image overlap message for exposure 2 of trigger 1105560
uvot_overlap.pl vrs. 2010-12-20b fem started at 220506d12h38m12s178759usUT
The observation of trigger 1105560 started 2022-05-06T12:24:07.9
Examining file 1105560_g908_uvot_sky_image.fits
The exposure ID is 673532647
The exposure time is 54.295 (seconds)
The filter is WHITE.
*** Warning -- found 9516 null pixels in the image.
The uvot region is centered at (300.0657,34.8832) with a roll angle of 68.8
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 (300.0630,34.9060) with a radius of 3.000 arc min
This is 1.372 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 6.17 sq. arc min or 0.22 of the BAT error circle
The XRT error circle is centered at (300.0608,34.8807) with a radius of 0.097 arc min
This is 0.287 arc min from the center of the uvot region
The area of the XRT error circle is 0.029 sq. arc min
The UVOT/XRT overlap is 0.029 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1105560
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220506d12h38m13s791077usUT
Observation start time is 2022-05-06T12:24:07.9
Examining file 1105560_g908_uvot_sources_image.fits
The exposure ID is 673532647
The exposure is 54.295 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 1105560_g908
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 300.0654 , 34.8910 with radius 2.00 arc min.
n_usno: 100 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 1105560_g908.
Acceptable entries have no ID, XRT distances < 14.5", 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=300.0630 (20:00:15.12) DEC=34.9060 (+34:54:21.6)
XRT distances are from RA=300.0608 (20:00:14.59) DEC=34.8807 (+34:52:50.5)
*** WARNING 100 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 0:
ra=300.06537 dec= 34.89098 +/- 1.1" mag=13.04+/-0.35 dist=39.4 REFID=1 flag=24
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
300.0668 34.8803 17.9 -1 USNO-B1 18.73 16.95 17.74
300.0553 34.8797 16.6 -1 USNO-B1 17.28 15.95 16.54
The closest star is 16.61" away.
List UVOT sources within 20" of the XRT position:
There are -1.1137074E+06 counts in the bkg source region of 4833.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is -230.438 counts/pixel for 1105560_g908
There are -1.4146372E+05 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is -714.463 counts/pixel for 1105560_g908
There are -2.5663112E+05 counts in the xrt_bkg source region of 842.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is -304.788 counts/pixel for 1105560_g908
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 18.87, XRT distances < 14.5",
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: 1105560_673532647_220506d12h38m13s791077usUT_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(300.0657,34.8832,45")
fk5;-circle(300.065367329508,34.8909819958729,6")
Region file: 1105560_673532647_220506d12h38m13s791077usUT_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(300.0608,+34.8807,8")
Region file: 1105560_673532647_220506d12h38m13s791077usUT_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(300.0608,+34.8807,25")
fk5;-circle(300.0608,+34.8807,15")
image paragraph message for exposure 2 of trigger 1105560
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.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB220506 (Swift/BAT trigger 1105560) at 12:08:58 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 54 seconds with the White filter
starting 879 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 large, but uncertain, extinction
expected.
------- notes for trigger 1105560 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220506d12h38m16s444684usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1105560
-expid=673532647 -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/1105560/
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. Unreliable extinction found for
xrt position. The Genie image appears to be DAMAGED with a min. value of
-4157.381836.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 673532647.91304 or about 2022:126:12:24:02 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 1 source(s) in Genie image catalog. Found 1 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 18.87 mag. Found 96 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 16% of the
Genie image region. The Genie image is INCOMPLETE with 9516 null pixels.
The closest Genie source has ra= 300.0654 dec= 34.8910 mag=13.04 sep=39.40".
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?
673532647 879 WHITE srclist data are not available.
673532647 879 WHITE image found no candidates.
List afterglow candidates for other finding charts.
673531958 190 ? srclist data are not available.
673531958 190 WHITE image found no candidates.
------- Tokens for Quick GCN -------