image overlap message for exposure 1 of trigger 1513082
uvot_overlap.pl vrs. 2010-12-20b fem started at 260924d22h17m59s147045usUT
The observation of trigger 1513082 started 2026-09-24T01:16:06.2
Examining file ./1513082_g157_uvot_sky_image.fits
The exposure ID is 811905366
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- no aspect solution was applied to the image.
consequently the calculated overlaps are questionable.
The uvot region is centered at (133.7690,12.0459) with a roll angle of 101.4
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 (133.7537,12.0408) with a radius of 1.000 arc min
This is 0.948 arc min from the center of the uvot region
The area of the BAT error circle is 3.14 sq. arc min
The UVOT/BAT overlap is 2.47 sq. arc min or 0.79 of the BAT error circle
The XRT error circle is centered at (133.7629,12.0432) with a radius of 0.067 arc min
This is 0.396 arc min from the center of the uvot region
The area of the XRT error circle is 0.014 sq. arc min
The UVOT/XRT overlap is 0.014 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1513082
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260924d22h18m00s684595usUT
Observation start time is 2026-09-24T01:16:06.2
Examining file ./1513082_g157_uvot_sources_image.fits
The exposure ID is 811905366
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 4 detected source(s) for 1513082_g157
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 133.7738 , 12.0364 with radius 2.15 arc min.
n_usno: 47 n_gsc: 33
Bright star catalog has no entries brighter than 12 mag
Found 4 entries without IDs and 4 entries that are acceptable afterglow candidates for 1513082_g157.
Acceptable entries have no ID, XRT distances < 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=133.7537 (08:55:00.90) DEC=12.0408 (+12:02:27.0)
XRT distances are from RA=133.7629 (08:55:03.10) DEC=12.0432 (+12:02:35.4)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1513082_g157 with genie
ra=133.76857 (08:55:04.46) dec=12.02034 (+12:01:13.2) +/- 0.8" mag=18.36+/-0.16
dist=84.6 REFID=1 major=1.3 minor=1.1 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 90.4 arc sec from the BAT position.
This source is near the edge of image (0.915)
Found 2 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 12 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
133.7705 12.0171 13.5 -1 USNO-B1 17.73 16.95 17.30 *
133.7705 12.0171 13.6 -1 GSC2.3 17.07 17.58 17.23 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 20.25" or brighter than 12 mag
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1513082_g157 with genie
ra=133.77814 (08:55:06.75) dec=12.05239 (+12:03:08.6) +/- 0.7" mag=15.69+/-0.14
dist=63.0 REFID=2 major=0.9 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 95.4 arc sec from the BAT position.
Found 3 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
133.7802 12.0490 14.1 -1 USNO-B1 15.36 14.36 14.80
133.7795 12.0483 15.4 -1 GSC2.3 99.99 99.99 99.99
133.7802 12.0490 14.2 -1 GSC2.3 13.99 15.05 14.48
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1513082_g157 with genie
ra=133.78643 (08:55:08.74) dec=12.05102 (+12:03:03.7) +/- 0.7" mag=15.75+/-0.14
dist=87.4 REFID=3 major=0.9 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 120.7 arc sec from the BAT position.
Found 2 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
133.7884 12.0477 13.9 -1 USNO-B1 15.47 14.67 15.03
133.7884 12.0476 14.0 -1 GSC2.3 14.40 15.27 14.73
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1513082_g157 with genie
ra=133.76117 (08:55:02.68) dec=12.04629 (+12:02:46.6) +/- 0.7" mag=13.77+/-0.14
dist=12.8 REFID=4 major=1.2 minor=1.1 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 32.7 arc sec from the BAT position.
Found 5 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
133.7659 12.0465 16.5 -1 USNO-B1 21.13 19.34 20.13
133.7595 12.0419 16.9 -1 USNO-B1 21.38 20.13 20.68
133.7594 12.0435 11.9 -1 USNO-B1 20.74 19.79 20.21 *
133.7658 12.0463 16.3 -1 GSC2.3 19.01 21.19 19.10
133.7594 12.0428 13.9 -1 GSC2.3 19.38 21.95 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
Found 5 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
133.7659 12.0465 15.7 -1 USNO-B1 21.13 19.34 20.13
133.7595 12.0419 12.9 -1 USNO-B1 21.38 20.13 20.68
133.7594 12.0435 12.4 -1 USNO-B1 20.74 19.79 20.21
133.7658 12.0463 15.2 -1 GSC2.3 19.01 21.19 19.10
133.7594 12.0428 12.3 -1 GSC2.3 19.38 21.95 99.99
The closest star is 12.30" away.
List UVOT sources within 20" of the XRT position:
Unmatched source ra=133.76117 (08:55:02.68) dec=12.04629 (+12:02:46.6) +/- 0.7" mag=13.77+/-0.14 dist=12.8 REFID=4 flag=0
There are 2.8851141E+05 counts in the bkg source region of 6088.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 47.390 counts/pixel (5-sig UL in 4" is 19.25 mag) for 1513082_g157
There are 9709.4873 counts in the xrt source region of 204.00000 pixels.
Rate in xrt region with 8 arcsec radius is 47.596 counts/pixel for 1513082_g157
There are 51940.930 counts in the xrt_bkg source region of 1220.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 42.575 counts/pixel (5-sig UL in 4" is 19.31 mag) for 1513082_g157
There are 2 candidate(s) outside XRT error circle with mag < 19.25
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.81, XRT distances < 10",
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: 1513082_811905366_260924d22h18m00s684595usUT_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(133.7690,12.0459,45")
fk5;-circle(133.778141832565,12.052393576634,6")
fk5;-circle(133.761172024751,12.046286175058,6")
Region file: 1513082_811905366_260924d22h18m00s684595usUT_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(133.76292,12.04317,8")
Region file: 1513082_811905366_260924d22h18m00s684595usUT_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(133.76292,12.04317,25")
fk5;-circle(133.76292,12.04317,15")
fk5;-circle(133.761172024751,12.046286175058,6")
image paragraph message for exposure 1 of trigger 1513082
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no aspect solution
SRCLIST PROBLEM: no srclist afterglow info
See notes for more details.
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB260924 (Swift/BAT trigger 1513082) at 01:13:28 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 123 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image processing
FAILED because of no aspect solution. Results from the list of sources
generated on-board are not available at this time. No correction has been made
for the expected extinction corresponding to E(B-V) of 0.041.
------- notes for trigger 1513082 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 260924d22h18m04s532611usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1513082
-expid=811905366 -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/1513082/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 811905366.18638 or about 2026:267:01:16:01 UT
No information found about the number of stars in the star catalog for srclist
region.
THERE IS NO ASPECT SOLUTION for the image data.
Found 4 source(s) in Genie image catalog. 1 source(s) are within 20.0" of the
xrt position. Found 4 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
19.81 mag. Found 43 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 6% of the Genie image region.
Found 1 Genie source(s) within 20.0" of the XRT position. The brightest such
source has ra= 133.7612 dec= 12.0463 mag=13.77 sep=12.80". The closest Genie
source has ra= 133.7612 dec= 12.0463 mag=13.77 sep=12.80".
This paragraph is only useful if the XRT position is grossly wrong. There are 2
candidate(s) in the image data with mag < 19.25 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=133.77814
(08:55:06.75), DEC=12.05239 (+12:03:08.6) (J2000). It has a mag of 15.69. It is
95.4" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 123 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 08:55:06.75 = 133.77814
DEC(J2000) = +12:03:08.6 = 12.05239
with a 90%-confidence error radius of about 0.74 arc sec. The estimated
magnitude is 15.69 with a 1-sigma error of about 0.14. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.041.
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?
811905366 123 WHITE srclist data are not available.
811905366 123 WHITE image found no candidates.
List afterglow candidates for other finding charts.
811905580 337 ? srclist data are not available.
811905580 337 U image found no candidates.
------- Tokens for Quick GCN -------