image overlap message for exposure 2 of trigger 1036990
uvot_overlap.pl vrs. 2010-12-20b fem started at 210315d05h42m55s356855usUT
The observation of trigger 1036990 started 2021-03-15T05:36:50.6
Examining file 1036990_g900_uvot_sky_image.fits
The exposure ID is 637479410
The exposure time is 149.846 (seconds)
The filter is U.
The uvot region is centered at (299.7031,35.3890) with a roll angle of 113.4
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 (299.7400,35.4030) with a radius of 3.000 arc min
This is 1.989 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 6.06 sq. arc min or 0.21 of the BAT error circle
The XRT error circle is centered at (299.6988,35.3895) with a radius of 0.083 arc min
This is 0.215 arc min from the center of the uvot region
The area of the XRT error circle is 0.022 sq. arc min
The UVOT/XRT overlap is 0.022 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1036990
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210315d05h42m56s970272usUT
Observation start time is 2021-03-15T05:36:50.6
Examining file 1036990_g900_uvot_sources_image.fits
The exposure ID is 637479410
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is U
There are 7 detected source(s) for 1036990_g900
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 299.7014 , 35.3944 with radius 2.57 arc min.
n_usno: 364 n_gsc: 0
*** 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
Found 7 entries without IDs and 7 entries that are acceptable afterglow candidates for 1036990_g900.
Acceptable entries have no ID, XRT distances < 12.5", 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=299.7400 (19:58:57.60) DEC=35.4030 (+35:24:10.8)
XRT distances are from RA=299.6988 (19:58:47.71) DEC=35.3895 (+35:23:22.2)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1036990_g900 with genie
ra=299.72780 (19:58:54.67) dec=35.37972 (+35:22:47.0) +/- 0.9" mag=18.66+/-0.22
dist=92.1 REFID=1 major=1.6 minor=1.1 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 91.1 arc sec from the BAT position.
This source is near the edge of image (0.887)
Found 5 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
299.7251 35.3837 16.4 -1 USNO-B1 17.05 15.01 15.92 *
299.7273 35.3849 18.8 -1 USNO-B1 19.14 16.95 17.93 *
299.7278 35.3787 3.6 -1 USNO-B1 99.99 17.93 99.99 *
299.7322 35.3808 13.3 -1 USNO-B1 18.75 17.38 17.99 *
299.7318 35.3787 12.4 -1 USNO-B1 19.32 17.56 18.34 *
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 1 in the list of sources is a candidate afterglow for 1036990_g900 with genie
ra=299.70818 (19:58:49.96) dec=35.40917 (+35:24:33.0) +/- 0.8" mag=16.55+/-0.15
dist=76.0 REFID=2 major=1.9 minor=1.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 96.0 arc sec from the BAT position.
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
299.7053 35.4051 16.9 -1 USNO-B1 19.73 17.00 18.21
299.7057 35.4098 7.6 -1 USNO-B1 18.71 15.39 16.87 *
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 2 in the list of sources is a candidate afterglow for 1036990_g900 with genie
ra=299.70801 (19:58:49.92) dec=35.40391 (+35:24:14.1) +/- 0.7" mag=15.67+/-0.14
dist=58.5 REFID=3 major=1.6 minor=1.3 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 93.9 arc sec from the BAT position.
Found 4 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
299.7048 35.4016 12.5 -1 USNO-B1 19.56 16.59 17.91 *
299.7017 35.4035 18.5 -1 USNO-B1 99.99 16.63 99.99
299.7053 35.4051 8.9 -1 USNO-B1 19.73 17.00 18.21 *
299.7141 35.4060 19.3 -1 USNO-B1 18.20 16.25 17.11
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 3 in the list of sources is a candidate afterglow for 1036990_g900 with genie
ra=299.70574 (19:58:49.38) dec=35.40071 (+35:24:02.5) +/- 0.7" mag=14.16+/-0.14
dist=45.2 REFID=4 major=1.7 minor=1.2 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 100.9 arc sec from the BAT position.
Found 5 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
299.7041 35.3966 15.6 -1 USNO-B1 19.42 17.63 18.42
299.7048 35.4016 4.2 -1 USNO-B1 19.56 16.59 17.91 *
299.7017 35.4035 15.5 -1 USNO-B1 99.99 16.63 99.99
299.7009 35.4040 18.5 -1 USNO-B1 18.81 16.33 17.43
299.7053 35.4051 15.8 -1 USNO-B1 19.73 17.00 18.21
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 4 in the list of sources is a candidate afterglow for 1036990_g900 with genie
ra=299.71972 (19:58:52.73) dec=35.40376 (+35:24:13.5) +/- 0.7" mag=15.46+/-0.14
dist=80.0 REFID=5 major=1.7 minor=1.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 59.6 arc sec from the BAT position.
This source is near the edge of image (0.854)
Found 8 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
299.7164 35.4016 12.4 -1 USNO-B1 18.90 16.45 17.54 *
299.7175 35.4010 12.0 -1 USNO-B1 99.99 17.57 99.99 *
299.7141 35.4060 18.4 -1 USNO-B1 18.20 16.25 17.11 *
299.7181 35.4037 4.9 -1 USNO-B1 99.99 17.77 99.99 *
299.7239 35.4000 18.2 -1 USNO-B1 99.99 18.09 99.99 *
299.7246 35.4025 15.0 -1 USNO-B1 19.83 17.87 18.74 *
299.7214 35.4070 12.8 -1 USNO-B1 19.40 17.45 18.32 *
299.7245 35.4050 14.9 -1 USNO-B1 17.57 16.07 16.74 *
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 5 in the list of sources is a candidate afterglow for 1036990_g900 with genie
ra=299.67491 (19:58:41.98) dec=35.39311 (+35:23:35.2) +/- 0.8" mag=16.20+/-0.14
dist=71.3 REFID=6 major=1.5 minor=1.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 194.3 arc sec from the BAT position.
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
299.6790 35.3949 13.6 -1 USNO-B1 18.02 15.93 16.86
299.6738 35.3885 16.9 -1 USNO-B1 17.88 16.27 16.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1036990_g900 with genie
ra=299.72690 (19:58:54.45) dec=35.38619 (+35:23:10.3) +/- 0.8" mag=16.95+/-0.15
dist=83.3 REFID=7 major=1.6 minor=1.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 71.7 arc sec from the BAT position.
Found 4 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
299.7232 35.3879 12.5 -1 USNO-B1 19.16 17.72 18.36 *
299.7251 35.3837 10.4 -1 USNO-B1 17.05 15.01 15.92 *
299.7273 35.3849 4.7 -1 USNO-B1 19.14 16.95 17.93 *
299.7320 35.3864 15.1 -1 USNO-B1 17.90 15.78 16.72
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 4 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
299.7014 35.3933 15.7 -1 USNO-B1 16.13 13.71 14.78
299.6984 35.3908 4.8 -1 USNO-B1 13.97 12.59 13.21
299.7052 35.3889 18.9 -1 USNO-B1 19.08 17.27 18.08
299.7000 35.3865 11.3 -1 USNO-B1 18.52 16.80 17.57
The closest star is 4.81" away.
List UVOT sources within 20" of the XRT position:
There are 40746.414 counts in the bkg source region of 6227.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.544 counts/pixel (5-sig UL in 4" is 18.89 mag) for 1036990_g900
There are 1303.7091 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 6.519 counts/pixel for 1036990_g900
There are 8057.8062 counts in the xrt_bkg source region of 1249.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 6.451 counts/pixel (5-sig UL in 4" is 18.90 mag) for 1036990_g900
There are 1 candidate(s) outside XRT error circle with mag < 18.88
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.44, XRT distances < 12.5",
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: 1036990_637479410_210315d05h42m56s970272usUT_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(299.7031,35.3890,45")
fk5;-circle(299.705743403833,35.4007074960397,6")
Region file: 1036990_637479410_210315d05h42m56s970272usUT_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(299.6988,+35.3895,8")
Region file: 1036990_637479410_210315d05h42m56s970272usUT_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(299.6988,+35.3895,25")
fk5;-circle(299.6988,+35.3895,15")
image paragraph message for exposure 2 of trigger 1036990
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.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB210315 (Swift/BAT trigger 1036990) at 05:21:49 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the U filter starting
874 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
large, but uncertain, extinction expected.
------- notes for trigger 1036990 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210315d05h42m59s965234usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1036990
-expid=637479410 -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/1036990/
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. XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 637479410.64046 or about 2021:074:05:36:45 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 7 source(s) in Genie image catalog. Found 7 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.44 mag. Found 360 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 37% of the
Genie image region. The closest Genie source has ra= 299.7057 dec= 35.4007
mag=14.16 sep=45.20".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 18.88 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=299.67491
(19:58:41.98), DEC=35.39311 (+35:23:35.2) (J2000). It has a mag of 16.20. It is
194.3" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the U filter starting
874 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 19:58:41.98 = 299.67491
DEC(J2000) = +35:23:35.2 = 35.39311
with a 90%-confidence error radius of about 0.75 arc sec. The estimated
magnitude is 16.20 with a 1-sigma error of about 0.14. No correction has been
made for the large, but uncertain, extinction expected.
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?
637479410 874 U srclist data are not available.
637479410 874 U image found no candidates.
List afterglow candidates for other finding charts.
637478671 135 ? srclist data are not available.
637478671 135 U image found no candidates.
------- Tokens for Quick GCN -------