srclist overlap message for exposure 1 of trigger 1417793
uvot_overlap.pl vrs. 2010-12-20b fem started at 251127d01h33m43s421267usUT
The observation of trigger 1417793 started 2025-11-26T19:12:39.1
Examining file ./1417793_g122_uvot_sky_srclist.fits
The exposure ID is 785877159
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (99.9223,54.9909) with a roll angle of 54.4
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 (99.9100,54.9870) with a radius of 3.000 arc min
This is 0.485 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 (99.9412,54.9859) with a radius of 0.075 arc min
This is 0.717 arc min from the center of the uvot region
The area of the XRT error circle is 0.018 sq. arc min
The UVOT/XRT overlap is 0.018 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1417793
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251127d01h33m45s880742usUT
Observation start time is 2025-11-26T19:12:39.1
Examining file ./1417793_g122_uvot_catalog_srclist.fits
The exposure ID is 785877159
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 132 detected source(s) for 1417793_g122
Aspect correction adds 0.00183 degrees (0.440 sec of time = 3.78 arc sec) to RA
Aspect correction adds -0.00001 degrees (-0.04 arcsec) to Dec
Total aspect correction is 3.78 arcsec
Star catalogs centered at 99.9207 , 54.9914 with radius 6.20 arc min.
n_usno: 466 n_gsc: 444
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 9.74646
RA DEC Mag Color
bright star 0: 99.90167 (06:39:36.40) 54.98605 (+54:59:09.8) 11.98 USNO-V
bright star 1: 99.98051 (06:39:55.32) 55.05947 (+55:03:34.1) 10.61 USNO-V
bright star 2: 99.77666 (06:39:06.40) 55.04173 (+55:02:30.2) 9.75 USNO-V
Mean distance difference (CAT_DELTA) for 79 matched entries is 0.667" for 1417793_g122
Mean and std. dev of mag. difference (MAG_DELTA) are 1.363 and 0.803 for 1417793_g122
Found 53 entries without IDs and 3 entries that are acceptable afterglow candidates for 1417793_g122.
Acceptable entries have no ID, XRT distances < 11.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
49 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=99.9100 (06:39:38.40) DEC=54.9870 (+54:59:13.2)
XRT distances are from RA=99.9412 (06:39:45.89) DEC=54.9859 (+54:59:09.2)
*** WARNING 40 per cent of entries have no IDs.
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1417793_g122 with 3x3 stamp
ra=99.89620 (06:39:35.09) dec=54.97538 (+54:58:31.4) +/- 1.1" mag=19.93+/-0.35
dist=100.4 REFID=125
*** The position of this source is inconsistent with the XRT position.
The position is 51.8 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 0 0 0 0 0
Found 2 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
99.8963 54.9760 2.1 -1 USNO-B1 18.71 16.80 17.65 *
99.8963 54.9760 2.1 -1 GSC2.3 17.07 18.52 18.20 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 9 in the list of sources is a candidate afterglow for 1417793_g122 with 3x3 stamp
ra=99.89451 (06:39:34.68) dec=54.96785 (+54:58:04.2) +/- 1.1" mag=19.65+/-0.35
dist=116.3 REFID=108
*** The position of this source is inconsistent with the XRT position.
The position is 76.9 arc sec from the BAT position.
src: 9 srclist_match has ID
src: 9 distr. of nearby unmatched sources: 0 0 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
99.9024 54.9692 17.0 -1 USNO-B1 18.24 17.25 17.69
99.8942 54.9691 4.7 -1 USNO-B1 16.16 15.05 15.55
99.8902 54.9669 9.6 -1 USNO-B1 99.99 19.84 99.99
99.9025 54.9691 17.1 -1 GSC2.3 17.36 18.12 17.90
99.8943 54.9690 4.0 -1 GSC2.3 14.85 16.86 15.43
99.8945 54.9683 1.6 -1 GSC2.3 99.99 17.89 99.99 *
99.8902 54.9667 9.8 -1 GSC2.3 19.75 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 40 in the list of sources is a candidate afterglow for 1417793_g122 with 3x3 stamp
ra=99.98646 (06:39:56.75) dec=55.02095 (+55:01:15.4) +/- 1.1" mag=20.14+/-0.35
dist=157.0 REFID=122
*** The position of this source is inconsistent with the XRT position.
The position is 198.0 arc sec from the BAT position.
src: 40 distr. of nearby unmatched sources: 0 0 0 0 0
Found 5 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
99.9827 55.0191 10.3 -1 USNO-B1 20.37 18.66 19.42
99.9868 55.0215 2.2 -1 USNO-B1 18.34 17.44 17.83 *
99.9827 55.0190 10.5 -1 GSC2.3 18.38 20.14 18.80
99.9869 55.0215 2.1 -1 GSC2.3 17.52 18.33 17.99 *
99.9897 55.0252 16.6 -1 GSC2.3 20.36 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
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 < 11.25",
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 1417793
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB251126 (Swift/BAT trigger 1417793) at 19:10:36 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 85 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 mag. No correction has been made for the expected
extinction corresponding to E(B-V) of 0.063.
------- notes for trigger 1417793 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 251127d01h33m54s059679usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1417793
-expid=785877159 -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/1417793/
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 785877159.10768 or about 2025:331:19:12:34 UT
Found 462 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 132 sources in
srclist catalog. Found 53 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 5 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 20.87 mag. Found 95 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 12207 null pixels.
Genie image analysis:
Found 23312.2 counts in the large background region of 3490.0 pixels or a rate
of 6.680 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 20.14 mag. for a
4-arcsec aperture. The closest srclist source has ra= 99.9525 dec= 54.9834
mag=18.51 sep=25.09". The closest Genie source has ra= 99.9400 dec= 55.0044
mag=18.25 sep=66.69".
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?
785877159 85 WHITE srclist found no candidates.
785877159 85 WHITE image found no candidates.
List afterglow candidates for other finding charts.
785877371 297 U srclist found no candidates.
785877371 297 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 54.98589
GRB_ERROR: 11.25
GRB_RA: 99.94121
IMAGE_START_TIME: 19:12:34
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT