srclist overlap message for exposure 1 of trigger 921722
uvot_overlap.pl vrs. 2010-12-20b fem started at 190821d22h40m31s028044usUT
The observation of trigger 921722 started 2019-08-21T17:11:55.6
Examining file ./921722_g111_uvot_sky_srclist.fits
The exposure ID is 588100315
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (250.0485,-34.0103) with a roll angle of 274.9
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (250.0770,-34.0220) with a radius of 3.000 arc min
This is 1.580 arc min from the center of the uvot region
The area of the BAT error circle is 28.27 sq. arc min
The UVOT/BAT overlap is 26.93 sq. arc min or 0.95 of the BAT error circle
The XRT error circle is centered at (250.0548,-34.0071) with a radius of 0.027 arc min
This is 0.365 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 921722
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190821d22h40m34s114404usUT
Observation start time is 2019-08-21T17:11:55.6
Examining file ./921722_g111_uvot_catalog_srclist.fits
The exposure ID is 588100315
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 921722_g111
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.887
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 921722_g111 has mag 18.93
Aspect correction adds 0.00034 degrees (0.081 sec of time = 1.01 arc sec) to RA
Aspect correction adds 0.00023 degrees ( 0.82 arcsec) to Dec
Total aspect correction is 1.30 arcsec
Star catalogs centered at 250.0504 , -34.0089 with radius 6.41 arc min.
n_usno: 3423 n_gsc: 0
*** WARNING -- bright star catalog has 8 entries brighter than 12 mag
The brightest has mag 11.07
RA DEC Mag Color
bright star 0: 250.01719 (16:40:04.13) -34.01864 (-34:01:07.1) 11.94 USNO-R
bright star 1: 250.12092 (16:40:29.02) -34.00098 (-34:00:03.5) 11.99 USNO-R
bright star 2: 250.10784 (16:40:25.88) -33.94151 (-33:56:29.5) 11.43 USNO-V
bright star 3: 250.08720 (16:40:20.93) -33.93093 (-33:55:51.4) 11.07 USNO-R
bright star 4: 250.06542 (16:40:15.70) -33.91863 (-33:55:07.1) 11.27 USNO-V
bright star 5: 250.15251 (16:40:36.60) -34.04785 (-34:02:52.2) 11.38 USNO-V
bright star 6: 250.14837 (16:40:35.61) -34.05889 (-34:03:32.0) 11.25 USNO-R
bright star 7: 249.98521 (16:39:56.45) -34.08849 (-34:05:18.5) 11.86 USNO-R
Mean distance difference (CAT_DELTA) for 186 matched entries is 0.841" for 921722_g111
Mean and std. dev of mag. difference (MAG_DELTA) are 2.337 and 0.685 for 921722_g111
Found 15 entries without IDs and 8 entries that are acceptable afterglow candidates for 921722_g111.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=250.0770 (16:40:18.48) DEC=-34.0220 (-34:01:19.2)
XRT distances are from RA=250.0548 (16:40:13.15) DEC=-34.0071 (-34:00:25.6)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 921722_g111 with 1x1 stamp
ra=250.06542 (16:40:15.70) dec=-34.00958 (-34:00:34.5) +/- 1.1" mag=18.44+/-0.35
dist=32.9 REFID=130
*** The position of this source is inconsistent with the XRT position.
The position is 56.5 arc sec from the BAT position.
src: 2 srclist_match has ID
src: 2 distr. of nearby unmatched sources: 0 0 0 0 0
Found 14 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
250.0601 -34.0068 18.8 -1 USNO-B1 99.99 20.67 99.99
250.0605 -34.0069 17.6 -1 USNO-B1 99.99 25.06 99.99
250.0613 -34.0089 12.6 -1 USNO-B1 18.33 16.88 17.52
250.0617 -34.0073 13.7 -1 USNO-B1 99.99 18.09 99.99
250.0617 -34.0113 12.7 -1 USNO-B1 17.95 17.83 17.88
250.0649 -34.0080 5.7 -1 USNO-B1 17.51 15.24 16.25
250.0651 -34.0082 5.0 -1 USNO-B1 99.99 15.83 99.99
250.0652 -34.0094 0.9 -1 USNO-B1 17.01 15.39 16.11 *
250.0660 -34.0093 2.0 -1 USNO-B1 99.99 15.93 99.99 *
250.0663 -34.0071 9.3 -1 USNO-B1 99.99 17.36 99.99
250.0664 -34.0131 13.1 -1 USNO-B1 18.08 16.68 17.30
250.0673 -34.0077 8.9 -1 USNO-B1 18.21 19.59 18.98
250.0678 -34.0100 7.2 -1 USNO-B1 99.99 18.63 99.99
250.0690 -34.0052 19.1 -1 USNO-B1 18.72 18.92 18.83
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 25 in the list of sources is a candidate afterglow for 921722_g111 with 1x1 stamp
ra=250.07007 (16:40:16.82) dec=-34.03151 (-34:01:53.4) +/- 1.1" mag=18.51+/-0.35
dist=99.0 REFID=182
*** The position of this source is inconsistent with the XRT position.
The position is 40.0 arc sec from the BAT position.
src: 25 srclist_match has ID
src: 25 distr. of nearby unmatched sources: 0 0 0 0 0
Found 10 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
250.0704 -34.0271 15.8 -1 USNO-B1 17.26 16.09 16.61
250.0707 -34.0271 15.9 -1 USNO-B1 99.99 16.51 99.99
250.0711 -34.0269 16.8 -1 USNO-B1 17.80 16.35 17.00
250.0699 -34.0297 6.5 -1 USNO-B1 17.76 17.56 17.65
250.0699 -34.0301 5.3 -1 USNO-B1 99.99 17.18 99.99
250.0697 -34.0311 1.7 -1 USNO-B1 17.24 15.30 16.16 *
250.0655 -34.0340 16.3 -1 USNO-B1 17.90 17.20 17.51
250.0740 -34.0306 12.3 -1 USNO-B1 99.99 17.96 99.99
250.0743 -34.0308 12.8 -1 USNO-B1 99.99 17.40 99.99
250.0746 -34.0312 13.6 -1 USNO-B1 18.50 17.80 18.11
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 31 in the list of sources is a candidate afterglow for 921722_g111 with 3x3 stamp
ra=250.05876 (16:40:14.10) dec=-34.03590 (-34:02:09.2) +/- 1.1" mag=16.76+/-0.35
dist=104.3 REFID=33
*** The position of this source is inconsistent with the XRT position.
The position is 73.9 arc sec from the BAT position.
src: 31 srclist_match has ID
src: 31 distr. of nearby unmatched sources: 1 0 0 0 0
Found 7 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
250.0572 -34.0308 19.1 -1 USNO-B1 16.85 14.83 15.73
250.0575 -34.0318 15.3 -1 USNO-B1 17.45 18.95 18.28
250.0595 -34.0324 12.9 -1 USNO-B1 18.11 17.87 17.98
250.0552 -34.0359 10.6 -1 USNO-B1 99.99 16.57 99.99
250.0589 -34.0354 1.8 -1 USNO-B1 15.54 13.84 14.59 *
250.0603 -34.0383 10.0 -1 USNO-B1 17.23 16.68 16.92
250.0577 -34.0396 13.6 -1 USNO-B1 16.13 13.84 14.85
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 49 in the list of sources is a candidate afterglow for 921722_g111 with 3x3 stamp
ra=250.01513 (16:40:03.63) dec=-34.01152 (-34:00:41.5) +/- 1.1" mag=17.79+/-0.35
dist=119.4 REFID=75
*** The position of this source is inconsistent with the XRT position.
The position is 188.4 arc sec from the BAT position.
src: 49 distr. of nearby unmatched sources: 0 1 0 0 0
Found 7 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
250.0193 -34.0097 13.9 -1 USNO-B1 16.76 15.36 15.98
250.0180 -34.0109 9.0 -1 USNO-B1 99.99 18.07 99.99
250.0174 -34.0116 6.7 -1 USNO-B1 99.99 20.61 99.99
250.0149 -34.0101 5.1 -1 USNO-B1 15.99 13.95 14.86
250.0149 -34.0109 2.2 -1 USNO-B1 16.44 13.85 15.00 *
250.0135 -34.0119 5.1 -1 USNO-B1 19.27 15.94 17.42
250.0115 -34.0159 19.0 -1 USNO-B1 17.29 16.08 16.61
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 50 in the list of sources is a candidate afterglow for 921722_g111 with 3x3 stamp
ra=250.01455 (16:40:03.49) dec=-34.00953 (-34:00:34.3) +/- 1.1" mag=18.38+/-0.35
dist=120.4 REFID=94
*** The position of this source is inconsistent with the XRT position.
The position is 191.7 arc sec from the BAT position.
