srclist overlap message for exposure 2 of trigger 1347265
uvot_overlap.pl vrs. 2010-12-20b fem started at 250905d10h53m54s389867usUT
The observation of trigger 1347265 started 2025-09-05T02:15:31.3
Examining file ./1347265_g336_uvot_sky_srclist.fits
The exposure ID is 778731331
The exposure time is undefined.
The filter is U.
The uvot region is centered at (233.0399,0.7777) with a roll angle of 277.0
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 (233.0470,0.7770) with a radius of 3.000 arc min
This is 0.429 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 (233.0056,0.7937) with a radius of 0.042 arc min
This is 2.271 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 1347265
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250905d10h54m07s425037usUT
Observation start time is 2025-09-05T02:15:31.3
Examining file ./1347265_g336_uvot_catalog_srclist.fits
The exposure ID is 778731331
The exposure is 104.427 sec.
The bin size is 2 pixels
The filter is U
There are 50 detected source(s) for 1347265_g336
Aspect correction adds -0.00132 degrees (-0.316 sec of time = -4.74 arc sec) to RA
Aspect correction adds 0.00014 degrees ( 0.49 arcsec) to Dec
Total aspect correction is 4.77 arcsec
Star catalogs centered at 233.0506 , 0.7901 with radius 8.04 arc min.
n_usno: 718 n_gsc: 790
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 11.0866
RA DEC Mag Color
bright star 0: 233.05287 (15:32:12.69) 0.86039 (+00:51:37.4) 11.57 USNO-V
bright star 1: 233.00569 (15:32:01.37) 0.89267 (+00:53:33.6) 11.09 USNO-V
Mean distance difference (CAT_DELTA) for 45 matched entries is 0.830" for 1347265_g336
Mean and std. dev of mag. difference (MAG_DELTA) are 2.345 and 0.767 for 1347265_g336
Found 7 entries without IDs and 4 entries that are acceptable afterglow candidates for 1347265_g336.
Acceptable entries have no ID, XRT distances < 6.25", 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=233.0470 (15:32:11.28) DEC= 0.7770 (+00:46:37.2)
XRT distances are from RA=233.0056 (15:32:01.34) DEC= 0.7937 (+00:47:37.3)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1347265_g336 with 5x5 stamp
ra=233.04227 (15:32:10.14) dec=0.80376 (+00:48:13.5) +/- 1.1" mag=19.77+/-0.35
dist=136.9 REFID=39
*** The position of this source is inconsistent with the XRT position.
The position is 97.8 arc sec from the BAT position.
src: 0 distr. of nearby unmatched sources: 0 2 0 0 0
Found 6 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
233.0417 0.8050 4.8 -1 USNO-B1 12.96 11.71 12.27 *
233.0392 0.8053 12.3 -1 USNO-B1 21.60 19.35 20.35
233.0442 0.8086 18.7 -1 USNO-B1 19.60 18.83 19.17
233.0414 0.8041 3.2 -1 GSC2.3 99.99 99.99 99.99 *
233.0417 0.8050 4.8 -1 GSC2.3 12.02 12.96 99.99 *
233.0443 0.8086 18.9 -1 GSC2.3 19.92 19.86 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 2 in the list of sources is a candidate afterglow for 1347265_g336 with 5x5 stamp
ra=233.04200 (15:32:10.08) dec=0.80603 (+00:48:21.7) +/- 1.1" mag=18.12+/-0.35
dist=138.4 REFID=23
*** The position of this source is inconsistent with the XRT position.
The position is 106.0 arc sec from the BAT position.
src: 2 distr. of nearby unmatched sources: 1 1 0 0 0
Found 7 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
233.0417 0.8050 4.0 -1 USNO-B1 12.96 11.71 12.27 *
233.0392 0.8053 10.3 -1 USNO-B1 21.60 19.35 20.35
233.0442 0.8086 12.1 -1 USNO-B1 19.60 18.83 19.17
233.0414 0.8041 7.2 -1 GSC2.3 99.99 99.99 99.99
233.0417 0.8050 3.8 -1 GSC2.3 12.02 12.96 99.99 *
233.0443 0.8086 12.4 -1 GSC2.3 19.92 19.86 99.99
233.0419 0.8094 12.1 -1 GSC2.3 20.42 99.99 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 3 in the list of sources is a candidate afterglow for 1347265_g336 with 3x3 stamp
ra=233.04215 (15:32:10.12) dec=0.80648 (+00:48:23.3) +/- 1.1" mag=19.17+/-0.35
dist=139.5 REFID=43
*** The position of this source is inconsistent with the XRT position.
The position is 107.6 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 1 1 0 0 0
Found 7 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
233.0417 0.8050 5.7 -1 USNO-B1 12.96 11.71 12.27 *
233.0392 0.8053 11.3 -1 USNO-B1 21.60 19.35 20.35
233.0442 0.8086 10.5 -1 USNO-B1 19.60 18.83 19.17
233.0414 0.8041 8.9 -1 GSC2.3 99.99 99.99 99.99
233.0417 0.8050 5.5 -1 GSC2.3 12.02 12.96 99.99 *
233.0443 0.8086 10.8 -1 GSC2.3 19.92 19.86 99.99
233.0419 0.8094 10.5 -1 GSC2.3 20.42 99.99 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 14 in the list of sources is a candidate afterglow for 1347265_g336 with 3x3 stamp
ra=233.07239 (15:32:17.37) dec=0.73669 (+00:44:12.1) +/- 1.1" mag=19.36+/-0.35
dist=316.1 REFID=46
*** The position of this source is inconsistent with the XRT position.
The position is 171.5 arc sec from the BAT position.
src: 14 distr. of nearby unmatched sources: 0 0 0 0 0
Found 4 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
233.0718 0.7363 2.6 -1 USNO-B1 15.34 14.34 14.78 *
233.0766 0.7331 19.9 -1 USNO-B1 18.10 17.13 17.56
233.0719 0.7365 2.0 -1 GSC2.3 14.50 15.44 99.99 *
233.0766 0.7333 19.3 -1 GSC2.3 17.46 18.39 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
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 17.64, XRT distances < 6.25",
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 2 of trigger 1347265
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB250905 (Swift/BAT trigger 1347265) at 02:09:54 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 104 seconds with the U filter starting
300 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 none of the
XRT error circle. 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 0.054.
------- notes for trigger 1347265 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250905d10h54m10s179149usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1347265
-expid=778731331 -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/1347265/
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 778731331.30902 or about 2025:249:02:15:26 UT
Found 784 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 50 sources in
srclist catalog. Found 7 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.64 mag.
Found 4 source(s) in Genie image catalog. Found 1 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.96 mag. Found 78 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 8% of the
Genie image region.
Genie image analysis:
Found 7770.8 counts in the large background region of 6312.0 pixels or a rate
of 1.231 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 19.19 mag. for a
4-arcsec aperture. The closest srclist source has ra= 233.0060 dec= 0.7878
mag=17.36 sep=21.21". The closest Genie source has ra= 233.0285 dec= 0.7944
mag=19.18 sep=82.54".
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?
778731331 299 U srclist found no candidates.
778731331 299 U image found no candidates.
List afterglow candidates for other finding charts.
778731171 139 WHITE srclist found no candidates.
778731171 139 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 0.79369
GRB_ERROR: 6.25
GRB_RA: 233.00558
IMAGE_START_TIME: 02:15:26
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT