image overlap message for exposure 2 of trigger 1082569
uvot_overlap.pl vrs. 2010-12-20b fem started at 211105d10h56m13s987897usUT
The observation of trigger 1082569 started 2021-11-05T10:42:13.7
Examining file 1082569_g889_uvot_sky_image.fits
The exposure ID is 657801733
The exposure time is 149.857 (seconds)
The filter is WHITE.
*** Warning -- found 965 null pixels in the image.
The uvot region is centered at (271.0731,41.3949) with a roll angle of 230.5
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 (271.0770,41.3990) with a radius of 3.000 arc min
This is 0.305 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 2 of trigger 1082569
find_uvot_ag.pl vrs. 2020-10-30 fem started at 211105d10h56m16s269956usUT
Observation start time is 2021-11-05T10:42:13.7
Examining file 1082569_g889_uvot_sources_image.fits
The exposure ID is 657801733
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 4 detected source(s) for 1082569_g889
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 271.0829 , 41.3972 with radius 2.25 arc min.
n_usno: 78 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.66366
RA DEC Mag Color
bright star 0: 271.12054 (18:04:28.93) 41.39776 (+41:23:51.9) 11.66 USNO-V
*** WARNING -- no XRT distances are available.
Found 4 entries without IDs and 4 entries that are acceptable afterglow candidates for 1082569_g889.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=271.0770 (18:04:18.48) DEC=41.3990 (+41:23:56.4)
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 1082569_g889 with genie
ra=271.09836 (18:04:23.61) dec=41.37984 (+41:22:47.4) +/- 1.0" mag=20.71+/-0.26
dist=89.9 REFID=1 major=2.1 minor=1.7 flag=0
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
271.0960 41.3793 6.7 -1 USNO-B1 18.30 17.30 17.75 *
271.1039 41.3790 15.3 -1 USNO-B1 21.16 19.91 20.46
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 1 in the list of sources is a candidate afterglow for 1082569_g889 with genie
ra=271.06746 (18:04:16.19) dec=41.41444 (+41:24:52.0) +/- 0.7" mag=13.71+/-0.14
dist=61.3 REFID=2 major=45.4 minor=1.8 flag=16 (aperture_incomplete)
This source is near the edge of image (0.925)
Found 1 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
271.0663 41.4165 8.0 -1 USNO-B1 19.77 18.49 19.06 *
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 2 in the list of sources is a candidate afterglow for 1082569_g889 with genie
ra=271.09307 (18:04:22.34) dec=41.41465 (+41:24:52.7) +/- 1.0" mag=20.56+/-0.24
dist=71.1 REFID=3 major=2.8 minor=1.2 flag=0
This source is near the edge of image (0.864)
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
271.0955 41.4126 9.7 -1 USNO-B1 20.15 17.88 18.89 *
271.0994 41.4122 19.2 -1 USNO-B1 18.06 16.63 17.27 *
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 3 in the list of sources is a candidate afterglow for 1082569_g889 with genie
ra=271.09701 (18:04:23.28) dec=41.40793 (+41:24:28.5) +/- 0.8" mag=19.07+/-0.16
dist=62.9 REFID=4 major=1.8 minor=0.7 flag=0
This source is near the edge of image (0.937)
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
271.0947 41.4070 7.0 -1 USNO-B1 17.86 16.95 17.35 *
271.0955 41.4126 17.5 -1 USNO-B1 20.15 17.88 18.89 *
271.0994 41.4122 16.7 -1 USNO-B1 18.06 16.63 17.27 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 20.25" or brighter than 12 mag
There are 76210.812 counts in the bkg source region of 6322.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 12.055 counts/pixel (5-sig UL in 4" is 20.00 mag) for 1082569_g889
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.99, 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: 1082569_657801733_211105d10h56m16s269956usUT_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(271.0731,41.3949,45")
image paragraph message for exposure 2 of trigger 1082569
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 GRB211105 (Swift/BAT trigger 1082569) at 10:27:23 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 862 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 0.031.
------- notes for trigger 1082569 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 211105d10h56m20s189658usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1082569
-expid=657801733 -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/1082569/
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 657801733.66548 or about 2021:309:10:42:08 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. 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 19.99 mag. Found 74 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 10% of the
Genie image region. The Genie image is INCOMPLETE with 965 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?
657801733 861 WHITE srclist data are not available.
657801733 861 WHITE image found no candidates.
List afterglow candidates for other finding charts.
657800943 71 WHITE srclist found no candidates.
657800943 71 WHITE image found no candidates.
------- Tokens for Quick GCN -------