srclist overlap message for exposure 3 of trigger 1351790
uvot_overlap.pl vrs. 2010-12-20b fem started at 250924d21h36m41s810714usUT
The observation of trigger 1351790 started 2025-09-24T08:33:24.5
Examining file ./1351790_g894_uvot_sky_srclist.fits
The exposure ID is 780395604
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (51.8881,74.6638) with a roll angle of 51.6
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 (51.8650,74.6520) with a radius of 3.000 arc min
This is 0.796 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 (51.8724,74.6585) with a radius of 0.037 arc min
This is 0.404 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 3 of trigger 1351790
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250924d21h37m05s160172usUT
Observation start time is 2025-09-24T08:33:24.5
Examining file ./1351790_g894_uvot_catalog_srclist.fits
The exposure ID is 780395604
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1351790_g894
*** 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 1351790_g894 has mag 19.15
Aspect correction adds 0.00515 degrees (1.235 sec of time = 4.90 arc sec) to RA
Aspect correction adds 0.00043 degrees ( 1.55 arcsec) to Dec
Total aspect correction is 5.14 arcsec
Star catalogs centered at 51.8923 , 74.6662 with radius 8.98 arc min.
n_usno: 1131 n_gsc: 1248
*** WARNING -- bright star catalog has 5 entries brighter than 12 mag
The brightest has mag 10.87846
RA DEC Mag Color
bright star 0: 51.84171 (03:27:22.01) 74.62269 (+74:37:21.7) 11.83 GSC-V
bright star 1: 51.76947 (03:27:04.67) 74.76949 (+74:46:10.2) 10.88 USNO-V
bright star 2: 51.54083 (03:26:09.80) 74.72334 (+74:43:24.0) 10.92 USNO-V
bright star 3: 52.40069 (03:29:36.17) 74.68219 (+74:40:55.9) 11.44 USNO-V
bright star 4: 52.02092 (03:28:05.02) 74.71181 (+74:42:42.5) 11.62 GSC-V
Mean distance difference (CAT_DELTA) for 190 matched entries is 0.664" for 1351790_g894
Mean and std. dev of mag. difference (MAG_DELTA) are 1.078 and 0.542 for 1351790_g894
Found 2 entries without IDs and 0 entries that are acceptable afterglow candidates for 1351790_g894.
Acceptable entries have no ID, XRT distances < 5.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=51.8650 (03:27:27.60) DEC=74.6520 (+74:39:07.2)
XRT distances are from RA=51.8724 (03:27:29.37) DEC=74.6585 (+74:39:30.5)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 164:
ra= 51.55428 dec= 74.72335 +/- 1.1" mag=19.15+/-0.35 dist=381.6 REFID=176
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 19.22, XRT distances < 5.5",
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 1351790
------ Start for Possible Stand-alone Circular ----
In response to GRB250924 (Swift/BAT trigger 1351790) at 08:18:29 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 858 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 03:27:29.57 = 51.87320
DEC(J2000) = +74:39:33.8 = 74.65940
with a 90%-confidence error radius of about 0.67 arc sec. This position is 3.4
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.44 with a 1-sigma error of about 0.17. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.316.
------- notes for trigger 1351790 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250924d21h37m08s527694usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1351790
-expid=780395604 -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/1351790/
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 780395604.45624 or about 2025:268:08:33:19 UT
Found 1228 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 10% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 2 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 30 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 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.44 mag. Found 130 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 12% of the Genie image region. The
closest srclist source has ra= 51.8552 dec= 74.6552 mag=18.29 sep=20.22".
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?
780395604 858 WHITE srclist found no candidates.
780395604 858 WHITE 51.87320 74.65940 19.44/20.4 3.4 image Yes
List afterglow candidates for other finding charts.
780394938 192 WHITE 51.87355 74.65937 18.33/19.2 3.4 srclist Yes
780394938 192 WHITE 51.87340 74.65945 17.74/20.9 3.7 image Yes
780395096 350 U 51.87258 74.65915 18.79/18.1 2.4 srclist Yes
780395096 350 U 51.87351 74.65943 18.03/20.6 3.6 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 74.65940
GRB_ERROR: 0.67
GRB_RA: 51.87320
IMAGE_START_TIME: 08:33:19
MAGNITUDE: 19.44
MAG_ERROR: 0.17
MESSAGE_TYPE: ACK
SOURCE: XRT