srclist overlap message for exposure 1 of trigger 1512686
uvot_overlap.pl vrs. 2010-12-20b fem started at 260922d21h27m46s143196usUT
The observation of trigger 1512686 started 2026-09-22T10:03:16.4
Examining file ./1512686_g156_uvot_sky_srclist.fits
The exposure ID is 811764196
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (227.8963,14.2057) with a roll angle of 258.0
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 (227.9040,14.2070) with a radius of 3.000 arc min
This is 0.457 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 (227.9085,14.2191) with a radius of 0.033 arc min
This is 1.073 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1512686
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260922d21h27m48s858368usUT
Observation start time is 2026-09-22T10:03:16.4
Examining file ./1512686_g156_uvot_catalog_srclist.fits
The exposure ID is 811764196
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 27 detected source(s) for 1512686_g156
Aspect correction adds -0.00174 degrees (-0.417 sec of time = -6.06 arc sec) to RA
Aspect correction adds -0.00022 degrees (-0.78 arcsec) to Dec
Total aspect correction is 6.11 arcsec
Star catalogs centered at 227.8959 , 14.1959 with radius 6.23 arc min.
n_usno: 492 n_gsc: 504
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.34912
RA DEC Mag Color
bright star 0: 227.93121 (15:11:43.49) 14.12372 (+14:07:25.4) 11.35 USNO-V
Mean distance difference (CAT_DELTA) for 22 matched entries is 0.513" for 1512686_g156
Mean and std. dev of mag. difference (MAG_DELTA) are 1.200 and 0.219 for 1512686_g156
Found 5 entries without IDs and 1 entries that are acceptable afterglow candidates for 1512686_g156.
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.
3 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=227.9040 (15:11:36.96) DEC=14.2070 (+14:12:25.2)
XRT distances are from RA=227.9085 (15:11:38.03) DEC=14.2191 (+14:13:08.7)
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1512686_g156 with 5x5 stamp
ra=227.94673 (15:11:47.21) dec=14.23175 (+14:13:54.3) +/- 1.1" mag=19.76+/-0.35
dist=141.1 REFID=27
*** The position of this source is inconsistent with the XRT position.
The position is 173.7 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 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)
*** If XRT position is correct, then this is NOT the afterglow
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",
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 1512686
------ Start for Possible Stand-alone Circular ----
In response to GRB260922 (Swift/BAT trigger 1512686) at 10:00:39 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
0.035.
------- notes for trigger 1512686 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 260922d21h27m51s814919usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1512686
-expid=811764196 -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/1512686/
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 811764196.44312 or about 2026:265:10:03:11 UT
Found 502 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 27 sources in
srclist catalog. Found 5 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 2 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 20.26 mag. Found 67 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region.
Genie image analysis:
Found 128952.2 counts in the large background region of 6250.0 pixels or a rate
of 20.632 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 19.53 mag. for a
4-arcsec aperture.
Found 4104.9 counts in the XRT position region of 199.0 pixels or a rate of
20.628 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.300 +/- 0.460 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.381 cps or 19.25 mag. The closest srclist
source has ra= 227.9094 dec= 14.2075 mag=16.96 sep=41.81". The closest Genie
source has ra= 227.9095 dec= 14.2074 mag=16.59 sep=42.08".
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?
811764196 122 WHITE srclist found no candidates.
811764196 122 WHITE image found no candidates.
List afterglow candidates for other finding charts.
811764408 334 U srclist found no candidates.
811764408 334 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 14.21908
GRB_ERROR: 5
GRB_RA: 227.90846
IMAGE_START_TIME: 10:03:11
MAGNITUDE: 19.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT