srclist overlap message for exposure 1 of trigger 1262764
uvot_overlap.pl vrs. 2010-12-20b fem started at 241027d07h25m44s745258usUT
The observation of trigger 1262764 started 2024-10-26T22:45:04.2
Examining file ./1262764_g151_uvot_sky_srclist.fits
The exposure ID is 751675504
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (293.4129,57.9788) with a roll angle of 256.2
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 (293.4230,57.9800) with a radius of 3.000 arc min
This is 0.330 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 0.589 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 1262764
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241027d07h25m49s318029usUT
Observation start time is 2024-10-26T22:45:04.2
Examining file ./1262764_g151_uvot_catalog_srclist.fits
The exposure ID is 751675504
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 153 detected source(s) for 1262764_g151
Aspect correction adds -0.00144 degrees (-0.347 sec of time = -2.76 arc sec) to RA
Aspect correction adds 0.00047 degrees ( 1.68 arcsec) to Dec
Total aspect correction is 3.23 arcsec
Star catalogs centered at 293.4128 , 57.9740 with radius 6.42 arc min.
n_usno: 1110 n_gsc: 1543
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 10.43388
RA DEC Mag Color
bright star 0: 293.32605 (19:33:18.25) 57.99635 (+57:59:46.9) 10.44 USNO-V
bright star 1: 293.51267 (19:34:03.04) 57.99130 (+57:59:28.7) 10.43 USNO-V
bright star 2: 293.32330 (19:33:17.59) 57.96827 (+57:58:05.8) 11.63 GSC-F
bright star 3: 293.41043 (19:33:38.50) 58.03043 (+58:01:49.6) 11.80 GSC-F
bright star 4: 293.50064 (19:34:00.15) 57.91615 (+57:54:58.1) 11.93 GSC-F
bright star 5: 293.59814 (19:34:23.55) 57.96783 (+57:58:04.2) 11.79 GSC-F
Mean distance difference (CAT_DELTA) for 115 matched entries is 0.859" for 1262764_g151
Mean and std. dev of mag. difference (MAG_DELTA) are 1.189 and 1.227 for 1262764_g151
Found 46 entries without IDs and 2 entries that are acceptable afterglow candidates for 1262764_g151.
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.
41 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)
*** WARNING 30 per cent of entries have no IDs.
-----------------
Entry 29 in the list of sources is a candidate afterglow for 1262764_g151 with 3x3 stamp
ra=293.49060 (19:33:57.74) dec=57.99808 (+57:59:53.1) +/- 1.1" mag=18.47+/-0.35
dist=177.1 REFID=85
*** The position of this source is inconsistent with the XRT position.
The position is 142.8 arc sec from the BAT position.
src: 29 distr. of nearby unmatched sources: 0 0 0 0 0
Found 13 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
293.4892 57.9979 2.8 -1 USNO-B1 16.10 14.12 15.00 *
293.4961 57.9972 10.9 -1 USNO-B1 21.12 19.83 20.40
293.4932 58.0007 10.6 -1 USNO-B1 17.81 16.77 17.23
293.4920 58.0028 17.2 -1 USNO-B1 20.69 19.80 20.20
293.4877 57.9974 6.0 -1 GSC2.3 99.99 99.99 99.99
293.4893 57.9976 3.0 -1 GSC2.3 13.71 15.25 99.99 *
293.4893 57.9977 2.7 -1 GSC2.3 13.87 15.54 14.50 *
293.4965 57.9972 11.6 -1 GSC2.3 19.65 20.60 99.99
293.4932 58.0005 10.1 -1 GSC2.3 16.12 17.21 99.99
293.4933 58.0006 10.4 -1 GSC2.3 16.47 17.17 16.93
293.4970 57.9972 12.7 -1 GSC2.3 19.74 21.04 99.99
293.4923 58.0027 16.8 -1 GSC2.3 19.90 20.38 99.99
293.4925 58.0027 17.0 -1 GSC2.3 20.03 20.94 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 39 in the list of sources is a candidate afterglow for 1262764_g151 with 3x3 stamp
ra=293.47148 (19:33:53.15) dec=58.01604 (+58:00:57.7) +/- 1.1" mag=18.63+/-0.35
dist=172.9 REFID=107
*** The position of this source is inconsistent with the XRT position.
The position is 158.2 arc sec from the BAT position.
src: 39 distr. of nearby unmatched sources: 0 0 0 0 0
Found 9 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
293.4666 58.0133 13.4 -1 USNO-B1 19.48 18.73 19.06
293.4744 58.0143 8.3 -1 USNO-B1 15.67 14.18 14.84
293.4723 58.0165 2.2 -1 USNO-B1 14.48 12.71 13.49 *
293.4668 58.0132 13.6 -1 GSC2.3 17.62 18.71 99.99
293.4669 58.0132 13.4 -1 GSC2.3 17.96 18.87 18.45
293.4746 58.0141 9.3 -1 GSC2.3 14.44 15.23 99.99
293.4747 58.0142 9.1 -1 GSC2.3 14.57 15.47 14.95
293.4722 58.0165 2.2 -1 GSC2.3 12.70 14.04 99.99 *
293.4722 58.0165 2.3 -1 GSC2.3 12.90 14.17 13.18 *
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
293.4041 57.9857 6.9 -1 GSC2.3 19.63 99.99 99.99
293.4042 57.9858 7.0 -1 GSC2.3 19.26 21.41 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 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 1262764
------ 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 150 seconds with the White filter
starting 117 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 19.6 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 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 241027d07h25m53s285421usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1262764
-expid=751675504 -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 751675504.22486 or about 2024:300:22:44:59 UT
Found 1543 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 25% of the srclist region. Found 153 sources in
srclist catalog. Found 46 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 19 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 20.32 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 102186.7 counts in the large background region of 5527.0 pixels or a rate
of 18.489 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 19.59 mag. for a
4-arcsec aperture.
Found 3687.2 counts in the XRT position region of 198.0 pixels or a rate of
18.622 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.484 +/- 0.443 (1-sigma) cps or
20.39 mag and a range from 19.69 to 23.07 mag. The 3-sigma UL at the XRT
position is 1.814 cps or 18.96 mag. The closest srclist source has ra= 293.4105
dec= 57.9843 mag=18.96 sep=20.06". The closest Genie source has ra= 293.3934
dec= 57.9828 mag=19.21 sep=18.21".
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?
751675504 117 WHITE srclist found no candidates.
751675504 117 WHITE image found no candidates.
List afterglow candidates for other finding charts.
751675717 330 U srclist found no candidates.
751675717 330 U 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: white
GRB_DEC: 57.98611
GRB_ERROR: 5.5
GRB_RA: 293.40058
IMAGE_START_TIME: 22:44:59
MAGNITUDE: 19.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT