image overlap message for exposure 2 of trigger 1436759
uvot_overlap.pl vrs. 2010-12-20b fem started at 260111d09h21m44s868044usUT
The observation of trigger 1436759 started 2026-01-11T09:16:36.0
Examining file 1436759_g912_uvot_sky_image.fits
The exposure ID is 789815796
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 18023 null pixels in the image.
The uvot region is centered at (338.4779,4.4227) with a roll angle of 237.7
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (338.4840,4.4260) with a radius of 3.000 arc min
This is 0.414 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 at most 2.94 sq. arc min or 0.10 of the BAT error circle
Could not find the location of an XRT error circle
image afterglow message for exposure 2 of trigger 1436759
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260111d09h21m46s244396usUT
Observation start time is 2026-01-11T09:16:36.0
Examining file 1436759_g912_uvot_catalog_image.fits
The exposure ID is 789815796
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 1436759_g912
Aspect correction adds -0.00108 degrees (-0.259 sec of time = -3.87 arc sec) to RA
Aspect correction adds 0.00015 degrees ( 0.56 arcsec) to Dec
Total aspect correction is 3.91 arcsec
Star catalogs centered at 338.4651 , 4.4022 with radius 2.00 arc min.
n_usno: 28 n_gsc: 23
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 1 matched entries is 0.014" for 1436759_g912
Mean and std. dev of mag. difference (MAG_DELTA) are 0.735 and 0.000 for 1436759_g912
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1436759_g912.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
Magnitude criteria will be applied later.
BAT distances are from RA=338.4840 (22:33:56.16) DEC= 4.4260 (+04:25:33.6)
XRT distances are as reported in catalog file.
There are 11586.214 counts in the bkg source region of 511.00000 pixels.
Rate in bkg region from 0 to 45 arcsec is 22.674 counts/pixel (5-sig UL in 4" is 19.66 mag) for 1436759_g912
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.65, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1436759_789815796_260111d09h21m46s244396usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(338.4779,4.4227,45")
image paragraph message for exposure 2 of trigger 1436759
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB260111 (Swift/BAT trigger 1436759) at 09:01:23 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 875 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 10% of
the BAT 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
BAT 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
0.111.
------- notes for trigger 1436759 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 260111d09h21m47s280592usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1436759
-expid=789815796 -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1436759/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. No XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 789815796.04594 or about 0000:11699:09:16:40 UT
Found 561 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 36 sources in
srclist catalog. Found 1 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
Found 1 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 19.65 mag. Found 24 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 4% of the
Genie image region. The Genie image is INCOMPLETE with 18023 null pixels.
Genie image analysis:
Found 11586.2 counts in the large background region of 511.0 pixels or a rate
of 22.674 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 19.48 mag. for a
4-arcsec aperture.
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?
789815796 875 WHITE 338.48493 4.47300 19.54/18.7 169.2 srclist Yes
789815796 875 WHITE image found no candidates.
List afterglow candidates for other finding charts.
789815092 171 U srclist found no candidates.
789815092 171 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 4.42600
GRB_ERROR: 200
GRB_RA: 338.48400
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT