srclist overlap message for exposure 2 of trigger 1512686
uvot_overlap.pl vrs. 2010-12-20b fem started at 260922d21h27m46s772274usUT
The observation of trigger 1512686 started 2026-09-22T10:06:48.8
Examining file ./1512686_g368_uvot_sky_srclist.fits
The exposure ID is 811764408
The exposure time is undefined.
The filter is U.
The uvot region is centered at (227.9030,14.2164) 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 0.570 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 0.357 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 2 of trigger 1512686
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260922d21h27m56s694573usUT
Observation start time is 2026-09-22T10:06:48.8
Examining file ./1512686_g368_uvot_catalog_srclist.fits
The exposure ID is 811764408
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 15 detected source(s) for 1512686_g368
Aspect correction adds -0.00185 degrees (-0.445 sec of time = -6.47 arc sec) to RA
Aspect correction adds -0.00006 degrees (-0.22 arcsec) to Dec
Total aspect correction is 6.47 arcsec
Star catalogs centered at 227.9039 , 14.2082 with radius 6.26 arc min.
n_usno: 509 n_gsc: 517
*** 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 15 matched entries is 0.585" for 1512686_g368
Mean and std. dev of mag. difference (MAG_DELTA) are 1.178 and 0.335 for 1512686_g368
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1512686_g368.
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.
0 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)
Found 0 entries in star catalog(s) within 10" of the XRT position.
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 18.12, 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 2 of trigger 1512686
IMAGE PROBLEM: partial overlap
------ 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 250 seconds with the U filter starting
334 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 17% of the
XRT error circle. The typical 3-sigma upper limit has been about 19.2 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 18.0 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 260922d21h27m58s906001usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1512686
-expid=811764408 -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 811764408.79372 or about 2026:265:10:06:43 UT
Found 515 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 15 sources in
srclist catalog. Found 0 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 1 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 20.25 mag. Found 49 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 8% of the
Genie image region. The Genie image is INCOMPLETE with 10759 null pixels.
Genie image analysis:
Found 17537.1 counts in the large background region of 4231.0 pixels or a rate
of 4.145 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 19.47 mag. for a
4-arcsec aperture.
Found 332.2 counts in the XRT position region of 84.0 pixels or a rate of 3.955
counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.044 +/- 0.078 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.234 cps or 19.70 mag. The closest srclist
source has ra= 227.9093 dec= 14.2074 mag=16.69 sep=42.22". The closest Genie
source has ra= 227.9094 dec= 14.2075 mag=16.28 sep=41.97".
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?
811764408 334 U srclist found no candidates.
811764408 334 U image found no candidates.
List afterglow candidates for other finding charts.
811764196 122 WHITE srclist found no candidates.
811764196 122 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 14.21908
GRB_ERROR: 5
GRB_RA: 227.90846
IMAGE_START_TIME: 10:06:43
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT