image overlap message for exposure 2 of trigger 1036227
uvot_overlap.pl vrs. 2010-12-20b fem started at 210308d12h50m13s922928usUT
The observation of trigger 1036227 started 2021-03-08T06:43:30.5
Examining file ./1036227_g333_uvot_sky_image.fits
The exposure ID is 636878610
The exposure time is 249.946 (seconds)
The filter is U.
The uvot region is centered at (67.0725,37.4321) with a roll angle of 259.0
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 (67.0880,37.4110) with a radius of 3.000 arc min
This is 1.464 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 7.04 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (67.0746,37.4341) with a radius of 0.037 arc min
This is 0.154 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1036227
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210308d12h50m34s569713usUT
Observation start time is 2021-03-08T06:43:30.5
Examining file ./1036227_g333_uvot_sources_image.fits
The exposure ID is 636878610
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 2 detected source(s) for 1036227_g333
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 67.0907 , 37.4239 with radius 2.00 arc min.
n_usno: 63 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1036227_g333.
Acceptable entries have no ID, XRT distances < 5.5", 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=67.0880 (04:28:21.12) DEC=37.4110 (+37:24:39.6)
XRT distances are from RA=67.0746 (04:28:17.90) DEC=37.4341 (+37:26:02.7)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1036227_g333 with genie
ra=67.08879 (04:28:21.31) dec=37.41006 (+37:24:36.2) +/- 0.8" mag=18.93+/-0.18
dist=95.6 REFID=1 major=1.1 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 4.1 arc sec from the BAT position.
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
67.0855 37.4125 12.9 -1 USNO-B1 99.99 19.49 99.99 *
67.0880 37.4090 4.5 -1 USNO-B1 16.85 14.09 15.31 *
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 1036227_g333 with genie
ra=67.09255 (04:28:22.21) dec=37.43775 (+37:26:15.9) +/- 0.8" mag=17.84+/-0.15
dist=53.0 REFID=2 major=1.0 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 97.2 arc sec from the BAT position.
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
67.0916 37.4327 18.2 -1 USNO-B1 99.99 19.61 99.99
67.0919 37.4367 4.4 -1 USNO-B1 16.17 13.88 14.89 *
67.0870 37.4390 16.4 -1 USNO-B1 99.99 19.73 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
Found 5 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
67.0794 37.4311 17.5 -1 USNO-B1 19.97 18.18 18.98
67.0731 37.4312 11.2 -1 USNO-B1 99.99 19.77 99.99
67.0682 37.4331 18.5 -1 USNO-B1 99.99 19.66 99.99
67.0680 37.4354 19.4 -1 USNO-B1 99.99 20.14 99.99
67.0680 37.4357 19.6 -1 USNO-B1 99.99 19.66 99.99
The closest star is 11.16" away.
List UVOT sources within 20" of the XRT position:
There are 24947.324 counts in the bkg source region of 6304.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 3.957 counts/pixel (5-sig UL in 4" is 19.72 mag) for 1036227_g333
There are 760.67633 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 3.803 counts/pixel for 1036227_g333
There are 4898.8042 counts in the xrt_bkg source region of 1247.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 3.928 counts/pixel (5-sig UL in 4" is 19.72 mag) for 1036227_g333
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 20.27, XRT distances < 5.5",
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: 1036227_636878610_210308d12h50m34s569713usUT_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(67.0725,37.4321,45")
Region file: 1036227_636878610_210308d12h50m34s569713usUT_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(67.07458,37.43408,8")
Region file: 1036227_636878610_210308d12h50m34s569713usUT_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(67.07458,37.43408,25")
fk5;-circle(67.07458,37.43408,15")
image paragraph message for exposure 2 of trigger 1036227
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 GRB210308 (Swift/BAT trigger 1036227) at 06:37:56 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
306 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 1.296.
------- notes for trigger 1036227 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210308d12h50m51s402743usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1036227
-expid=636878610 -meonly -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/1036227/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 636878610.47598 or about 2021:067:06:43:25 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 2 source(s) in Genie image catalog. Found 2 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.27 mag. Found 59 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 10% of the
Genie image region. The closest Genie source has ra= 67.0926 dec= 37.4378
mag=17.84 sep=53.05".
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?
636878610 306 U srclist data are not available.
636878610 306 U image found no candidates.
List afterglow candidates for other finding charts.
636878398 94 WHITE 67.07372 37.43386 18.95/19.2 2.6 srclist Yes
636878398 94 WHITE 67.07388 37.43388 18.57/20.4 8.5 image Yes
636879163 859 WHITE srclist found no candidates.
636879163 859 WHITE image found no candidates.
------- Tokens for Quick GCN -------