER: 6733 SUBJECT: GRB 070810: Swift detection of a burst DATE: 07/08/10 02:53:00 GMT FROM: Scott Barthelmy at NASA/GSFCJ. R. Cummings (NASA/UMBC), S. D. Barthelmy (GSFC), M. M. Chester (PSU), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD), D. M. Palmer (LANL) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift Team: At 02:11:52 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070810 (trigger=287364). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 189.939, +10.744 which is RA(J2000) = 12h 39m 45s Dec(J2000) = +10d 44' 40" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peak structure with a duration of about 20 sec. The peak count rate was ~2500 counts/sec (15-350 keV), at T+0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6728 SUBJECT: GRB 070809: Swift detection of a short burst DATE: 07/08/09 19:48:41 GMT FROM: David Palmer at LANLF. E. Marshall (NASA/GSFC), D. N. Burrows (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/ORAU), G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team: At 19:22:17 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070809 (trigger=287344). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 203.782, -22.134 which is RA(J2000) = 13h 35m 08s Dec(J2000) = -22d 08' 01" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peak structure with a duration of about 2 sec. The peak count rate was ~2500 counts/sec (15-350 keV), at ~0 sec after the trigger. It is currently unclear from the spectral data if this is a short hard burst.
TITLE: GCN CIRCULAR NUMBER: 6718 SUBJECT: GRB 070808: Swift detection of a burst DATE: 07/08/08 18:50:12 GMT FROM: Scott Barthelmy at NASA/GSFCJ. R. Cummings (NASA/UMBC), S. D. Barthelmy (GSFC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 18:28:00 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070808 (trigger=287260). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 6.766, +1.166 which is RA(J2000) = 00h 27m 04s Dec(J2000) = +01d 09' 59" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single FRED peak structure with a duration of about 10 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6708 SUBJECT: GRB 070805: Swift detection of a burst DATE: 07/08/05 20:08:02 GMT FROM: Scott Barthelmy at NASA/GSFCA. M. Parsons (GSFC), S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), V. La Parola (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU), D. E. Vanden Berk (PSU), S. D. Vergani (DIAS-DCU) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 19:55:45 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070805 (trigger=287088). The BAT on-board calculated location is RA, Dec 245.043, -59.945 which is RA(J2000) = 16h 20m 10s Dec(J2000) = -59d 56' 40" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two peaks, the first is ~5 sec in duration and the second peak is broader and weaker ending around T+40 sec. The peak count rate was ~500 counts/sec (15-350 keV), at ~2 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6692 SUBJECT: GRB 070802: Swift detection of a burst DATE: 07/08/02 07:46:54 GMT FROM: Scott Barthelmy at NASA/GSFCS. D. Barthelmy (GSFC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), S. Immler (GSFC/UMCP), V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU), G. Tagliaferri (INAF-OAB), D. E. Vanden Berk (PSU) and S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team: At 07:07:25 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070802 (trigger=286809). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 36.851, -55.536 which is RA(J2000) = 02h 27m 24s Dec(J2000) = -55d 32' 10" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a peak with a duration of roughly 30 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~6 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6691 SUBJECT: GRB 070731, Swift-BAT refined analysis DATE: 07/07/31 14:00:59 GMT FROM: Scott Barthelmy at NASA/GSFCJ. Tueller (GSFC), L. Barbier (GSFC), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), P. Romano (INAF/OAB), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), T. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+302 sec from the recent telemetry downlink, we report analysis of BAT GRB 070731 (trigger #286574). The spacecraft did not slew to the location because of a Moon constraint. It will come out of Moon constraint 02 Aug 07 UT. The BAT ground-calculated position is RA, Dec = 328.581, -15.740 deg which is RA(J2000) = 21h 54m 19.5s Dec(J2000) = -15d 44' 23" with an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 49%.
TITLE: GCN CIRCULAR NUMBER: 6678 SUBJECT: GRB 070729: Swift detection of a short hard burst DATE: 07/07/29 00:48:05 GMT FROM: Scott Barthelmy at NASA/GSFCC. Guidorzi (Univ Bicocca&INAF-OAB), L. M. Barbier (NASA/GSFC), S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), A. Moretti (INAF-OAB), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 00:25:53 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070729 (trigger=286373). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 56.322, -39.312 which is RA(J2000) = 03h 45m 17s Dec(J2000) = -39d 18' 41" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows three overlapping peaks with a total duration of about 1.5 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6654 SUBJECT: GRB 070724: Swift detection of a burst DATE: 07/07/24 11:22:00 GMT FROM: Scott Barthelmy at NASA/GSFCH. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), M. De Pasquale (UCL-MSSL), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA), H. A. Krimm (GSFC/USRA), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), P. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA), P. Schady (MSSL-UCL), M. Stamatikos (NASA/ORAU) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team: At 10:53:50 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070724 (trigger=285948). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 27.818, -18.622 which is RA(J2000) = 01h 51m 16s Dec(J2000) = -18d 37' 17" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a strong spike about one second long at T+0 sec. The peak count rate was ~2700 counts/sec (15-350 keV), at ~0 sec after the trigger. This could be a short burst although the spectrum is not hard.
TITLE: GCN CIRCULAR NUMBER: 6640 SUBJECT: GRB 070721B: Swift detection of a burst DATE: 07/07/21 11:16:00 GMT FROM: Scott Barthelmy at NASA/GSFCH. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), P. A. Evans (U Leicester), K. L. Page (U Leicester) and P. Schady (MSSL-UCL) report on behalf of the Swift Team: At 10:33:48 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070721B (trigger=285654). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 33.131, -2.184 (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). Like the previous trigger, there continues be a problem with the messages, so we are not able to say anything about the lightcurve at this time.
TITLE: GCN CIRCULAR NUMBER: 6639 SUBJECT: GRB 070721: Swift detection of a possible burst DATE: 07/07/21 10:59:02 GMT FROM: Scott Barthelmy at NASA/GSFCH. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), P. A. Evans (U Leicester), K. L. Page (U Leicester) and E. Troja (INAF-IASFPA) report on behalf of the Swift Team: At 10:01:08 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070721 (trigger=285653). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 3.176, -28.546 (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). We have very little further information at this time (lightcurve, etc) because there appears to be a problem with the messages.
TITLE: GCN CIRCULAR NUMBER: 6620 SUBJECT: GRB 070714: Swift detection of a bright burst, possibly short DATE: 07/07/14 05:28:15 GMT FROM: Scott Barthelmy at NASA/GSFCJ. L. Racusin (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), M. M. Chester (PSU), N. Gehrels (NASA/GSFC), H. A. Krimm (GSFC/USRA), D. M. Palmer (LANL) and T. Sakamoto (NASA/ORAU) report on behalf of the Swift Team: At 04:59:29 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070714 (trigger=284856). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 57.854, +28.295 which is RA(J2000) = 03h 51m 25s Dec(J2000) = +28d 17' 43" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a duration of 3 seconds with a spike to a peak of 20000 counts/s (15-350 keV) at T+0.2 s.
TITLE: GCN CIRCULAR NUMBER: 6619 SUBJECT: Swift detection of a possible burst (Trigger 284850) DATE: 07/07/14 04:20:07 GMT FROM: Scott Barthelmy at NASA/GSFCD. Grupe (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), M. M. Chester (PSU) and N. Gehrels (NASA/GSFC) report on behalf of the Swift Team: At approximately 03:18 +/-5min UT BAT triggered on a possible GRB (trigger 284850). Swift automatically slewed to the location RA=43.94 Dec=+30.24 (J2000). The uncertainty is 6 arcmin. We are uncertain about both the time and the location at this time because the trigger occurred during a TDRSS outage, so most of the regular TDRSS Notices were lost. We are also in the middle of the computer downtime as announced earlier today, so analysis of the full Malindi downlink data will have to wait until late Saturday UT.
TITLE: GCN CIRCULAR NUMBER: 6594 SUBJECT: GRB 070704: Swift detection of a burst DATE: 07/07/04 20:40:31 GMT FROM: Scott Barthelmy at NASA/GSFCT. Sakamoto (NASA/ORAU), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), M. M. Chester (PSU), N. Gehrels (NASA/GSFC), O. Godet (U Leicester), S. T. Holland (CRESST/GSFC/USRA), S. Immler (GSFC/UMCP), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), D. M. Palmer (LANL), G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team: At 20:05:57 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070704 (trigger=283791). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 354.723, +66.248 which is RA(J2000) = 23h 38m 54s Dec(J2000) = +66d 14' 52" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve does not show anything significant, as is typical for image-trigger events. There is a possibility that the burst started at ~T-70 sec, but since Swift was executing a preplanned slew from ~T-35 to T_0 sec, it is difficult to interpret the TDRSS lightcurve.
TITLE: GCN CIRCULAR NUMBER: 6584 SUBJECT: GRB 070628: Swift detection of a possible burst DATE: 07/06/28 15:01:09 GMT FROM: Scott Barthelmy at NASA/GSFCS. T. Holland (CRESST/GSFC/USRA), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), P. J. Brown (PSU), D. N. Burrows (PSU), S. Campana (INAF-OAB), M. L. Conciatore (ASDC), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), V. La Parola (INAF-IASFPA), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), M. Perri (ASDC), P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/ORAU), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 14:41:02 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070628 (trigger=283320). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 115.284, -20.285 which is RA(J2000) = 07h 41m 08s Dec(J2000) = -20d 17' 04" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak on a rising background while entering the SAA with a duration of about 20 sec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~5 sec after the trigger. Given the galactic latitude of +1.25deg, we can not rule out a Galactic transient origin of this trigger.
TITLE: GCN CIRCULAR NUMBER: 6560 SUBJECT: GRB 070621: Swift detection of a burst DATE: 07/06/21 23:36:31 GMT FROM: Scott Barthelmy at NASA/GSFCB. Sbarufatti (INAF-IASFPA), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), P. J. Brown (PSU), M. M. Chester (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 23:17:39 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070621 (trigger=282808). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 323.804, -24.806 which is RA(J2000) = 21h 35m 13s Dec(J2000) = -24d 48' 20" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows multiple peaks with a total duration of at least 40 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~8 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6560 SUBJECT: GRB 070621: Swift detection of a burst DATE: 07/06/21 23:36:31 GMT FROM: Scott Barthelmy at NASA/GSFCB. Sbarufatti (INAF-IASFPA), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), P. J. Brown (PSU), M. M. Chester (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 23:17:39 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070621 (trigger=282808). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 323.804, -24.806 which is RA(J2000) = 21h 35m 13s Dec(J2000) = -24d 48' 20" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows multiple peaks with a total duration of at least 40 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~8 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6542 SUBJECT: GRB 070616: Swift detection of a burst DATE: 07/06/16 17:02:59 GMT FROM: Scott Barthelmy at NASA/GSFCR. L. C. Starling (U Leicester), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB), J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU), D. E. Vanden Berk (PSU) and L. Vetere (PSU) report on behalf of the Swift Team: At 16:29:33 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070616 (trigger=282445). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 32.155, +56.948 which is RA(J2000) = 02h 08m 37s Dec(J2000) = +56d 56' 53" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows nothing much around T_zero (as is typical for image triggers). We note that there is bright and variable activity in the TDRSS lightcurve starting at T+100 sec and lasting to 600 sec. This may be long-term burst activity, although we can not rule out a contribution from a bright galactic source such as Cyg X-1 coming into the FOV (due to the slew). We will be able to separate this ambiguity when we get the full Malindi data to construct a mask-weighted lightcurve.