src: 50 distr. of nearby unmatched sources: 0 1 0 0 0
Found 8 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
250.0193 -34.0097 14.1 -1 USNO-B1 16.76 15.36 15.98
250.0185 -34.0066 16.0 -1 USNO-B1 99.99 18.55 99.99
250.0180 -34.0109 11.5 -1 USNO-B1 99.99 18.07 99.99
250.0174 -34.0116 11.2 -1 USNO-B1 99.99 20.61 99.99
250.0149 -34.0101 2.3 -1 USNO-B1 15.99 13.95 14.86 *
250.0149 -34.0109 5.1 -1 USNO-B1 16.44 13.85 15.00
250.0135 -34.0119 9.0 -1 USNO-B1 19.27 15.94 17.42
250.0121 -34.0055 16.3 -1 USNO-B1 99.99 18.76 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 52 in the list of sources is a candidate afterglow for 921722_g111 with 1x1 stamp
ra=250.05349 (16:40:12.84) dec=-33.97182 (-33:58:18.6) +/- 1.1" mag=18.62+/-0.35
dist=127.1 REFID=132
*** The position of this source is inconsistent with the XRT position.
The position is 193.8 arc sec from the BAT position.
src: 52 srclist_match has ID
src: 52 distr. of nearby unmatched sources: 0 0 1 0 0
Found 8 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
250.0510 -33.9763 17.6 -1 USNO-B1 17.48 16.07 16.69
250.0505 -33.9761 17.7 -1 USNO-B1 16.60 18.08 17.42
250.0517 -33.9757 14.9 -1 USNO-B1 18.01 16.81 17.35
250.0531 -33.9717 1.3 -1 USNO-B1 16.61 14.76 15.58 *
250.0546 -33.9690 10.7 -1 USNO-B1 17.38 15.43 16.30
250.0485 -33.9687 18.7 -1 USNO-B1 18.24 17.73 17.96
250.0540 -33.9682 13.2 -1 USNO-B1 15.99 13.03 14.34
250.0537 -33.9679 14.0 -1 USNO-B1 15.17 13.56 14.27
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 87 in the list of sources is a candidate afterglow for 921722_g111 with 3x3 stamp
ra=250.08603 (16:40:20.65) dec=-34.04654 (-34:02:47.5) +/- 1.1" mag=16.79+/-0.35
dist=169.8 REFID=36
*** The position of this source is inconsistent with the XRT position.
The position is 92.4 arc sec from the BAT position.
src: 87 srclist_match has ID
src: 87 distr. of nearby unmatched sources: 2 0 0 0 0
Found 8 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
250.0852 -34.0450 5.9 -1 USNO-B1 17.18 15.67 16.34
250.0859 -34.0457 3.2 -1 USNO-B1 99.99 13.92 99.99 *
250.0861 -34.0462 1.2 -1 USNO-B1 15.98 13.23 14.45 *
250.0882 -34.0460 6.8 -1 USNO-B1 17.73 18.13 17.96
250.0833 -34.0498 14.1 -1 USNO-B1 17.75 18.12 17.96
250.0837 -34.0497 13.1 -1 USNO-B1 17.11 15.20 16.05
250.0926 -34.0473 19.7 -1 USNO-B1 21.64 20.26 20.87
250.0891 -34.0498 14.8 -1 USNO-B1 17.33 14.96 16.01
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 150 in the list of sources is a candidate afterglow for 921722_g111 with 1x1 stamp
ra=250.05458 (16:40:13.10) dec=-34.06941 (-34:04:09.9) +/- 1.1" mag=18.62+/-0.35
dist=224.3 REFID=179
*** The position of this source is inconsistent with the XRT position.
The position is 183.3 arc sec from the BAT position.
