image overlap message for exposure 2 of trigger 1417793
uvot_overlap.pl vrs. 2010-12-20b fem started at 251127d01h33m45s155659usUT
The observation of trigger 1417793 started 2025-11-26T19:16:11.3
Examining file ./1417793_g334_uvot_sky_image.fits
The exposure ID is 785877371
The exposure time is 249.935 (seconds)
The filter is U.
*** Warning -- found 21960 null pixels in the image.
The uvot region is centered at (99.9189,54.9915) with a roll angle of 54.4
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 (99.9100,54.9870) with a radius of 3.000 arc min
This is 0.407 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 2.72 sq. arc min or 0.10 of the BAT error circle
The XRT error circle is centered at (99.9412,54.9859) with a radius of 0.075 arc min
This is 0.837 arc min from the center of the uvot region
The area of the XRT error circle is 0.018 sq. arc min
The UVOT/XRT overlap is 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1417793
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251127d01h34m03s873483usUT
Observation start time is 2025-11-26T19:16:11.3
Examining file ./1417793_g334_uvot_sources_image.fits
The exposure ID is 785877371
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 0 detected source(s) for 1417793_g334
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 99.9042 , 54.9851 with radius 2.00 arc min.
n_usno: 58 n_gsc: 51
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.97856
RA DEC Mag Color
bright star 0: 99.90167 (06:39:36.40) 54.98605 (+54:59:09.8) 11.98 USNO-V
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1417793_g334.
Acceptable entries have no ID, XRT distances < 11.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=99.9100 (06:39:38.40) DEC=54.9870 (+54:59:13.2)
XRT distances are from RA=99.9412 (06:39:45.89) DEC=54.9859 (+54:59:09.2)
Found 2 entries in star catalog(s) within 20" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
99.9464 54.9828 15.5 -1 GSC2.3 20.36 99.99 99.99
99.9500 54.9882 20.0 -1 GSC2.3 18.18 20.00 18.83
The closest star is 15.47" away.
List UVOT sources within 20" of the XRT position:
There are 0.0000000 counts in the bkg source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt_bkg source region of 0.0000000 pixels.
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 18.32, XRT distances < 11.25",
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: 1417793_785877371_251127d01h34m03s873483usUT_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(99.9189,54.9915,45")
Region file: 1417793_785877371_251127d01h34m03s873483usUT_xrt.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(99.94121,54.98589,8")
Region file: 1417793_785877371_251127d01h34m03s873483usUT_xrt_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(99.94121,54.98589,25")
fk5;-circle(99.94121,54.98589,15")
image paragraph message for exposure 2 of trigger 1417793
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB251126 (Swift/BAT trigger 1417793) at 19:10:36 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 none of the
XRT error circle. 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 0.063.
------- notes for trigger 1417793 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 251127d01h34m08s306970usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1417793
-expid=785877371 -meonly -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/1417793/
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 785877371.34794 or about 2025:331:19:16:06 UT
Found 902 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 84 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 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 18.32 mag. Found 54 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 9% of the
Genie image region. The Genie image is INCOMPLETE with 21960 null pixels.
Found no Genie image background information. The number of srclist sources
filled the available telemetry. The weakest source detected was 18.71 mag. The
closest srclist source has ra= 99.9528 dec= 54.9836 mag=18.52 sep=25.29".
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?
785877371 297 U srclist found no candidates.
785877371 297 U image found no candidates.
List afterglow candidates for other finding charts.
785877159 85 WHITE srclist found no candidates.
785877159 85 WHITE image found no candidates.
------- Tokens for Quick GCN -------