TITLE: GCN CIRCULAR NUMBER: 6511 SUBJECT: GRB 070612B: Swift detection of a burst DATE: 07/06/12 06:33:33 GMT FROM: Scott Barthelmy at NASA/GSFCD. Grupe (PSU), S. D. Barthelmy (GSFC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), W. B. Landsman (NASA/GSFC), C. B. Markwardt (CRESST/GSFC/UMD), D. M. Palmer (LANL), J. L. Racusin (PSU), P. Romano (Univ. Bicocca & INAF-OAB) and M. C. Stroh (PSU) report on behalf of the Swift Team: At 06:21:17 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070612B (trigger=282073). The BAT on-board calculated location is RA, Dec 261.713, -8.719 which is RA(J2000) = 17h 26m 51s Dec(J2000) = -08d 43' 06" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showes a single peak with a duration of about 20 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6509 SUBJECT: GRB 070612: Swift detection of a burst DATE: 07/06/12 02:53:27 GMT FROM: Scott Barthelmy at NASA/GSFCD. Grupe (PSU), S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), W. B. Landsman (NASA/GSFC), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), D. C. Morris (PSU), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 02:38:45 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070612 (trigger=282066). The BAT on-board calculated location is RA, Dec 121.385, +37.266 which is RA(J2000) = 08h 05m 32s Dec(J2000) = +37d 15' 56" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single hard- spectrum FRED peak with a duration of about 30 sec. The peak count rate was ~1100 counts/sec (15-350 keV), at ~-1 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6494 SUBJECT: GRB 070611: Swift detection of a burst DATE: 07/06/11 02:08:47 GMT FROM: Scott Barthelmy at NASA/GSFCM. C. Stroh (PSU), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), D. Grupe (PSU), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), W. B. Landsman (NASA/GSFC), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL), A. M. Parsons (GSFC), M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 01:57:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070611 (trigger=282003). The BAT on-board calculated location is RA, Dec 1.987, -29.755 which is RA(J2000) = 00h 07m 57s Dec(J2000) = -29d 45' 18" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 10 sec. The peak count rate was ~800 counts/sec (15-350 keV), at ~2 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6489 SUBJECT: GRB 070610: Swift detection of a burst DATE: 07/06/10 21:03:23 GMT FROM: Scott Barthelmy at NASA/GSFCC. Pagani (PSU), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), D. Grupe (PSU), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), M. Stamatikos (NASA/ORAU) and L. Vetere (PSU) report on behalf of the Swift Team: At 20:52:26 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070610 (trigger=281993). The BAT on-board calculated location is RA, Dec 298.795, +26.214 which is RA(J2000) = 19h 55m 11s Dec(J2000) = +26d 12' 49" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 10 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~3 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6475 SUBJECT: GRB 070531: Swift detection of a burst DATE: 07/05/31 02:30:45 GMT FROM: Scott Barthelmy at NASA/GSFCC. B. Markwardt (GSFC/UMD), L. M. Barbier (NASA/GSFC), S. D. Barthelmy (GSFC), M. M. Chester (PSU), N. Gehrels (NASA/GSFC), S. D. Hunsberger (PSU), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL) and M. Stamatikos (NASA/ORAU) report on behalf of the Swift Team: At 02:10:17 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070531 (trigger=280958). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 6.678, +74.304 which is RA(J2000) = 00h 26m 43s Dec(J2000) = +74d 18' 14" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single FRED-like peak with a duration of about 20 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~2 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6466 SUBJECT: GRB 070529: Swift detection of a burst with an optical aterglow DATE: 07/05/29 13:13:10 GMT FROM: David Palmer at LANLS. T. Holland (CRESST/GSFC/USRA), L. M. Barbier (NASA/GSFC), S. D. Barthelmy (GSFC), P. J. Brown (PSU), S. Campana (INAF-OAB), G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), O. Godet (U Leicester), C. Gronwall (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), H. A. Krimm (GSFC/USRA), V. La Parola (INAF-IASFPA), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA), R. L. C. Starling (U Leicester), G. Tagliaferri (INAF-OAB), E. Troja (INAF-IASFPA), D. E. Vanden Berk (PSU), S. D. Vergani (DIAS-DCU), L. Vetere (PSU) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 12:48:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070529 (trigger=280706). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 283.750, +20.639 which is RA(J2000) = 18h 55m 00s Dec(J2000) = +20d 38' 21" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure at least 40 seconds long. The peak count rate was ~1500 counts/sec (15-350 keV), at ~2 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6431 SUBJECT: GRB 070521: Swift detection of a burst DATE: 07/05/21 07:04:35 GMT FROM: Scott Barthelmy at NASA/GSFCC. Guidorzi (Univ Bicocca&INAF-OAB), S. D. Barthelmy (GSFC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), C. B. Markwardt (GSFC/UMD), A. Moretti (INAF-OAB), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB) and G. Tagliaferri (INAF-OAB) report on behalf of the Swift Team: At 06:51:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070521 (trigger=279935). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 242.669, +30.241 which is RA(J2000) = 16h 10m 41s Dec(J2000) = +30d 14' 27" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows multiple peaks with a duration of about 40 sec. The peak count rate was ~7000 counts/sec (15-350 keV), at ~20 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6425 SUBJECT: GRB 070520B: Swift detection of a burst DATE: 07/05/20 18:14:26 GMT FROM: Scott Barthelmy at NASA/GSFCA. Moretti (INAF-OAB), S. D. Barthelmy (GSFC), M. M. Chester (PSU), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), J. A. Kennea (PSU), V. Mangano (INAF-IASFPA), P. T. O'Brien (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), M. Stamatikos (NASA/ORAU), E. Troja (INAF-IASFPA) and S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team: At 17:44:53 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070520B (trigger=279898). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 121.951, +57.617 which is RA(J2000) = 08h 07m 48s Dec(J2000) = +57d 37' 00" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 5 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~0 sec after the trigger. This burst occurred during a Malindi data downlink session which buffered the initial notices for up to 12 minutes.
TITLE: GCN CIRCULAR NUMBER: 6423 SUBJECT: GRB 070520: Swift detection of a burst DATE: 07/05/20 13:21:43 GMT FROM: Scott Barthelmy at NASA/GSFCP. Romano (Univ. Bicocca & INAF-OAB), S. D. Barthelmy (GSFC), M. M. Chester (PSU), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester) and S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team: At 13:05:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070520 (trigger=279817). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 193.316, +74.993 which is RA(J2000) = 12h 53m 16s Dec(J2000) = +74d 59' 36" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). This is an 88-sec image trigger, and as such the TDRSS lightcurve does not show anything significant above background, as is typical for image triggers.
TITLE: GCN CIRCULAR NUMBER: 6415 SUBJECT: GRB 070518: Swift detection of a burst with optical afterglow DATE: 07/05/18 14:50:19 GMT FROM: David Palmer at LANLC. Guidorzi (Univ Bicocca&INAF-OAB), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), S. Campana (INAF-OAB), M. M. Chester (PSU), G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), F. E. Marshall (NASA/GSFC), A. Moretti (INAF-OAB), P. T. O'Brien (U Leicester), D. M. Palmer (LANL), J. L. Racusin (PSU), P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/ORAU), G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA), D. E. Vanden Berk (PSU) and S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team: At 14:26:21 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070518 (trigger=279592). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 254.223, +55.297 which is RA(J2000) = 16h 56m 54s Dec(J2000) = +55d 17'47" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single (FRED-like) peak with a duration of about 7 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6411 SUBJECT: GRB 070517: Swift detection of a burst DATE: 07/05/17 11:40:57 GMT FROM: Scott Barthelmy at NASA/GSFCS. D. Vergani (DIAS-DCU), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), S. Campana (INAF-OAB), M. M. Chester (PSU), G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), W. B. Landsman (NASA/GSFC), V. Mangano (INAF-IASFPA), A. Moretti (INAF-OAB), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), G. Tagliaferri (INAF-OAB), E. Troja (INAF-IASFPA) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 11:20:58 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070517 (trigger=279494). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 277.579, -62.333 which is RA(J2000) = 18h 30m 19s Dec(J2000) = -62d 19' 56" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two peaks with a duration of about 10 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~1 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6394 SUBJECT: GRB 070509: Swift detection of a burst DATE: 07/05/09 03:17:03 GMT FROM: David Palmer at LANLL. Vetere (PSU), S. D. Barthelmy (GSFC), M. M. Chester (PSU), D. Grupe (PSU), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL), J. L. Racusin (PSU), M. Stamatikos (NASA/ORAU) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 02:48:27 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070509 (trigger=278903). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 237.927, -78.681 which is RA(J2000) = 15h 51m 42s Dec(J2000) = -78d 40' 49" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single FRED-like peak with a duration of about 10 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6383 SUBJECT: GRB 070508: Swift detection of an intense burst with an optical counterpart DATE: 07/05/08 04:47:27 GMT FROM: Scott Barthelmy at NASA/GSFCD. Grupe (PSU), S. D. Barthelmy (GSFC), M. M. Chester (PSU), G. Cusumano (INAF-IASFPA), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL), J. L. Racusin (PSU), M. Stamatikos (NASA/ORAU) and L. Vetere (PSU) report on behalf of the Swift Team: At 04:18:17 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070508 (trigger=278854). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 312.783, -78.368 which is RA(J2000) = 20h 51m 08s Dec(J2000) = -78d 22' 04" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a complex multi-peaked structure with a duration of at least 40 sec. The peak count rate was ~45000 counts/sec (15-350 keV), at ~15 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6375 SUBJECT: GRB 070506: Swift detection of a burst with optical afterglow DATE: 07/05/06 06:05:32 GMT FROM: David Palmer at LANLC. Pagani (PSU), M. M. Chester (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), S. Immler (GSFC/USRA), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), J. L. Racusin (PSU), T. Sakamoto (NASA/ORAU), M. Stamatikos (NASA/ORAU) and L. Vetere (PSU) report on behalf of the Swift Team: At 05:35:58 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070506 (trigger=278693). Swift slewed to the burst immediately after the end of the 64 second image trigger. The BAT on-board calculated location is RA, Dec 347.217, +10.728 which is RA(J2000) = 23h 08m 52s Dec(J2000) = +10d 43' 42" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with a duration of about 6 sec. The peak count rate was ~1700 counts/sec (15-350 keV), at ~6 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6358 SUBJECT: GRB 070429B: Swift detection of a short burst DATE: 07/04/29 03:41:59 GMT FROM: Craig Markwardt at NASA/GSFC/UMDC. B. Markwardt (GSFC/UMD), L. M. Barbier (NASA/GSFC), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), J. K. Cannizzo (NASA/UMBC), M. M. Chester (PSU), N. Gehrels (NASA/GSFC), S. D. Hunsberger (PSU), W. B. Landsman (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), G. Sato (GSFC/ISAS) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team: At 03:09:04 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070429B (trigger=277582). Swift slewed to the burst following a 165 second delay due to the Earth-limb constraint. The BAT on-board calculated location is RA, Dec 328.024, -38.844 which is RA(J2000) = 21h 52m 06s Dec(J2000) = -38d 50' 37" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a short spike with a duration of about 700 msec. The peak count rate was ~3000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6355 SUBJECT: GRB 070429: Swift detection of a burst DATE: 07/04/29 01:51:27 GMT FROM: David Palmer at LANLS. D. Barthelmy (GSFC), C. B. Markwardt (GSFC/UMD), K. L. Page (U Leicester), D. M. Palmer (LANL), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team: At 01:35:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070429 (trigger=277571). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 297.687, -32.388 which is RA(J2000) = 19h 50m 45s Dec(J2000) = -32d 23' 16" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is typical for image trigger GRBs, the BAT light curve shows little obvious variation. A detailed light curve will require the data downlinked via Malindi.
TITLE: GCN CIRCULAR NUMBER: 6352 SUBJECT: GRB 070427: Swift detection of a burst DATE: 07/04/27 08:48:05 GMT FROM: David Palmer at LANLG. Sato (GSFC/ISAS), S. Campana (INAF-OAB), P. A. Evans (U Leicester), C. Guidorzi (Univ Bicocca&INAF-OAB), C. B. Markwardt (GSFC/UMD), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), R. L. C. Starling (U Leicester) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 08:31:08 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070427 (trigger=277356). This burst was too close to the Sun (42 degrees) for Swift to slew to it. The BAT on-board calculated location is RA, Dec 28.862, -27.633 which is RA(J2000) = 01h 55m 27s Dec(J2000) = -27d 37' 57" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multiple-peaked structure with a duration of about 15 sec. The peak count rate was ~3500 counts/sec (15-350 keV), at ~5 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6330 SUBJECT: GRB 070420: Swift detection of a burst with optical afterglow DATE: 07/04/20 06:56:57 GMT FROM: David Palmer at LANLM. Stamatikos (NASA/ORAU), D. N. Burrows (PSU), G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester), C. Gronwall (PSU), V. Mangano (INAF-IASFPA), C. B. Markwardt (GSFC/UMD), P. T. O'Brien (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), M. Perri (ASDC) and G. Stratta (ASDC) report on behalf of the Swift Team: At 06:18:13 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070420 (trigger=276321). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 121.253, -45.561 which is RA(J2000) = 08h 05m 01s Dec(J2000) = -45d 33' 38" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multiply-peaked structure with a duration of at least 70 sec starting at T-50s. The peak count rate was ~4000 counts/sec (15-350 keV), at ~7 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6305 SUBJECT: GRB 070419B: Swift detection of a burst DATE: 07/04/19 11:12:05 GMT FROM: David Burrows at PSU/SwiftA. M. Parsons (GSFC), D. N. Burrows (PSU), M. Capalbi (ASDC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), W. B. Landsman (NASA/GSFC), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), D. M. Palmer (LANL), M. Perri (ASDC), P. Romano (Univ. Bicocca & INAF-OAB), E. Troja (INAF-IASFPA) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 10:44:05 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070419B (trigger=276212). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 315.719, -31.267 which is RA(J2000) = 21h 02m 52s Dec(J2000) = -31d 15' 59" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows multiple peaks, with a duration of about 160 seconds. The peak count rate was ~2500 counts/sec (15-350 keV), at ~0 sec after the trigger. We note that this burst is distinct from GRB 070419A (trigger 276206).
TITLE: GCN CIRCULAR NUMBER: 6302 SUBJECT: GRB 070419: Swift detection of a burst DATE: 07/04/19 10:30:53 GMT FROM: David Palmer at LANLM. Stamatikos (NASA/ORAU), D. N. Burrows (PSU), S. Campana (INAF-OAB), G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), V. La Parola (INAF-IASFPA), W. B. Landsman (NASA/GSFC), V. Mangano (INAF-IASFPA), C. B. Markwardt (GSFC/UMD), P. T. O'Brien (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), P. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA), G. Stratta (ASDC), S. D. Vergani (DIAS-DCU) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 09:59:26 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070419 (trigger=276205). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 182.714, +39.908 which is RA(J2000) = 12h 10m 51s Dec(J2000) = +39d 54' 30" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve suggests emission from T-10 to T+20 with a peak count rate of ~500 counts/sec (15-350 keV), at ~4 sec after the trigger. However, as for most image triggers, the TDRSS light curve data is noisy and we will require the Malindi pass data for a more definitive analysis.
TITLE: GCN CIRCULAR NUMBER: 6273 SUBJECT: GRB 070412: Swift detection of a burst DATE: 07/04/12 01:58:32 GMT FROM: David Palmer at LANLP. Romano (Univ. Bicocca & INAF-OAB), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA), H. A. Krimm (GSFC/USRA), A. Moretti (INAF-OAB), C. Pagani (PSU), D. M. Palmer (LANL), T. Sakamoto (NASA/ORAU), M. Stamatikos (NASA/ORAU) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 01:27:03 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070412 (trigger=275119). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 181.505, +40.101 which is RA(J2000) = 12h 06m 01s Dec(J2000) = +40d 06' 03" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with peaks at approximately 5 and 30 seconds and a total duration of about 40 sec. The peak count rate was ~2400 counts/sec (15-350 keV), at ~5 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6267 SUBJECT: GRB 070411: Swift detection of a burst with optical afterglow DATE: 07/04/11 20:43:42 GMT FROM: Scott Barthelmy at NASA/GSFCA. Moretti (INAF-OAB), S. D. Barthelmy (GSFC), P. J. Brown (PSU), D. N. Burrows (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC), G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), C. Pagani (PSU), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/ORAU), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), G. Tagliaferri (INAF-OAB), D. E. Vanden Berk (PSU), S. D. Vergani (DIAS-DCU) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 20:12:33 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070411 (trigger=275087). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 107.338, +1.083 which is RA(J2000) = 07h 09m 21s Dec(J2000) = +01d 04' 57" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows an initial weak peak starting at T-1 sec and fading by T+5 sec and then a stronger second peak from T+50 to T+90 sec with an amplitude of ~1000 cnts/sec in the 15-350 keV band.
TITLE: GCN CIRCULAR NUMBER: 6247 SUBJECT: GRB 070406: Swift detection of a burst DATE: 07/04/06 21:00:11 GMT FROM: David Palmer at LANLJ. R. Cummings (NASA/UMBC), J. A. Kennea (PSU), W. B. Landsman (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and E. Troja (INAF-IASFPA) report on behalf of the Swift Team: At 00:50:40 UT, BAT triggered and located GRB 070406 (Trigger #274153) as a sub-threshold (6.4 sigma) peak in a 0.256 second image. Subsequent ground analysis optimized the detection to a confident 8.3 sigma, at the location: RA, dec 198.956, +16.529d (J2000), which is RA(J2000) +13h 15m 49s dec(J2000) +16d 31' 46" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The burst is ~0.7 seconds long with a double-peaked profile, with a peak count rate of 1200 counts/s.
TITLE: GCN CIRCULAR NUMBER: 6232 SUBJECT: GRB 070330: Swift detection of a burst DATE: 07/03/30 23:22:06 GMT FROM: Scott Barthelmy at NASA/GSFCD. Grupe (PSU), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), M. M. Chester (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU) and M. C. Stroh (PSU) report on behalf of the Swift Team: At 22:51:31 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070330 (trigger=273180). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 269.519, -63.779 which is RA(J2000) = 17h 58m 05s Dec(J2000) = -63d 46' 44" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 10 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~1 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6224 SUBJECT: GRB 070328: Swift detection of a burst DATE: 07/03/28 04:14:41 GMT FROM: David Palmer at LANLC. B. Markwardt (GSFC/UMD), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and E. Troja (INAF-IASFPA) report on behalf of the Swift Team: At 03:53:53 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070328 (trigger=272773). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 65.117, -34.069 which is RA(J2000) = 04h 20m 28s Dec(J2000) = -34d 04' 07" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 70 sec. The peak count rate was ~8000 counts/sec (15-350 keV), at ~3 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6653 SUBJECT: GRB 070326: Detection of first burst from BAT Slew Survey (BATSS) DATE: 07/07/22 21:59:33 GMT FROM: Antonio Copete at Harvard UA. Copete, J. Grindlay, and J. Hong (Harvard), S. Barthelmy and N. Gehrels (NASA/GSFC) We report on the first GRB found solely from imaging using BAT slew data, from a test run carried out in March 2007 of what will become the BAT Slew Survey (BATSS; Grindlay, astro-ph# 0704.3294). A 58sec-long slew which began on 2007-03-26 16:29:10 UT, from a prior SAA passage onto Swift observation number 00271019007, included a burst (hereafter referred to as GRB 070326) detected independently at 8.9 sigma and 6.9 sigma in the 15-50keV and 50-150keV energy bands, respectively. The GRB T0 occurred 2 sec after the start of the slew. The averaged position of the burst was found to be: RA(J2000) = 2h 41m 20.8s Dec(J2000) = -66d 59' 21" with an uncertainty radius of 3.9 arcmin (99% confidence). The time-averaged coding fraction at the burst location was 65% and the exposure time was 58.0 sec.
TITLE: GCN CIRCULAR NUMBER: 6210 SUBJECT: GRB 070318: Swift detection of a burst with an optical afterglow DATE: 07/03/18 07:49:43 GMT FROM: Scott Barthelmy at NASA/GSFCJ. R. Cummings (NASA/UMBC), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), V. La Parola (INAF-IASFPA), T. Mineo (INAF-IASFPA) and D. M. Palmer (LANL) report on behalf of the Swift Team: At 07:28:56 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070318 (trigger=271019). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 48.540, -42.962 which is RA(J2000) = 03h 14m 10s Dec(J2000) = -42d 57' 42" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single FRED-like peak with a duration of about 70 sec. The peak count rate was ~4000 counts/sec (15-350 keV), at ~2 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6169 SUBJECT: GRB 070306: Swift detection of a burst DATE: 07/03/06 17:04:20 GMT FROM: Scott Barthelmy at NASA/GSFCS. B. Pandey (UCL-MSSL), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC), M. De Pasquale (UCL-MSSL), N. Gehrels (NASA/GSFC), O. Godet (U Leicester), S. T. Holland (CRESST/GSFC/USRA), S. Immler (GSFC/USRA), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), V. Mangano (INAF-IASFPA), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), A. Moretti (INAF-OAB), C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (NASA/ORAU), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU), E. Troja (INAF-IASFPA) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 16:41:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070306 (trigger=263361). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 148.082, +10.471 which is RA(J2000) = 09h 52m 20s Dec(J2000) = +10d 28' 17" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). We did not receive a BAT lightcurve down TDRSS so we can not say anything about its shape. However, this 12 second trigger does have a strong image significance, and as such, the reliability is high.
TITLE: GCN CIRCULAR NUMBER: 6156 SUBJECT: GRB 070227: Swift detection of a burst in ground analysis DATE: 07/02/28 06:42:44 GMT FROM: Claudio Pagani at PSU/Swift-XRTC. Pagani (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC), D. M. Palmer (LANL), T. Sakamoto (NASA/ORAU) and L. Vetere (PSU) report on behalf of the Swift Team: At 2007-02-27 22:21:59 Swift-BAT detected GRB 070227 (trigger 262347). The burst was not found automatically onboard, because a planned slew terminated the trigger prematurely. The burst was found later in ground analysis. Swift did not slew to the burst, and a target of opportunity observation for this burst will be uploaded at the next command opportunity (around 1400 UT).
TITLE: GCN CIRCULAR NUMBER: 6137 SUBJECT: GRB 070224: Swift detection of a burst DATE: 07/02/24 20:48:09 GMT FROM: Scott Barthelmy at NASA/GSFCJ. L. Racusin (PSU), L. M. Barbier (NASA/GSFC), S. D. Barthelmy (GSFC), M. M. Chester (PSU), G. Cusumano (INAF-IASFPA), D. Grupe (PSU), J. A. Kennea (PSU), D. M. Palmer (LANL), R. L. C. Starling (U Leicester) and L. Vetere (PSU) report on behalf of the Swift Team: At 20:27:58 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070224 (trigger=261880). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 178.990, -13.340 which is RA(J2000) = 11h 55m 58s Dec(J2000) = -13d 20' 23" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 25 sec. The peak count rate was ~500 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6125 SUBJECT: GRB070223: Swift burst DATE: 07/02/23 01:43:51 GMT FROM: Scott Barthelmy at NASA/GSFCL. Vetere (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), S. Campana (INAF-OAB), M. M. Chester (PSU), N. Gehrels (NASA/GSFC), D. Grupe (PSU), J. A. Kennea (PSU), W. B. Landsman (NASA/GSFC), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and E. Troja (INAF-IASFPA) report on behalf of the Swift Team: At 01:15:00 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070223 (trigger=261664). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 153.452, +43.121 which is RA(J2000) = 10h 13m 49s Dec(J2000) = +43d 07' 16" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows several peaks with a duration of about 50 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6114 SUBJECT: GRB 070220: Swift detection of a burst DATE: 07/02/20 05:05:13 GMT FROM: Scott Barthelmy at NASA/GSFCM. Stamatikos (NASA/ORAU), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), S. Immler (GSFC/USRA), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), T. Sakamoto (NASA/ORAU), P. Schady (MSSL-UCL) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 04:44:33 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070220 (trigger=261299). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 34.819, +68.818 which is RA(J2000) = +02h 19m 17s Dec(J2000) = +68d 49' 06" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows multiple peaks with a duration of about 60 sec. The peak count rate was ~7000 counts/sec (15-350 keV), at ~15 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6104 SUBJECT: GRB 070219: Swift detection of a burst DATE: 07/02/19 01:43:52 GMT FROM: Scott Barthelmy at NASA/GSFCT. Sakamoto (NASA/ORAU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Schady (MSSL-UCL), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester) and E. Troja (INAF-IASFPA) report on behalf of the Swift Team: At 01:10:16 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070219 (trigger=261132). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 260.198, +69.364 which is RA(J2000) = 17h 20m 48s Dec(J2000) = +69d 21' 51" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak with a duration of about 15 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~1 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6086 SUBJECT: GRB 070209: Swift detection of a short hard burst DATE: 07/02/09 03:53:23 GMT FROM: Scott Barthelmy at NASA/GSFCG. Sato (GSFC/ISAS), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), M. M. Chester (PSU), C. Gronwall (PSU), S. T. Holland (CRESST/GSFC/USRA), S. Immler (GSFC/USRA), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), M. Perri (ASDC), M. Stamatikos (NASA/ORAU), G. Stratta (ASDC) and D. E. Vanden Berk (PSU) report on behalf of the Swift Team: At 03:33:41 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070209 (trigger=259803). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 46.237, -47.370 which is RA(J2000) = 03h 04m 57s Dec(J2000) = -47d 22' 11" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single spike with a duration of about 0.2 sec. The peak count rate was ~2500 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6074 SUBJECT: GRB 070208: Swift detection of a burst DATE: 07/02/08 09:34:19 GMT FROM: Scott Barthelmy at NASA/GSFCG. Sato (GSFC/ISAS), S. D. Barthelmy (GSFC), S. Campana (INAF-OAB), M. L. Conciatore (ASDC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB), V. Mangano (INAF-IASFPA), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), G. Stratta (ASDC), G. Tagliaferri (INAF-OAB), S. D. Vergani (DIAS-DCU) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 09:10:34 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070208 (trigger=259714). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 197.920, +61.959 which is RA(J2000) = 13h 11m 41s Dec(J2000) = +61d 57' 31" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single peak structure with a duration of about 2 sec. The peak count rate was ~1200 counts/sec (15-350 keV), at ~0 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 6053 SUBJECT: GRB 070129: Swift detection of a burst DATE: 07/01/29 23:49:36 GMT FROM: David Burrows at PSU/SwiftO. Godet (U Leicester), D. N. Burrows (PSU), M. M. Chester (PSU), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU), C. B. Markwardt (GSFC/UMD), K. M. McLean (LANL/UTD), K. L. Page (U Leicester), D. M. Palmer (LANL), T. Sakamoto (NASA/ORAU), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA), D. E. Vanden Berk (PSU) and S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team: At 23:35:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070129 (trigger=258408). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 37.014, +11.697 which is RA(J2000) = 02h 28m 03s Dec(J2000) = +11d 41' 51" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows no obvious variation in the count rate, which is not uncommon for image triggers.
TITLE: GCN CIRCULAR NUMBER: 6027 SUBJECT: GRB 070126?: Swift detection of a possible burst DATE: 07/01/26 03:04:26 GMT FROM: Loredana Vetere at PSUL. Vetere (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC), S. T. Holland (CRESST/GSFC/USRA), S. Immler (GSFC/USRA), C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), J. L. Racusin (PSU), J. L. Racusin (PSU), M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester) and E. Troja (INAF-IASFPA) report on behalf of the Swift Team: At 02:33:26 UT, the Swift Burst Alert Telescope (BAT) triggered and located a possible source (trigger=257741). Swift slewed immediately to the location. The BAT on-board calculated location is RA, Dec 33.460, -73.523 which is RA(J2000) = 02h 13m 50s Dec(J2000) = -73d 31' 23" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows no significant variation, which is not uncommon for image triggers. We will have to wait for ground analysis to determine if this is a real source.
TITLE: GCN CIRCULAR NUMBER: 6005 SUBJECT: GRB 070110: Swift detection of a burst with a possible optical afterglow DATE: 07/01/10 07:57:12 GMT FROM: Scott Barthelmy at NASA/GSFCH. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), M. M. Chester (PSU), G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. B. Markwardt (GSFC/UMD), T. Mineo (INAF-IASFPA), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team: At 07:22:41 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070110 (trigger=255445). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 0.910, -52.961 which is RA(J2000) = 00h 03m 38s Dec(J2000) = -52d 57' 39" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a multi-peaked structure with a duration of about 70 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~18 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 5999 SUBJECT: GRB 070107: Swift detection of a burst DATE: 07/01/07 13:10:10 GMT FROM: Scott Barthelmy at NASA/GSFCM. Stamatikos (NASA/ORAU), S.D. Barthelmy (GSFC), M. M. Chester (PSU), G. Cusumano (INAF-IASFPA), W. B. Landsman (NASA/GSFC), T. Mineo (INAF-IASFPA), D. M. Palmer (LANL) and P. Romano (Univ. Bicocca & INAF-OAB) report on behalf of the Swift Team: At 12:05:18 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070107 (trigger=255029). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 159.408, -53.208 which is RA(J2000) = 10h 37m 38s Dec(J2000) = -53d 12' 27" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a broad peak lasting about 40 seconds with smaller structure. The peak count rate was ~2500 counts/sec (15-350 keV), at ~6 sec after the trigger.
TITLE: GCN CIRCULAR NUMBER: 5988 SUBJECT: GRB 070103: Swift detection of a burst DATE: 07/01/03 21:12:06 GMT FROM: Scott Barthelmy at NASA/GSFCT. Sakamoto (NASA/ORAU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA), S. Immler (GSFC/USRA), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), K. M. McLean (LANL/UTD), C. Pagani (PSU), S. B. Pandey (UCL-MSSL), A. M. Parsons (GSFC), P. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA), D. E. Vanden Berk (PSU) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team: At 20:46:39.41 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB (trigger=254532). Swift slewed immediately to the burst. The BAT on-board calculated location is RA=352.557, Dec=+26.875 (J2000), which is RA(J2000) = 23h 30m 14s Dec(J2000) = +26d 52' 32" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two peaks separated by ~10 sec and a few more weak peaks extending out to ~T+20 sec. The peak count rate was ~2400 counts/sec (15-350 keV), at ~0 sec after the trigger.