src: 150 srclist_match has ID
src: 150 distr. of nearby unmatched sources: 0 0 0 0 0
Found 9 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
250.0545 -34.0653 14.8 -1 USNO-B1 19.12 17.19 18.05
250.0561 -34.0668 10.3 -1 USNO-B1 15.07 12.64 13.72 *
250.0549 -34.0691 1.5 -1 USNO-B1 16.95 14.92 15.82 *
250.0604 -34.0709 18.1 -1 USNO-B1 17.79 16.08 16.84
250.0525 -34.0726 13.0 -1 USNO-B1 17.56 16.54 16.99
250.0598 -34.0724 18.8 -1 USNO-B1 99.99 16.16 99.99
250.0600 -34.0726 19.7 -1 USNO-B1 18.17 17.12 17.59
250.0553 -34.0740 16.7 -1 USNO-B1 99.99 14.88 99.99
250.0550 -34.0748 19.5 -1 USNO-B1 16.15 12.85 14.32 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 6 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
250.0523 -34.0069 7.4 -1 USNO-B1 17.34 15.71 16.44
250.0527 -34.0067 6.5 -1 USNO-B1 99.99 16.92 99.99
250.0526 -34.0058 8.0 -1 USNO-B1 18.03 17.29 17.62
250.0548 -34.0076 1.7 -1 USNO-B1 99.99 17.80 99.99
250.0550 -34.0077 2.1 -1 USNO-B1 99.99 17.84 99.99
250.0574 -34.0061 8.5 -1 USNO-B1 17.87 17.77 17.81
The closest star is 1.71" away.
List UVOT sources within 10" of the XRT position:
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 921722
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB190821 (Swift/BAT trigger 921722) at 17:10:03 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 88 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of
the XRT error circle. Because of the density of catalogued stars, further
analysis is required to report an upper limit for any afterglow in the
sub-image. The 8'x8' region for the list of sources generated on-board covers
100% of the XRT error circle. Because of the density of catalogued stars,
further analysis is required to report an upper limit for any afterglow in the
region. No correction has been made for the expected extinction corresponding
to E(B-V) of 0.53.
------- notes for trigger 921722 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190821d22h40m42s048520usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=921722
-expid=588100315 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/921722/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 588100315.62856 or about 2019:233:17:11:50 UT
Found 3419 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 57% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 15 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 64 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 6 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.35 mag. Found 539 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 49% of the Genie image region.
Genie image analysis:
Found 87594.4 counts in the large background region of 4962.0 pixels or a rate
of 17.653 counts/pixel in a radius of 45.0 arcsec. Based on this background,
the typical 5-sigma UL at a random point in the Genie image is 19.79 mag. for a
4-arcsec aperture.
Found 3941.7 counts in the XRT position region of 198.0 pixels or a rate of
19.908 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 3.496 +/- 0.453 (1-sigma) cps or
18.42 mag and a range from 18.29 to 18.57 mag. The 3-sigma UL at the XRT
position is 4.855 cps or 18.06 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.93 mag. The closest
srclist source has ra= 250.0651 dec= -34.0082 mag=18.79 sep=31.11".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 250.0520 dec= -34.0073 mag=18.07 sep=8.31". The closest Genie
source has ra= 250.0520 dec= -34.0073 mag=18.07 sep=8.31".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 88 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 16:40:12.48 = 250.05201
DEC(J2000) = -34:00:26.2 = -34.00729
with a 90%-confidence error radius of about 0.62 arc sec. This position is 8.31
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.07 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.53.
All AG candidates sorted by magnitude for the current finding chart.
(U/V/White SRCLIST mags < 17.5/17.5/18.5 are reliable. Mag > 18.5/18.5/19.5 are
not. Others are uncertain.)
(U/V/White Genie image mags < 18.0/18.0/19.0 are reliable. Mag > 19.0/19.0/20.0
are not. Others are uncertain.)
(Magnitudes followed by * have been corrected for exposure.)
---MET--- -dt- filter ---RA-- ---DEC--- -MAG/Limit Dist(") Source Asp.Corr?
588100315 87 WHITE srclist found no candidates.
588100315 87 WHITE image found no candidates.
List afterglow candidates for other finding charts.
588100529 301 U srclist found no candidates.
588100529 301 U image found no candidates.
------- Tokens for Quick GCN -------