srclist overlap message for exposure 2 of trigger 1328546
uvot_overlap.pl vrs. 2010-12-20b fem started at 250628d04h49m28s349873usUT
The observation of trigger 1328546 started 2025-06-28T01:02:14.2
Examining file ./1328546_g377_uvot_sky_srclist.fits
The exposure ID is 772765334
The exposure time is undefined.
The filter is U.
The uvot region is centered at (38.5593,-38.0742) with a roll angle of 52.4
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 (38.5510,-38.0810) with a radius of 3.000 arc min
This is 0.566 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 (38.5531,-38.0789) with a radius of 0.040 arc min
This is 0.408 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 1328546
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250628d04h49m38s672370usUT
Observation start time is 2025-06-28T01:02:14.2
Examining file ./1328546_g377_uvot_catalog_srclist.fits
The exposure ID is 772765334
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 28 detected source(s) for 1328546_g377
Aspect correction adds 0.00149 degrees (0.358 sec of time = 4.22 arc sec) to RA
Aspect correction adds -0.00058 degrees (-2.07 arcsec) to Dec
Total aspect correction is 4.70 arcsec
Star catalogs centered at 38.5703 , -38.0851 with radius 4.53 arc min.
n_usno: 131 n_gsc: 186
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.41492
RA DEC Mag Color
bright star 0: 38.52811 (02:34:06.75) -38.06879 (-38:04:07.7) 10.41 USNO-V
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.532" for 1328546_g377
Mean and std. dev of mag. difference (MAG_DELTA) are 1.293 and 1.220 for 1328546_g377
Found 21 entries without IDs and 1 entries that are acceptable afterglow candidates for 1328546_g377.
Acceptable entries have no ID, XRT distances < 6", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
20 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=38.5510 (02:34:12.24) DEC=-38.0810 (-38:04:51.6)
XRT distances are from RA=38.5531 (02:34:12.75) DEC=-38.0789 (-38:04:44.2)
*** WARNING 75 per cent of entries have no IDs.
-----------------
Entry 21 in the list of sources is a candidate afterglow for 1328546_g377 with 5x5 stamp
ra=38.58618 (02:34:20.68) dec=-38.07286 (-38:04:22.3) +/- 1.1" mag=18.92+/-0.35
dist=96.2 REFID=28
*** The position of this source is inconsistent with the XRT position.
The position is 103.9 arc sec from the BAT position.
src: 21 distr. of nearby unmatched sources: 0 0 0 1 0
Found 4 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
38.5806 -38.0743 16.7 -1 USNO-B1 21.47 19.74 20.51
38.5882 -38.0687 16.0 -1 USNO-B1 17.81 17.38 17.57
38.5805 -38.0743 16.9 -1 GSC2.3 19.56 21.56 99.99
38.5883 -38.0687 15.9 -1 GSC2.3 17.75 17.97 99.99
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, XRT distances < 6",
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 1328546
------ Start for Possible Stand-alone Circular ----
In response to GRB250628 (Swift/BAT trigger 1328546) at 00:55:56 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
341 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
0.023.
------- notes for trigger 1328546 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250628d04h49m40s769769usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1328546
-expid=772765334 -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/1328546/
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 772765334.2085 or about 2025:180:01:02:09 UT
Found 186 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 28 sources in
srclist catalog. Found 21 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 1 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 19.66 mag. Found 52 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 9% of the
Genie image region.
Genie image analysis:
Found 76858.4 counts in the large background region of 6307.0 pixels or a rate
of 12.186 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 18.90 mag. for a
4-arcsec aperture.
Found 2471.1 counts in the XRT position region of 198.0 pixels or a rate of
12.480 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.201 +/- 0.214 (1-sigma) cps or
19.88 mag and a range from 19.09 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.843 cps or 18.32 mag. The closest srclist source has ra= 38.5318
dec= -38.0704 mag=17.88 sep=67.70". The closest Genie source has ra= 38.5337
dec= -38.0698 mag=14.39 sep=64.28".
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?
772765334 341 U srclist found no candidates.
772765334 341 U image found no candidates.
List afterglow candidates for other finding charts.
772765122 129 WHITE srclist found no candidates.
772765122 129 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -38.07894
GRB_ERROR: 6
GRB_RA: 38.55312
IMAGE_START_TIME: 01:02:09
MAGNITUDE: 18.3
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT