srclist overlap message for exposure 1 of trigger 1401726
uvot_overlap.pl vrs. 2010-12-20b fem started at 251005d20h01m51s099565usUT
The observation of trigger 1401726 started 2025-10-05T16:09:33.2
Examining file ./1401726_g159_uvot_sky_srclist.fits
The exposure ID is 781373373
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (75.6812,16.8812) with a roll angle of 87.3
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 (75.6730,16.8820) with a radius of 3.000 arc min
This is 0.476 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 (75.6833,16.8801) with a radius of 0.035 arc min
This is 0.137 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1401726
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251005d20h01m54s621776usUT
Observation start time is 2025-10-05T16:09:33.2
Examining file ./1401726_g159_uvot_catalog_srclist.fits
The exposure ID is 781373373
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 62 detected source(s) for 1401726_g159
Aspect correction adds 0.00095 degrees (0.227 sec of time = 3.26 arc sec) to RA
Aspect correction adds -0.00053 degrees (-1.91 arcsec) to Dec
Total aspect correction is 3.77 arcsec
Star catalogs centered at 75.6871 , 16.8827 with radius 5.56 arc min.
n_usno: 377 n_gsc: 418
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 56 matched entries is 0.583" for 1401726_g159
Mean and std. dev of mag. difference (MAG_DELTA) are 1.090 and 0.257 for 1401726_g159
Found 6 entries without IDs and 2 entries that are acceptable afterglow candidates for 1401726_g159.
Acceptable entries have no ID, XRT distances < 5.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
Magnitude criteria will be applied later.
BAT distances are from RA=75.6730 (05:02:41.52) DEC=16.8820 (+16:52:55.2)
XRT distances are from RA=75.6833 (05:02:44.00) DEC=16.8801 (+16:52:48.3)
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1401726_g159 with 3x3 stamp
ra=75.65102 (05:02:36.24) dec=16.87867 (+16:52:43.2) +/- 1.1" mag=20.07+/-0.35
dist=111.4 REFID=62
*** The position of this source is inconsistent with the XRT position.
The position is 76.7 arc sec from the BAT position.
src: 6 distr. of nearby unmatched sources: 0 0 0 0 1
Found 4 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
75.6522 16.8784 4.1 -1 USNO-B1 16.65 14.59 15.50
75.6523 16.8784 4.5 -1 GSC2.3 14.44 16.43 14.85
75.6480 16.8769 12.0 -1 GSC2.3 19.89 99.99 99.99
75.6460 16.8760 19.9 -1 GSC2.3 17.58 19.49 18.35
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1401726_g159 with 3x3 stamp
ra=75.68173 (05:02:43.62) dec=16.90259 (+16:54:09.3) +/- 1.1" mag=19.72+/-0.35
dist=81.2 REFID=55
*** The position of this source is inconsistent with the XRT position.
The position is 80.0 arc sec from the BAT position.
src: 8 distr. of nearby unmatched sources: 0 0 0 0 1
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
75.6850 16.8996 15.7 -1 USNO-B1 19.49 16.59 17.88
75.6826 16.9023 3.1 -1 USNO-B1 15.25 13.82 14.45 *
75.6846 16.9051 13.2 -1 USNO-B1 15.16 13.83 14.42
75.6851 16.8996 15.9 -1 GSC2.3 16.50 19.09 17.37
75.6826 16.9022 3.3 -1 GSC2.3 13.69 15.13 14.07 *
75.6846 16.9050 13.3 -1 GSC2.3 13.59 15.00 14.08
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5.25",
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 1401726
------ Start for Possible Stand-alone Circular ----
In response to GRB251005 (Swift/BAT trigger 1401726) at 16:06:53 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 122 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 expected extinction corresponding to E(B-V) of
0.461.
------- notes for trigger 1401726 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 251005d20h01m57s097597usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1401726
-expid=781373373 -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/1401726/
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 781373373.23752 or about 2025:279:16:09:28 UT
Found 408 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 62 sources in
srclist catalog. Found 6 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 15 source(s) in Genie image catalog. Found 0 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.57 mag. Found 101 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
10% of the Genie image region.
Genie image analysis:
Found 71802.1 counts in the large background region of 6193.0 pixels or a rate
of 11.594 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 19.84 mag. for a
4-arcsec aperture.
Found 2254.1 counts in the XRT position region of 201.0 pixels or a rate of
11.214 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.489 +/- 0.342 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.025 cps or 19.58 mag. The closest srclist
source has ra= 75.6817 dec= 16.8669 mag=18.59 sep=47.93". The closest Genie
source has ra= 75.6710 dec= 16.8855 mag=19.04 sep=46.54".
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?
781373373 122 WHITE srclist found no candidates.
781373373 122 WHITE image found no candidates.
List afterglow candidates for other finding charts.
781373586 335 U srclist found no candidates.
781373586 335 U image found no candidates.
781374116 865 WHITE srclist found no candidates.
781374116 865 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 16.88008
GRB_ERROR: 5.25
GRB_RA: 75.68333
IMAGE_START_TIME: 16:09:28
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT