srclist overlap message for exposure 2 of trigger 1350381
uvot_overlap.pl vrs. 2010-12-20b fem started at 250917d06h42m38s386189usUT
The observation of trigger 1350381 started 2025-09-17T06:34:11.5
Examining file 1350381_g386_uvot_sky_srclist.fits
The exposure ID is 779783651
The exposure time is undefined.
The filter is U.
The uvot region is centered at (291.3713,11.1136) with a roll angle of 277.8
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 (291.3780,11.1130) with a radius of 3.000 arc min
This is 0.394 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
Could not find the location of an XRT error circle
srclist afterglow message for exposure 2 of trigger 1350381
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250917d06h42m39s658641usUT
Observation start time is 2025-09-17T06:34:11.5
Examining file 1350381_g386_uvot_catalog_srclist.fits
The exposure ID is 779783651
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 1350381_g386
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
Dimmest detected source in 1350381_g386 has mag 18.65
Aspect correction adds -0.00035 degrees (-0.084 sec of time = -1.23 arc sec) to RA
Aspect correction adds -0.00016 degrees (-0.56 arcsec) to Dec
Total aspect correction is 1.36 arcsec
Star catalogs centered at 291.3768 , 11.1124 with radius 8.24 arc min.
n_usno: 2842 n_gsc: 5220
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 8.84936
RA DEC Mag Color
bright star 0: 291.34622 (19:25:23.09) 11.11474 (+11:06:53.1) 10.54 USNO-V
bright star 1: 291.40320 (19:25:36.77) 11.06283 (+11:03:46.2) 8.85 USNO-V
bright star 2: 291.37930 (19:25:31.03) 11.19448 (+11:11:40.1) 11.39 USNO-V
bright star 3: 291.38727 (19:25:32.94) 11.03459 (+11:02:04.5) 11.98 GSC-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 64 matched entries is 0.765" for 1350381_g386
Mean and std. dev of mag. difference (MAG_DELTA) are 2.788 and 0.934 for 1350381_g386
Found 126 entries without IDs and 4 entries that are acceptable afterglow candidates for 1350381_g386.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
120 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=291.3780 (19:25:30.72) DEC=11.1130 (+11:06:46.8)
XRT distances are as reported in catalog file.
*** WARNING 66 per cent of entries have no IDs.
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1350381_g386 with 1x1 stamp
ra=291.38026 (19:25:31.26) dec=11.08923 (+11:05:21.2) +/- 1.1" mag=18.52+/-0.35
dist=85.9 REFID=177
src: 2 srclist_match has ID
src: 2 distr. of nearby unmatched sources: 1 0 0 0 0
Found 13 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
291.3771 11.0910 12.9 -1 USNO-B1 18.89 16.77 17.71
291.3761 11.0901 15.0 -1 USNO-B1 17.23 15.48 16.25
291.3796 11.0891 2.3 -1 USNO-B1 16.02 14.46 15.15 *
291.3795 11.0889 2.8 -1 USNO-B1 17.03 15.14 15.98 *
291.3841 11.0890 13.4 -1 USNO-B1 99.99 17.57 99.99
291.3794 11.0864 10.8 -1 USNO-B1 19.48 17.55 18.41
291.3773 11.0912 12.5 -1 GSC2.3 99.99 99.99 99.99
291.3760 11.0901 15.2 -1 GSC2.3 99.99 17.68 16.60
291.3798 11.0892 1.7 -1 GSC2.3 99.99 16.67 15.86 *
291.3792 11.0882 5.2 -1 GSC2.3 99.99 99.99 99.99
291.3841 11.0891 13.6 -1 GSC2.3 99.99 21.03 99.99
291.3841 11.0878 14.5 -1 GSC2.3 99.99 99.99 99.99
291.3794 11.0865 10.2 -1 GSC2.3 99.99 20.37 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 5 in the list of sources is a candidate afterglow for 1350381_g386 with 1x1 stamp
ra=291.40277 (19:25:36.67) dec=11.12671 (+11:07:36.1) +/- 1.1" mag=17.49+/-0.35
dist=100.5 REFID=168
src: 5 distr. of nearby unmatched sources: 1 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
291.4031 11.1226 14.8 -1 USNO-B1 18.59 16.56 17.46
291.4021 11.1257 4.2 -1 USNO-B1 12.78 12.14 12.42 *
291.4028 11.1288 7.5 -1 USNO-B1 18.34 15.72 16.88
291.4014 11.1311 16.8 -1 USNO-B1 20.12 17.42 18.62
291.3976 11.1247 19.5 -1 GSC2.3 99.99 20.86 18.68
291.4032 11.1225 15.1 -1 GSC2.3 99.99 19.37 18.52
291.4021 11.1257 4.2 -1 GSC2.3 99.99 99.99 12.46 *
291.4005 11.1308 16.7 -1 GSC2.3 99.99 21.02 99.99
291.4028 11.1290 8.4 -1 GSC2.3 99.99 19.89 18.24
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1350381_g386 with 1x1 stamp
ra=291.40311 (19:25:36.75) dec=11.12646 (+11:07:35.3) +/- 1.1" mag=17.83+/-0.35
dist=101.1 REFID=147
src: 6 distr. of nearby unmatched sources: 1 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
291.4031 11.1226 13.9 -1 USNO-B1 18.59 16.56 17.46
291.4021 11.1257 4.4 -1 USNO-B1 12.78 12.14 12.42 *
291.4060 11.1219 19.3 -1 USNO-B1 18.88 16.63 17.63
291.4028 11.1288 8.4 -1 USNO-B1 18.34 15.72 16.88
291.4014 11.1311 18.0 -1 USNO-B1 20.12 17.42 18.62
291.4032 11.1225 14.2 -1 GSC2.3 99.99 19.37 18.52
291.4021 11.1257 4.4 -1 GSC2.3 99.99 99.99 12.46 *
291.4005 11.1308 18.0 -1 GSC2.3 99.99 21.02 99.99
291.4028 11.1290 9.3 -1 GSC2.3 99.99 19.89 18.24
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 14 in the list of sources is a candidate afterglow for 1350381_g386 with 3x3 stamp
ra=291.37309 (19:25:29.54) dec=11.15161 (+11:09:05.8) +/- 1.1" mag=17.93+/-0.35
dist=140.1 REFID=105
src: 14 distr. of nearby unmatched sources: 0 0 0 0 0
Found 14 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
291.3758 11.1480 16.1 -1 USNO-B1 99.99 17.32 99.99
291.3684 11.1508 16.8 -1 USNO-B1 99.99 17.60 99.99
291.3740 11.1517 3.3 -1 USNO-B1 16.45 14.68 15.46 *
291.3696 11.1542 15.5 -1 USNO-B1 17.52 14.84 16.03
291.3744 11.1564 17.8 -1 USNO-B1 99.99 17.55 99.99
291.3719 11.1569 19.6 -1 USNO-B1 19.24 16.69 17.82
291.3758 11.1481 15.9 -1 GSC2.3 99.99 99.99 99.99
291.3729 11.1491 8.9 -1 GSC2.3 99.99 21.92 99.99
291.3687 11.1507 15.7 -1 GSC2.3 99.99 21.16 99.99
291.3766 11.1517 12.4 -1 GSC2.3 99.99 20.72 99.99
291.3738 11.1518 2.5 -1 GSC2.3 99.99 17.18 16.29 *
291.3696 11.1542 15.6 -1 GSC2.3 99.99 18.24 16.46
291.3745 11.1564 18.1 -1 GSC2.3 99.99 21.01 18.85
291.3719 11.1569 19.6 -1 GSC2.3 99.99 20.36 18.72
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 17.56, BAT distances < 200",
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 2 of trigger 1350381
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no image afterglow info
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB250917 (Swift/BAT trigger 1350381) at 06:27:44 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of nominal 250.000 seconds with the U filter
starting 350 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. Data from the 2.7'x2.7' sub-image are
not available at this time. The 8'x8' region for the list of sources generated
on-board covers 100% of the BAT 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 large, but
uncertain, extinction expected.
------- notes for trigger 1350381 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250917d06h42m44s215166usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1350381
-expid=779783651 -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/1350381/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position.
*** Warning -- no exposure found, using srclist assumed value.
No XRT position found for srclist. BAT position found.
UVOT exposure began at MET 779783651.46516 or about 2025:261:06:34:06 UT
Found 4161 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 42% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 126 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 17.56 mag.
The number of srclist sources filled the available telemetry. The weakest
source detected was 18.65 mag.
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?
779783651 350 U srclist found no candidates.
779783651 350 ? image data are not available.
List afterglow candidates for other finding charts.
779783439 138 WHITE srclist found no candidates.
779783439 138 WHITE image found no candidates.
------- Tokens for Quick GCN -------