srclist overlap message for exposure 1 of trigger 1299967
uvot_overlap.pl vrs. 2010-12-20b fem started at 250331d16h42m20s872883usUT
The observation of trigger 1299967 started 2025-03-31T04:40:35.5
Examining file ./1299967_g174_uvot_sky_srclist.fits
The exposure ID is 765088835
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (80.9836,33.0258) with a roll angle of 263.1
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 (80.9930,33.0290) with a radius of 3.000 arc min
This is 0.510 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 (80.9562,33.0635) with a radius of 0.037 arc min
This is 2.647 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 1 of trigger 1299967
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250331d16h42m24s165264usUT
Observation start time is 2025-03-31T04:40:35.5
Examining file ./1299967_g174_uvot_catalog_srclist.fits
The exposure ID is 765088835
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 158 detected source(s) for 1299967_g174
Aspect correction adds -0.00172 degrees (-0.413 sec of time = -5.20 arc sec) to RA
Aspect correction adds 0.00013 degrees ( 0.46 arcsec) to Dec
Total aspect correction is 5.22 arcsec
Star catalogs centered at 80.9887 , 33.0368 with radius 6.39 arc min.
n_usno: 1325 n_gsc: 1451
*** WARNING -- bright star catalog has 7 entries brighter than 12 mag
The brightest has mag 10.58356
RA DEC Mag Color
bright star 0: 80.97893 (05:23:54.94) 33.08483 (+33:05:05.4) 11.10 USNO-V
bright star 1: 81.06420 (05:24:15.41) 33.03468 (+33:02:04.8) 11.01 USNO-V
bright star 2: 80.95491 (05:23:49.18) 32.97847 (+32:58:42.5) 10.97 USNO-V
bright star 3: 81.07416 (05:24:17.80) 33.00052 (+33:00:01.9) 10.58 USNO-V
bright star 4: 81.08017 (05:24:19.24) 33.00053 (+33:00:01.9) 11.31 USNO-V
bright star 5: 80.91955 (05:23:40.69) 33.04069 (+33:02:26.5) 11.92 GSC-V
bright star 6: 81.02129 (05:24:05.11) 33.13417 (+33:08:03.0) 11.90 GSC-V
Mean distance difference (CAT_DELTA) for 162 matched entries is 0.644" for 1299967_g174
Mean and std. dev of mag. difference (MAG_DELTA) are 1.314 and 0.580 for 1299967_g174
Found 4 entries without IDs and 1 entries that are acceptable afterglow candidates for 1299967_g174.
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.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=80.9930 (05:23:58.32) DEC=33.0290 (+33:01:44.4)
XRT distances are from RA=80.9562 (05:23:49.49) DEC=33.0635 (+33:03:48.5)
-----------------
Entry 53 in the list of sources is a candidate afterglow for 1299967_g174 with 3x3 stamp
ra=80.97739 (05:23:54.57) dec=33.02762 (+33:01:39.4) +/- 1.1" mag=14.85+/-0.35
dist=144.0 REFID=7
*** The position of this source is inconsistent with the XRT position.
The position is 47.4 arc sec from the BAT position.
src: 53 distr. of nearby unmatched sources: 1 0 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
80.9777 33.0295 6.7 -1 USNO-B1 99.99 18.43 99.99
80.9780 33.0273 2.2 -1 USNO-B1 13.50 12.32 12.85 *
80.9745 33.0240 15.6 -1 USNO-B1 19.16 17.45 18.21
80.9824 33.0277 15.0 -1 GSC2.3 19.98 99.99 99.99
80.9781 33.0273 2.4 -1 GSC2.3 12.21 12.99 12.63 *
80.9746 33.0240 15.3 -1 GSC2.3 18.00 19.33 18.32
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 4 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
80.9580 33.0618 8.2 -1 USNO-B1 15.79 14.65 15.15
80.9566 33.0655 7.4 -1 USNO-B1 20.43 19.25 19.77
80.9581 33.0617 8.5 -1 GSC2.3 14.54 15.55 15.11
80.9570 33.0652 6.6 -1 GSC2.3 19.41 21.32 99.99
The closest star is 6.57" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=80.95785 (05:23:49.88) dec=33.06173 (+33:03:42.2) +/- 1.1" mag=16.58+/-0.35 dist=8.0 REFID=25
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 1 of trigger 1299967
IMAGE PROBLEM: no overlap
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB250331 (Swift/BAT trigger 1299967) at 04:37:40 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 139 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 large, but
uncertain, extinction expected.
------- notes for trigger 1299967 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250331d16h42m33s267221usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1299967
-expid=765088835 -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/1299967/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 765088835.4895 or about 2025:091:04:40:30 UT
Found 1405 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 23% of the srclist region. Found 158 sources in
srclist catalog. Found 4 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 8 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 20.15 mag. Found 206 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 25% of the
Genie image region. The Genie image is INCOMPLETE with 13000 null pixels.
Genie image analysis:
Found 71357.7 counts in the large background region of 2838.0 pixels or a rate
of 25.144 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 19.42 mag. for a
4-arcsec aperture.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 80.9578 dec= 33.0617 mag=16.58 sep=7.97".
The closest srclist source has ra= 80.9578 dec= 33.0617 mag=16.58 sep=7.97".
The closest Genie source has ra= 80.9467 dec= 33.0605 mag=15.96 sep=30.64".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 139 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 05:23:49.88 = 80.95785
DEC(J2000) = +33:03:42.2 = 33.06173
with a 90%-confidence error radius of about 1.10 arc sec. This position is 7.97
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.58 with a 1-sigma error of about 0.35. No correction has been made for the
large, but uncertain, extinction expected.
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?
765088835 139 WHITE srclist found no candidates.
765088835 139 WHITE image found no candidates.
List afterglow candidates for other finding charts.
765089570 874 WHITE srclist found no candidates.
765089570 874 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 33.06347
GRB_ERROR: 5.5
GRB_RA: 80.95621
IMAGE_START_TIME: 04:40:30
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT