srclist overlap message for exposure 2 of trigger 1262764
uvot_overlap.pl vrs. 2010-12-20b fem started at 241027d07h25m45s341914usUT
The observation of trigger 1262764 started 2024-10-26T22:48:37.2
Examining file ./1262764_g364_uvot_sky_srclist.fits
The exposure ID is 751675717
The exposure time is undefined.
The filter is U.
The uvot region is centered at (293.4140,57.9780) with a roll angle of 256.2
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 (293.4230,57.9800) with a radius of 3.000 arc min
This is 0.309 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 (293.4006,57.9861) with a radius of 0.037 arc min
This is 0.647 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 2 of trigger 1262764
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241027d07h26m04s869645usUT
Observation start time is 2024-10-26T22:48:37.2
Examining file ./1262764_g364_uvot_catalog_srclist.fits
The exposure ID is 751675717
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 1262764_g364
*** 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 1262764_g364 has mag 18.52
Aspect correction adds -0.00156 degrees (-0.374 sec of time = -2.98 arc sec) to RA
Aspect correction adds 0.00010 degrees ( 0.34 arcsec) to Dec
Total aspect correction is 3.00 arcsec
Star catalogs centered at 293.4259 , 57.9754 with radius 8.52 arc min.
n_usno: 2018 n_gsc: 2749
*** WARNING -- bright star catalog has 12 entries brighter than 12 mag
The brightest has mag 9.09848
RA DEC Mag Color
bright star 0: 293.51267 (19:34:03.04) 57.99130 (+57:59:28.7) 10.43 USNO-V
bright star 1: 293.32605 (19:33:18.25) 57.99635 (+57:59:46.9) 10.44 USNO-V
bright star 2: 293.62036 (19:34:28.89) 58.00024 (+58:00:00.9) 10.88 GSC-F
bright star 3: 293.57351 (19:34:17.64) 58.05911 (+58:03:32.8) 9.10 USNO-V
bright star 4: 293.65018 (19:34:36.04) 58.00303 (+58:00:10.9) 11.79 USNO-R
bright star 5: 293.61099 (19:34:26.64) 57.90161 (+57:54:05.8) 10.27 GSC-F
bright star 6: 293.48047 (19:33:55.31) 57.85297 (+57:51:10.7) 10.94 GSC-F
bright star 7: 293.32330 (19:33:17.59) 57.96827 (+57:58:05.8) 11.63 GSC-F
bright star 8: 293.41043 (19:33:38.50) 58.03043 (+58:01:49.6) 11.80 GSC-F
bright star 9: 293.50064 (19:34:00.15) 57.91615 (+57:54:58.1) 11.93 GSC-F
bright star 10: 293.59814 (19:34:23.55) 57.96783 (+57:58:04.2) 11.79 GSC-F
bright star 11: 293.63654 (19:34:32.77) 57.90411 (+57:54:14.8) 11.68 GSC-F
Mean distance difference (CAT_DELTA) for 159 matched entries is 0.694" for 1262764_g364
Mean and std. dev of mag. difference (MAG_DELTA) are 1.137 and 0.906 for 1262764_g364
Found 41 entries without IDs and 2 entries that are acceptable afterglow candidates for 1262764_g364.
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.
36 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=293.4230 (19:33:41.52) DEC=57.9800 (+57:58:48.0)
XRT distances are from RA=293.4006 (19:33:36.14) DEC=57.9861 (+57:59:10.0)
-----------------
Entry 13 in the list of sources is a candidate afterglow for 1262764_g364 with 3x3 stamp
ra=293.37573 (19:33:30.18) dec=58.00237 (+58:00:08.5) +/- 1.1" mag=15.39+/-0.35
dist=75.3 REFID=41
*** The position of this source is inconsistent with the XRT position.
The position is 122.3 arc sec from the BAT position.
src: 13 srclist_match has ID
src: 13 distr. of nearby unmatched sources: 0 0 0 0 0
Found 11 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
293.3757 58.0018 1.9 -1 USNO-B1 12.61 11.89 12.21 *
293.3723 58.0011 8.1 -1 USNO-B1 20.17 99.99 99.99
293.3805 58.0061 16.4 -1 USNO-B1 20.21 18.52 19.27
293.3755 58.0058 12.4 -1 USNO-B1 16.45 15.05 15.67
293.3829 58.0021 13.7 -1 GSC2.3 99.99 22.21 99.99
293.3755 58.0017 2.4 -1 GSC2.3 12.58 12.81 99.99 *
293.3757 58.0018 1.9 -1 GSC2.3 99.99 99.99 12.27 *
293.3806 58.0060 16.0 -1 GSC2.3 17.86 19.95 99.99
293.3807 58.0061 16.4 -1 GSC2.3 18.01 20.08 18.56
293.3757 58.0057 11.9 -1 GSC2.3 14.62 15.81 99.99
293.3757 58.0058 12.2 -1 GSC2.3 14.90 15.91 15.23
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 52 in the list of sources is a candidate afterglow for 1262764_g364 with 1x1 stamp
ra=293.42233 (19:33:41.36) dec=57.92673 (+57:55:36.2) +/- 1.1" mag=18.52+/-0.35
dist=217.8 REFID=175
*** The position of this source is inconsistent with the XRT position.
The position is 191.8 arc sec from the BAT position.
src: 52 srclist_match has ID
src: 52 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
293.4219 57.9262 2.2 -1 USNO-B1 17.20 15.84 16.44 *
293.4227 57.9264 1.3 -1 GSC2.3 99.99 99.99 99.99 *
293.4219 57.9260 2.7 -1 GSC2.3 15.86 16.84 16.73 *
293.4219 57.9260 2.9 -1 GSC2.3 15.59 16.61 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 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
293.4040 57.9858 6.6 -1 USNO-B1 21.54 19.97 20.67
293.4037 57.9858 6.0 -1 USNO-B1 21.08 99.99 99.99
293.4042 57.9858 7.0 -1 GSC2.3 19.26 21.41 99.99
293.4041 57.9857 6.9 -1 GSC2.3 19.63 99.99 99.99
The closest star is 6.00" away.
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 < 5.5",
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 1262764
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB241026 (Swift/BAT trigger 1262764) at 22:42:32 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
330 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 100% 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
0.073.
------- notes for trigger 1262764 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 241027d07h26m10s178242usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1262764
-expid=751675717 -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/1262764/
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 751675717.24848 or about 2024:300:22:48:32 UT
Found 2749 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 26% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 41 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 17 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 20.37 mag. Found 253 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
27% of the Genie image region.
Genie image analysis:
Found 18357.2 counts in the large background region of 5594.0 pixels or a rate
of 3.282 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 19.62 mag. for a
4-arcsec aperture.
Found 632.1 counts in the XRT position region of 201.0 pixels or a rate of
3.145 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.082 +/- 0.110 (1-sigma) cps or
20.86 mag and a range from 19.93 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.413 cps or 19.10 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.52 mag. The closest
srclist source has ra= 293.3886 dec= 57.9843 mag=17.50 sep=23.67". The closest
Genie source has ra= 293.3932 dec= 57.9828 mag=18.91 sep=18.48".
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?
751675717 330 U srclist found no candidates.
751675717 330 U image found no candidates.
List afterglow candidates for other finding charts.
751675504 117 WHITE srclist found no candidates.
751675504 117 WHITE image found no candidates.
751676251 864 WHITE srclist found no candidates.
751676251 864 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 57.98611
GRB_ERROR: 5.5
GRB_RA: 293.40058
IMAGE_START_TIME: 22:48:32
MAGNITUDE: 19.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT