image overlap message for exposure 1 of trigger 1186386
uvot_overlap.pl vrs. 2010-12-20b fem started at 230821d15h02m02s038540usUT
The observation of trigger 1186386 started 2023-08-21T14:55:20.0
Examining file 1186386_g714322520_uvot_sky_image.fits
The exposure ID is 714322520
The exposure time is 249.924 (seconds)
The filter is U.
*** Warning -- no aspect solution was applied to the image.
consequently the calculated overlaps are questionable.
The uvot region is centered at (299.7280,35.3742) with a roll angle of 322.7
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
Could not find the location of a BAT error circle
Could not find the location of an XRT error circle
image afterglow message for exposure 1 of trigger 1186386
find_uvot_ag.pl vrs. 2023-04-25a fem started at 230821d15h02m03s172838usUT
Observation start time is 2023-08-21T14:55:20.0
Examining file 1186386_g714322520_uvot_sources_image.fits
The exposure ID is 714322520
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 13 detected source(s) for 1186386_g714322520
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 299.7285 , 35.3746 with radius 2.31 arc min.
n_usno: 293 n_gsc: 424
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 9.62032
RA DEC Mag Color
bright star 0: 299.73604 (19:58:56.65) 35.36957 (+35:22:10.4) 11.14 USNO-V
bright star 1: 299.70610 (19:58:49.46) 35.35433 (+35:21:15.6) 9.62 USNO-V
*** WARNING -- no XRT distances are available.
Found 13 entries without IDs and 0 entries that are acceptable afterglow candidates for 1186386_g714322520.
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.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=297.2770 (19:49:06.48) DEC=36.0590 (+36:03:32.4)
XRT distances are as reported in catalog file.
*** WARNING 100 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to BAT position is no. 10:
ra=299.72663 dec= 35.38966 +/- 0.8" mag=17.09+/-0.15 dist=7582.3 REFID=11 flag=0
There are 46822.008 counts in the bkg source region of 5732.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.169 counts/pixel (5-sig UL in 4" is 19.32 mag) for 1186386_g714322520
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.32, 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: 1186386_714322520_230821d15h02m03s172838usUT_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(299.7280,35.3742,45")
fk5;-circle(299.733336579442,35.3760248759101,6")
fk5;-circle(299.734789518538,35.3731067064064,6")
fk5;-circle(299.731420887804,35.3856424210961,6")
fk5;-circle(299.73258683312,35.3798622514596,6")
fk5;-circle(299.733829498977,35.3800289051069,6")
fk5;-circle(299.722296879914,35.3715328269298,6")
image paragraph message for exposure 1 of trigger 1186386
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.
------ Start for Possible Stand-alone Circular ----
In response to GRB230821 (Swift/BAT trigger 1186386) at 14:52:00 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
168 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
extinction.
------- notes for trigger 1186386 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230821d15h02m06s534747usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1186386
-expid=714322520 -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/1186386/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 714322520.04744 or about 2023:233:14:55:15 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 13 source(s) in Genie image catalog. Found 13 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.32 mag. Found 424 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
55% 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?
714322520 168 U srclist data are not available.
714322520 168 U image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------