image overlap message for exposure 2 of trigger 1439093
uvot_overlap.pl vrs. 2010-12-20b fem started at 260113d10h35m51s217731usUT
The observation of trigger 1439093 started 2026-01-13T10:19:41.1
Examining file 1439093_g334_uvot_sky_image.fits
The exposure ID is 789992381
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (357.3657,9.0377) with a roll angle of 242.5
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 (357.3720,9.0410) with a radius of 3.000 arc min
This is 0.424 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 7.17 sq. arc min or 0.25 of the BAT error circle
Could not find the location of an XRT error circle
image afterglow message for exposure 2 of trigger 1439093
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260113d10h35m52s062997usUT
Observation start time is 2026-01-13T10:19:41.1
Examining file 1439093_g334_uvot_sources_image.fits
The exposure ID is 789992381
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 0 detected source(s) for 1439093_g334
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 357.3585 , 9.0364 with radius 2.00 arc min.
n_usno: 22 n_gsc: 15
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1439093_g334.
Acceptable entries have no ID, BAT distance < 210" or XRT distance < 20", 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=357.3720 (23:49:29.28) DEC= 9.0410 (+09:02:27.6)
XRT distances are as reported in catalog file.
There are 59717.066 counts in the bkg source region of 6306.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 9.470 counts/pixel (5-sig UL in 4" is 19.24 mag) for 1439093_g334
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.24, BAT distances < 210",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Results are questionable because aspect solution FAILED.
Region file: 1439093_789992381_260113d10h35m52s062997usUT_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(357.3657,9.0377,45")
image paragraph message for exposure 2 of trigger 1439093
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB260113 (Swift/BAT trigger 1439093) at 10:14:06 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
297 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 25% of the
BAT 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 BAT
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
0.098.
------- notes for trigger 1439093 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 260113d10h35m53s040289usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1439093
-expid=789992381 -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/1439093/
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 789992381.1127 or about 0000:11701:10:19:45 UT
Found 318 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 27 sources in
srclist catalog. Found 2 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.56 mag.
Found 0 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 19.24 mag. Found 18 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 3% of the
Genie image region.
Genie image analysis:
Found 59717.1 counts in the large background region of 6306.0 pixels or a rate
of 9.470 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 19.03 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?
789992381 297 U srclist found no candidates.
789992381 297 U image found no candidates.
List afterglow candidates for other finding charts.
789992223 139 WHITE 357.42450 9.04688 19.08/18.7 187.9 srclist Yes
789992223 139 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 9.04100
GRB_ERROR: 200
GRB_RA: 357.37200
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT