image overlap message for exposure 1 of trigger 1220161
uvot_overlap.pl vrs. 2010-12-20b fem started at 240315d10h04m03s393437usUT
The observation of trigger 1220161 started 2024-03-15T09:54:08.2
Examining file 1220161_g137_uvot_sky_image.fits
The exposure ID is 732189248
The exposure time is 43.575 (seconds)
The filter is WHITE.
*** Warning -- no aspect solution was applied to the image.
consequently the calculated overlaps are questionable.
*** Warning -- found 9125 null pixels in the image.
The uvot region is centered at (242.1856,-15.3962) with a roll angle of 98.5
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 (242.2670,-15.3950) with a radius of 3.000 arc min
This is 4.711 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 0.03 sq. arc min or 0.00 of the BAT error circle
Could not find the location of an XRT error circle
image afterglow message for exposure 1 of trigger 1220161
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240315d10h04m04s555480usUT
Observation start time is 2024-03-15T09:54:08.2
Examining file 1220161_g137_uvot_sources_image.fits
The exposure ID is 732189248
The exposure is 43.575 sec.
The bin size is 2 pixels
The filter is WHITE
There are 0 detected source(s) for 1220161_g137
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 242.2641 , -15.3948 with radius 2.00 arc min.
n_usno: 80 n_gsc: 67
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 1220161_g137.
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=242.2670 (16:09:04.08) DEC=-15.3950 (-15:23:42.0)
XRT distances are as reported in catalog file.
There are -3740.4902 counts in the bkg source region of 5103.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is -0.733 counts/pixel for 1220161_g137
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.19, 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: 1220161_732189248_240315d10h04m04s555480usUT_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(242.1856,-15.3962,45")
image paragraph message for exposure 1 of trigger 1220161
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no aspect solution, damaged image (negative pixel value)
SRCLIST PROBLEM: no srclist afterglow info
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB240315 (Swift/BAT trigger 1220161) at 09:51:50 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 44 seconds with the White filter
starting 104 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, damaged image (negative pixel value).
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 0.266.
------- notes for trigger 1220161 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240315d10h04m06s073394usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1220161
-expid=732189248 -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/1220161/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
The Genie image appears to be DAMAGED with a min. value of -34.440735.
No XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 732189248.22718 or about 2024:075:09:54:03 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 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 18.19 mag. Found 76 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 13% of the
Genie image region. The Genie image is INCOMPLETE with 9125 null pixels.
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?
732189248 104 WHITE srclist data are not available.
732189248 104 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------