srclist overlap message for exposure 3 of trigger 844015
uvot_overlap.pl vrs. 2010-12-20b fem started at 180623d21h26m51s461399usUT
The observation of trigger 844015 started 2018-06-23T16:56:55.4
Examining file ./844015_g898_uvot_sky_srclist.fits
The exposure ID is 551465815
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (214.5261,-60.2557) with a roll angle of 253.6
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (214.5110,-60.2940) with a radius of 3.000 arc min
This is 2.342 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (214.5288,-60.2535) with a radius of 0.025 arc min
This is 0.152 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 3 of trigger 844015
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180623d21h27m27s478503usUT
Observation start time is 2018-06-23T16:56:55.4
Examining file ./844015_g898_uvot_catalog_srclist.fits
The exposure ID is 551465815
The exposure is 118.691 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 844015_g898
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 844015_g898 has mag 18.93
Aspect correction adds -0.00093 degrees (-0.222 sec of time = -1.65 arc sec) to RA
Aspect correction adds -0.00022 degrees (-0.79 arcsec) to Dec
Total aspect correction is 1.83 arcsec
Star catalogs centered at 214.5119 , -60.2675 with radius 8.55 arc min.
n_usno: 3005 n_gsc: 6373
*** WARNING -- bright star catalog has 22 entries brighter than 12 mag
The brightest has mag 10.025
RA DEC Mag Color
bright star 0: 214.47406 (14:17:53.77) -60.27144 (-60:16:17.2) 10.93 USNO-R
bright star 1: 214.47120 (14:17:53.09) -60.27201 (-60:16:19.2) 11.51 USNO-V
bright star 2: 214.56951 (14:18:16.68) -60.23391 (-60:14:02.1) 10.97 USNO-V
bright star 3: 214.59179 (14:18:22.03) -60.30794 (-60:18:28.6) 11.43 USNO-V
bright star 4: 214.62835 (14:18:30.80) -60.21747 (-60:13:02.9) 10.02 USNO-V
bright star 5: 214.36589 (14:17:27.81) -60.31669 (-60:19:00.1) 11.75 USNO-V
bright star 6: 214.36426 (14:17:27.42) -60.31603 (-60:18:57.7) 11.91 USNO-V
bright star 7: 214.46762 (14:17:52.23) -60.35371 (-60:21:13.3) 11.89 USNO-V
bright star 8: 214.32324 (14:17:17.58) -60.25158 (-60:15:05.7) 11.40 USNO-R
bright star 9: 214.50328 (14:18:00.79) -60.17164 (-60:10:17.9) 11.37 USNO-V
bright star 10: 214.56284 (14:18:15.08) -60.36341 (-60:21:48.3) 11.76 USNO-R
bright star 11: 214.69429 (14:18:46.63) -60.21767 (-60:13:03.6) 11.61 GSC-F
bright star 12: 214.49425 (14:17:58.62) -60.38555 (-60:23:08.0) 11.96 USNO-V
bright star 13: 214.38152 (14:17:31.56) -60.15991 (-60:09:35.7) 10.45 USNO-V
bright star 14: 214.47877 (14:17:54.90) -60.39414 (-60:23:38.9) 11.75 USNO-V
bright star 15: 214.31421 (14:17:15.41) -60.35555 (-60:21:20.0) 10.94 GSC-V
bright star 16: 214.58153 (14:18:19.57) -60.14056 (-60:08:26.0) 11.21 GSC-F
bright star 17: 214.70343 (14:18:48.82) -60.27228 (-60:16:20.2) 11.37 GSC-F
bright star 18: 214.31458 (14:17:15.50) -60.25027 (-60:15:01.0) 11.79 GSC-F
bright star 19: 214.62660 (14:18:30.38) -60.17083 (-60:10:15.0) 11.92 GSC-F
bright star 20: 214.25984 (14:17:02.36) -60.22878 (-60:13:43.6) 10.78 GSC-F
bright star 21: 214.41023 (14:17:38.46) -60.14638 (-60:08:47.0) 11.26 GSC-F
Mean distance difference (CAT_DELTA) for 188 matched entries is 0.835" for 844015_g898
Mean and std. dev of mag. difference (MAG_DELTA) are 1.797 and 0.668 for 844015_g898
Found 17 entries without IDs and 4 entries that are acceptable afterglow candidates for 844015_g898.
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.
10 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=214.5110 (14:18:02.64) DEC=-60.2940 (-60:17:38.4)
XRT distances are from RA=214.5288 (14:18:06.91) DEC=-60.2535 (-60:15:12.7)
-----------------
Entry 125 in the list of sources is a candidate afterglow for 844015_g898 with 3x3 stamp
ra=214.59016 (14:18:21.64) dec=-60.32742 (-60:19:38.7) +/- 1.1" mag=16.26+/-0.35
dist=287.6 REFID=57
*** The position of this source is inconsistent with the XRT position.
The position is 185.5 arc sec from the BAT position.
src: 125 srclist_match has ID
src: 125 distr. of nearby unmatched sources: 1 0 0 0 0
Found 6 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
214.5927 -60.3231 16.1 -1 USNO-B1 99.99 20.06 99.99
214.5892 -60.3281 2.8 -1 USNO-B1 14.18 12.46 13.22 *
214.5948 -60.3277 8.3 -1 USNO-B1 99.99 18.45 99.99
214.5900 -60.3275 0.4 -1 GSC2.3 13.72 15.23 99.99 *
214.5878 -60.3290 7.0 -1 GSC2.3 14.49 15.79 99.99
214.5952 -60.3277 9.1 -1 GSC2.3 20.57 99.99 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 126 in the list of sources is a candidate afterglow for 844015_g898 with 1x1 stamp
ra=214.59029 (14:18:21.67) dec=-60.32771 (-60:19:39.7) +/- 1.1" mag=17.13+/-0.35
dist=288.7 REFID=186
*** The position of this source is inconsistent with the XRT position.
The position is 186.3 arc sec from the BAT position.
src: 126 srclist_match has ID
src: 126 distr. of nearby unmatched sources: 1 0 0 0 0
Found 6 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
214.5927 -60.3231 17.1 -1 USNO-B1 99.99 20.06 99.99
214.5892 -60.3281 2.2 -1 USNO-B1 14.18 12.46 13.22 *
214.5948 -60.3277 8.0 -1 USNO-B1 99.99 18.45 99.99
214.5900 -60.3275 0.9 -1 GSC2.3 13.72 15.23 99.99 *
214.5878 -60.3290 6.4 -1 GSC2.3 14.49 15.79 99.99
214.5952 -60.3277 8.8 -1 GSC2.3 20.57 99.99 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 130 in the list of sources is a candidate afterglow for 844015_g898 with 3x3 stamp
ra=214.58773 (14:18:21.06) dec=-60.32888 (-60:19:44.0) +/- 1.1" mag=17.20+/-0.35
dist=290.9 REFID=88
*** The position of this source is inconsistent with the XRT position.
The position is 185.7 arc sec from the BAT position.
src: 130 srclist_match has ID
src: 130 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
214.5892 -60.3281 4.0 -1 USNO-B1 14.18 12.46 13.22 *
214.5948 -60.3277 13.2 -1 USNO-B1 99.99 18.45 99.99
214.5873 -60.3342 19.1 -1 USNO-B1 18.86 17.43 18.06
214.5900 -60.3275 6.4 -1 GSC2.3 13.72 15.23 99.99
214.5878 -60.3290 0.3 -1 GSC2.3 14.49 15.79 99.99 *
214.5952 -60.3277 14.0 -1 GSC2.3 20.57 99.99 99.99
214.5871 -60.3341 19.0 -1 GSC2.3 18.06 20.73 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 140 in the list of sources is a candidate afterglow for 844015_g898 with 1x1 stamp
ra=214.52282 (14:18:05.48) dec=-60.33828 (-60:20:17.8) +/- 1.1" mag=17.78+/-0.35
dist=305.3 REFID=113
*** The position of this source is inconsistent with the XRT position.
The position is 160.8 arc sec from the BAT position.
