image overlap message for exposure 1 of trigger 1186291
uvot_overlap.pl vrs. 2010-12-20b fem started at 230820d19h24m39s199879usUT
The observation of trigger 1186291 started 2023-08-20T19:15:00.1
Examining file 1186291_g323_uvot_sky_image.fits
The exposure ID is 714251700
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 (84.3256,22.9890) with a roll angle of 87.6
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 (84.3210,22.9880) with a radius of 3.000 arc min
This is 0.260 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 1 of trigger 1186291
find_uvot_ag.pl vrs. 2023-04-25a fem started at 230820d19h24m40s260618usUT
Observation start time is 2023-08-20T19:15:00.1
Examining file 1186291_g323_uvot_sources_image.fits
The exposure ID is 714251700
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 5 detected source(s) for 1186291_g323
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 84.3282 , 22.9863 with radius 2.20 arc min.
n_usno: 98 n_gsc: 121
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Found 5 entries without IDs and 5 entries that are acceptable afterglow candidates for 1186291_g323.
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=84.3210 (05:37:17.04) DEC=22.9880 (+22:59:16.8)
XRT distances are as reported in catalog file.
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1186291_g323 with genie
ra=84.31369 (05:37:15.29) dec=22.97278 (+22:58:22.0) +/- 0.9" mag=19.30+/-0.23
dist=59.9 REFID=1 major=1.1 minor=0.4 flag=0
This source is near the edge of image (0.879)
Found 6 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
84.3179 22.9725 13.8 -1 USNO-B1 99.99 19.51 99.99 *
84.3142 22.9723 2.3 -1 USNO-B1 18.83 16.14 17.33 *
84.3137 22.9696 11.6 -1 USNO-B1 20.27 18.68 19.39 *
84.3179 22.9725 13.8 -1 GSC2.3 19.71 99.99 99.99 *
84.3143 22.9723 2.6 -1 GSC2.3 16.72 18.57 17.34 *
84.3137 22.9695 11.8 -1 GSC2.3 18.88 20.93 99.99 *
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 1186291_g323 with genie
ra=84.34199 (05:37:22.08) dec=22.99991 (+22:59:59.7) +/- 0.8" mag=18.63+/-0.18
dist=81.7 REFID=2 major=1.1 minor=0.7 flag=0
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
84.3416 22.9966 12.1 -1 USNO-B1 18.75 16.28 17.37 *
84.3417 22.9965 12.2 -1 GSC2.3 16.75 18.84 17.29 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1186291_g323 with genie
ra=84.31118 (05:37:14.68) dec=22.99890 (+22:59:56.0) +/- 0.8" mag=18.23+/-0.16
dist=51.0 REFID=3 major=1.2 minor=1.0 flag=0
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
84.3135 23.0014 11.8 -1 USNO-B1 19.13 17.53 18.24 *
84.3136 23.0013 11.8 -1 GSC2.3 17.83 19.38 18.42 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1186291_g323 with genie
ra=84.34516 (05:37:22.84) dec=22.99186 (+22:59:30.7) +/- 0.8" mag=17.20+/-0.15
dist=81.3 REFID=4 major=1.3 minor=1.2 flag=0
Found 6 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
84.3464 22.9874 16.4 -1 USNO-B1 99.99 19.02 99.99
84.3488 22.9947 15.8 -1 USNO-B1 20.35 18.21 19.16
84.3422 22.9924 9.8 -1 GSC2.3 99.99 99.99 99.99 *
84.3465 22.9869 18.3 -1 GSC2.3 19.34 99.99 99.99
84.3497 22.9885 19.3 -1 GSC2.3 20.47 22.18 99.99
84.3489 22.9946 15.8 -1 GSC2.3 18.56 21.00 19.02
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1186291_g323 with genie
ra=84.33172 (05:37:19.61) dec=22.97584 (+22:58:33.0) +/- 0.9" mag=18.93+/-0.20
dist=56.4 REFID=5 major=2.1 minor=1.7 flag=0
Found 6 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
84.3275 22.9791 18.3 -1 USNO-B1 20.36 18.52 19.33
84.3281 22.9751 12.2 -1 USNO-B1 19.55 17.26 18.27 *
84.3341 22.9760 7.8 -1 USNO-B1 20.11 17.91 18.89 *
84.3276 22.9791 18.1 -1 GSC2.3 18.63 21.16 18.90
84.3282 22.9750 12.0 -1 GSC2.3 17.85 19.55 18.44 *
84.3341 22.9759 7.8 -1 GSC2.3 18.36 20.37 18.70 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
There are 3.9913206E+05 counts in the bkg source region of 6307.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 63.284 counts/pixel (5-sig UL in 4" is 19.10 mag) for 1186291_g323
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.09, 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: 1186291_714251700_230820d19h24m40s260618usUT_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(84.3256,22.9890,45")
image paragraph message for exposure 1 of trigger 1186291
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.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB230820 (Swift/BAT trigger 1186291) at 19:09:36 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 292 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 large, but uncertain, extinction expected.
------- notes for trigger 1186291 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230820d19h24m41s938219usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1186291
-expid=714251700 -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/1186291/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. No XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 714251700.12272 or about 2023:232:19:14:55 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 5 source(s) in Genie image catalog. Found 5 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.09 mag. Found 121 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 17% of the
Genie image region.
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?
714251700 292 WHITE srclist data are not available.
714251700 292 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------