image overlap message for exposure 1 of trigger 1071762
uvot_overlap.pl vrs. 2010-12-20b fem started at 210903d13h58m07s926973usUT
The observation of trigger 1071762 started 2021-09-03T13:49:01.2
Examining file 1071762_g176_uvot_sky_image.fits
The exposure ID is 652369741
The exposure time is 149.846 (seconds)
The filter is WHITE.
The uvot region is centered at (135.4419,-40.3177) with a roll angle of 34.3
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 (135.4140,-40.3090) with a radius of 3.000 arc min
This is 1.380 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 7.10 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (135.4377,-40.3207) with a radius of 0.098 arc min
This is 0.265 arc min from the center of the uvot region
The area of the XRT error circle is 0.030 sq. arc min
The UVOT/XRT overlap is 0.030 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1071762
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210903d13h58m10s628953usUT
Observation start time is 2021-09-03T13:49:01.2
Examining file 1071762_g176_uvot_sources_image.fits
The exposure ID is 652369741
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 12 detected source(s) for 1071762_g176
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 135.4360 , -40.3113 with radius 2.00 arc min.
n_usno: 158 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.04356
RA DEC Mag Color
bright star 0: 135.47283 (09:01:53.48) -40.32187 (-40:19:18.7) 11.04 USNO-V
Found 12 entries without IDs and 12 entries that are acceptable afterglow candidates for 1071762_g176.
Acceptable entries have no ID, XRT distances < 14.75", 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=135.4140 (09:01:39.36) DEC=-40.3090 (-40:18:32.4)
XRT distances are from RA=135.4377 (09:01:45.05) DEC=-40.3207 (-40:19:14.5)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1071762_g176 with genie
ra=135.44902 (09:01:47.76) dec=-40.31420 (-40:18:51.1) +/- 0.7" mag=17.22+/-0.14
dist=38.9 REFID=1 major=1.6 minor=1.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 97.9 arc sec from the BAT position.
Found 4 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
135.4504 -40.3109 12.5 -1 USNO-B1 17.94 15.72 16.71 *
135.4505 -40.3116 10.1 -1 USNO-B1 19.70 17.55 18.50 *
135.4478 -40.3185 15.9 -1 USNO-B1 20.34 18.54 19.34
135.4533 -40.3132 12.4 -1 USNO-B1 18.05 16.48 17.17 *
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 1071762_g176 with genie
ra=135.41980 (09:01:40.75) dec=-40.30145 (-40:18:05.2) +/- 0.7" mag=16.03+/-0.14
dist=84.9 REFID=2 major=1.1 minor=0.5 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 31.5 arc sec from the BAT position.
This source is near the edge of image (1.006)
Found 6 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
135.4186 -40.3046 11.8 -1 USNO-B1 19.64 18.42 18.96 *
135.4175 -40.3048 13.6 -1 USNO-B1 99.99 18.71 99.99 *
135.4234 -40.2975 17.4 -1 USNO-B1 20.98 19.72 20.28 *
135.4152 -40.3046 17.0 -1 USNO-B1 19.55 17.93 18.65 *
135.4192 -40.2998 6.3 -1 USNO-B1 19.29 17.73 18.42 *
135.4181 -40.2973 15.8 -1 USNO-B1 19.25 17.88 18.49 *
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 1071762_g176 with genie
ra=135.45225 (09:01:48.54) dec=-40.30158 (-40:18:05.7) +/- 0.8" mag=18.74+/-0.16
dist=79.6 REFID=3 major=1.4 minor=1.1 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 108.4 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
135.4473 -40.3002 14.5 -1 USNO-B1 21.35 19.07 20.08
135.4573 -40.3004 14.6 -1 USNO-B1 18.54 16.31 17.30
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1071762_g176 with genie
ra=135.45093 (09:01:48.22) dec=-40.30817 (-40:18:29.4) +/- 0.7" mag=17.21+/-0.14
dist=57.9 REFID=4 major=1.3 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 101.4 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
135.4504 -40.3109 9.9 -1 USNO-B1 17.94 15.72 16.71 *
135.4495 -40.3073 5.0 -1 USNO-B1 19.34 18.02 18.60 *
135.4505 -40.3116 12.6 -1 USNO-B1 19.70 17.55 18.50 *
135.4533 -40.3132 19.2 -1 USNO-B1 18.05 16.48 17.17
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 1071762_g176 with genie
ra=135.42075 (09:01:40.98) dec=-40.31313 (-40:18:47.3) +/- 0.7" mag=17.28+/-0.14
dist=53.9 REFID=5 major=2.1 minor=1.0 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 23.8 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
135.4232 -40.3142 7.7 -1 USNO-B1 19.11 17.84 18.40 *
135.4186 -40.3100 12.8 -1 USNO-B1 19.23 18.08 18.59 *
135.4179 -40.3133 7.9 -1 USNO-B1 18.53 16.78 17.56 *
135.4161 -40.3167 18.0 -1 USNO-B1 99.99 17.56 99.99
135.4158 -40.3165 18.1 -1 USNO-B1 17.56 16.50 16.97
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 5 in the list of sources is a candidate afterglow for 1071762_g176 with genie
ra=135.42255 (09:01:41.41) dec=-40.31428 (-40:18:51.4) +/- 0.7" mag=16.93+/-0.14
dist=47.6 REFID=6 major=1.9 minor=0.8 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 30.2 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
135.4232 -40.3142 1.9 -1 USNO-B1 19.11 17.84 18.40 *
135.4186 -40.3100 19.0 -1 USNO-B1 19.23 18.08 18.59
135.4179 -40.3133 13.3 -1 USNO-B1 18.53 16.78 17.56 *
135.4161 -40.3167 19.6 -1 USNO-B1 99.99 17.56 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
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1071762_g176 with genie
ra=135.42534 (09:01:42.08) dec=-40.31738 (-40:19:02.6) +/- 0.7" mag=15.23+/-0.14
dist=36.0 REFID=7 major=1.5 minor=1.0 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 43.3 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
135.4281 -40.3190 9.7 -1 USNO-B1 20.39 18.93 19.58 *
135.4232 -40.3142 13.0 -1 USNO-B1 19.11 17.84 18.40 *
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 7 in the list of sources is a candidate afterglow for 1071762_g176 with genie
ra=135.43856 (09:01:45.25) dec=-40.31403 (-40:18:50.5) +/- 0.7" mag=15.84+/-0.14
dist=24.1 REFID=8 major=3.3 minor=1.5 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 69.8 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
135.4360 -40.3127 8.4 -1 USNO-B1 21.90 19.53 20.58 *
135.4409 -40.3122 9.3 -1 USNO-B1 21.01 19.42 20.13 *
135.4418 -40.3160 11.3 -1 USNO-B1 99.99 18.23 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
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1071762_g176 with genie
ra=135.44154 (09:01:45.97) dec=-40.31590 (-40:18:57.2) +/- 0.7" mag=15.76+/-0.14
dist=20.3 REFID=9 major=2.3 minor=1.2 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 79.6 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
135.4360 -40.3127 19.0 -1 USNO-B1 21.90 19.53 20.58
135.4409 -40.3122 13.5 -1 USNO-B1 21.01 19.42 20.13
135.4418 -40.3160 0.8 -1 USNO-B1 99.99 18.23 99.99 *
135.4478 -40.3185 19.6 -1 USNO-B1 20.34 18.54 19.34
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 9 in the list of sources is a candidate afterglow for 1071762_g176 with genie
ra=135.44018 (09:01:45.64) dec=-40.31621 (-40:18:58.4) +/- 0.7" mag=16.28+/-0.14
dist=17.5 REFID=10 major=1.5 minor=0.8 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 76.4 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
135.4360 -40.3127 17.0 -1 USNO-B1 21.90 19.53 20.58
135.4409 -40.3122 14.7 -1 USNO-B1 21.01 19.42 20.13
135.4418 -40.3160 4.6 -1 USNO-B1 99.99 18.23 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
-----------------
Entry 10 in the list of sources is a candidate afterglow for 1071762_g176 with genie
ra=135.44290 (09:01:46.30) dec=-40.31907 (-40:19:08.7) +/- 0.7" mag=14.40+/-0.14
dist=15.4 REFID=11 major=2.5 minor=1.8 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 87.2 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
135.4418 -40.3160 11.6 -1 USNO-B1 99.99 18.23 99.99 *
135.4478 -40.3185 13.6 -1 USNO-B1 20.34 18.54 19.34
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 11 in the list of sources is a candidate afterglow for 1071762_g176 with genie
ra=135.44337 (09:01:46.41) dec=-40.32117 (-40:19:16.2) +/- 0.7" mag=16.55+/-0.14
dist=15.7 REFID=12 major=1.3 minor=1.1 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 91.7 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
135.4418 -40.3160 19.2 -1 USNO-B1 99.99 18.23 99.99
135.4478 -40.3185 15.5 -1 USNO-B1 20.34 18.54 19.34
135.4381 -40.3238 17.4 -1 USNO-B1 18.83 17.50 18.09
*** If XRT position is correct, then this is NOT the afterglow
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
135.4332 -40.3182 15.3 -1 USNO-B1 17.92 16.32 17.03
135.4326 -40.3183 16.4 -1 USNO-B1 99.99 18.91 99.99
135.4323 -40.3232 17.4 -1 USNO-B1 21.60 19.71 20.55
135.4381 -40.3238 11.2 -1 USNO-B1 18.83 17.50 18.09
The closest star is 11.22" away.
List UVOT sources within 20" of the XRT position:
Unmatched source ra=135.44018 (09:01:45.64) dec=-40.31621 (-40:18:58.4) +/- 0.7" mag=16.28+/-0.14 dist=17.5 REFID=10 flag=3
Unmatched source ra=135.44290 (09:01:46.30) dec=-40.31907 (-40:19:08.7) +/- 0.7" mag=14.40+/-0.14 dist=15.4 REFID=11 flag=3
Unmatched source ra=135.44337 (09:01:46.41) dec=-40.32117 (-40:19:16.2) +/- 0.7" mag=16.55+/-0.14 dist=15.7 REFID=12 flag=3
There are 1.5580202E+05 counts in the bkg source region of 5602.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 27.812 counts/pixel (5-sig UL in 4" is 19.54 mag) for 1071762_g176
There are 1716.8577 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 8.627 counts/pixel for 1071762_g176
There are 18083.861 counts in the xrt_bkg source region of 947.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 19.096 counts/pixel (5-sig UL in 4" is 19.75 mag) for 1071762_g176
There are 2 candidate(s) outside XRT error circle with mag < 19.54
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.10, XRT distances < 14.75",
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: 1071762_652369741_210903d13h58m10s628953usUT_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(135.4419,-40.3177,45")
fk5;-circle(135.449017623782,-40.3142049768631,6")
fk5;-circle(135.450932327084,-40.3081661039486,6")
fk5;-circle(135.425343769421,-40.3173752834889,6")
fk5;-circle(135.438556145767,-40.3140259814169,6")
fk5;-circle(135.441544081707,-40.3158970077954,6")
fk5;-circle(135.440175859409,-40.316214205706,6")
fk5;-circle(135.442904286659,-40.3190728003824,6")
fk5;-circle(135.443371185854,-40.32116506146,6")
Region file: 1071762_652369741_210903d13h58m10s628953usUT_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(135.4377,-40.3207,8")
Region file: 1071762_652369741_210903d13h58m10s628953usUT_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(135.4377,-40.3207,25")
fk5;-circle(135.4377,-40.3207,15")
fk5;-circle(135.438556145767,-40.3140259814169,6")
fk5;-circle(135.441544081707,-40.3158970077954,6")
fk5;-circle(135.440175859409,-40.316214205706,6")
fk5;-circle(135.442904286659,-40.3190728003824,6")
fk5;-circle(135.443371185854,-40.32116506146,6")
image paragraph message for exposure 1 of trigger 1071762
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.
3 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB210903 (Swift/BAT trigger 1071762) at 13:46:04 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 149 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 1071762 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210903d13h58m21s796135usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1071762
-expid=652369741 -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/1071762/
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 652369741.18244 or about 2021:246:13:48:56 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 12 source(s) in Genie image catalog. 3 source(s) are within 20.0" of the
xrt position. Found 12 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.10 mag. Found 154 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 26% of the Genie image region.
Found 3 Genie source(s) within 20.0" of the XRT position. The brightest such
source has ra= 135.4429 dec= -40.3191 mag=14.40 sep=15.44". The closest Genie
source has ra= 135.4429 dec= -40.3191 mag=14.40 sep=15.44".
This paragraph is only useful if the XRT position is grossly wrong. There are 2
candidate(s) in the image data with mag < 19.54 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=135.44337
(09:01:46.41), DEC=-40.32117 (-40:19:16.2) (J2000). It has a mag of 16.55. It
is 91.7" 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 White filter
starting 149 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 09:01:46.41 = 135.44337
DEC(J2000) = -40:19:16.2 = -40.32117
with a 90%-confidence error radius of about 0.75 arc sec. The estimated
magnitude is 16.55 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?
652369741 149 WHITE srclist data are not available.
652369741 149 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------