src: 140 srclist_match has ID
src: 140 distr. of nearby unmatched sources: 0 1 0 0 0
Found 12 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
214.5236 -60.3335 17.3 -1 USNO-B1 99.99 19.36 99.99
214.5237 -60.3359 8.8 -1 USNO-B1 13.56 12.86 13.17 *
214.5234 -60.3362 7.6 -1 USNO-B1 13.56 11.93 12.65 *
214.5219 -60.3374 3.4 -1 USNO-B1 16.20 13.13 14.49 *
214.5199 -60.3376 5.7 -1 USNO-B1 17.56 16.75 17.11
214.5192 -60.3377 6.7 -1 USNO-B1 17.74 16.52 17.06
214.5222 -60.3390 2.9 -1 USNO-B1 15.77 14.85 15.26 *
214.5178 -60.3396 10.2 -1 USNO-B1 20.16 17.86 18.88
214.5240 -60.3357 9.5 -1 GSC2.3 12.72 13.49 99.99 *
214.5192 -60.3375 7.1 -1 GSC2.3 16.96 18.58 99.99
214.5223 -60.3387 1.6 -1 GSC2.3 14.93 16.58 99.99 *
214.5173 -60.3396 11.0 -1 GSC2.3 17.91 21.21 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
Found 2 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
214.5287 -60.2539 1.4 -1 USNO-B1 20.55 17.85 19.05
214.5285 -60.2539 1.6 -1 GSC2.3 17.61 20.75 99.99
The closest star is 1.37" 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 19.09, 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 3 of trigger 844015
SRCLIST PROBLEM: srclist filled telemetry buffer
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
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 GRB180623 (Swift/BAT trigger 844015) at 16:41:56 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 119 seconds with the White filter
starting 877 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. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the large, but uncertain, extinction expected.
------- notes for trigger 844015 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180623d21h27m37s139693usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=844015
-expid=551465815 -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/844015/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Large extinction of 24.59 found for bat position. Unreliable extinction found
for xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 551465815.44064 or about 2018:174:16:56:50 UT
Found 3001 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 28% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 17 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.09 mag.
Found 34 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 7 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.34 mag. Found 305 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 27% of the Genie image region.
Genie image analysis:
Found 59943.4 counts in the large background region of 5349.0 pixels or a rate
of 11.206 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 2381.0 counts in the XRT position region of 203.0 pixels or a rate of
11.729 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.498 +/- 0.453 (1-sigma) cps or
20.54 mag and a range from 19.84 to 23.16 mag. The 3-sigma UL at the XRT
position is 1.856 cps or 19.11 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.93 mag. The closest
srclist source has ra= 214.5420 dec= -60.2442 mag=17.86 sep=41.12".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 214.5290 dec= -60.2539 mag=20.58 sep=1.40". The closest Genie
source has ra= 214.5290 dec= -60.2539 mag=20.58 sep=1.40".
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 119 seconds with the White filter
starting 877 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 14:18:06.95 = 214.52896
DEC(J2000) = -60:15:14.1 = -60.25391
with a 90%-confidence error radius of about 0.97 arc sec. This position is 1.40
arc sec. from the center of the XRT error circle. The estimated magnitude is
20.58 with a 1-sigma error of about 0.29. No correction has been made for the
large, but uncertain, extinction expected.
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?
551465815 877 WHITE srclist found no candidates.
551465815 877 WHITE image found no candidates.
List afterglow candidates for other finding charts.
551465023 85 WHITE srclist found no candidates.
551465023 85 WHITE image found no candidates.
551465236 298 U srclist found no candidates.
551465236 298 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -60.25353
GRB_ERROR: 5
GRB_RA: 214.52879
IMAGE_START_TIME: 16:56:50
MAGNITUDE: 19.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT