image overlap message for exposure 2 of trigger 1064377
uvot_overlap.pl vrs. 2010-12-20b fem started at 210807d19h03m59s982974usUT
The observation of trigger 1064377 started 2021-08-07T18:56:36.3
Examining file 1064377_g895_uvot_sky_image.fits
The exposure ID is 650055396
The exposure time is 101.634 (seconds)
The filter is WHITE.
The uvot region is centered at (245.0958,-15.9063) with a roll angle of 281.7
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 (245.1320,-15.8980) with a radius of 3.000 arc min
This is 2.150 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 5.82 sq. arc min or 0.21 of the BAT error circle
The XRT error circle is centered at (245.1012,-15.9059) with a radius of 0.078 arc min
This is 0.315 arc min from the center of the uvot region
The area of the XRT error circle is 0.019 sq. arc min
The UVOT/XRT overlap is 0.019 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1064377
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210807d19h04m01s822642usUT
Observation start time is 2021-08-07T18:56:36.3
Examining file 1064377_g895_uvot_sources_image.fits
The exposure ID is 650055396
The exposure is 101.634 sec.
The bin size is 2 pixels
The filter is WHITE
There are 12 detected source(s) for 1064377_g895
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 245.0988 , -15.9044 with radius 2.45 arc min.
n_usno: 134 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Found 12 entries without IDs and 12 entries that are acceptable afterglow candidates for 1064377_g895.
Acceptable entries have no ID, XRT distances < 11.75", 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=245.1320 (16:20:31.68) DEC=-15.8980 (-15:53:52.8)
XRT distances are from RA=245.1012 (16:20:24.29) DEC=-15.9059 (-15:54:21.2)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1064377_g895 with genie
ra=245.08122 (16:20:19.49) dec=-15.92159 (-15:55:17.7) +/- 0.8" mag=19.40+/-0.18
dist=89.3 REFID=1 major=1.3 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 195.2 arc sec from the BAT position.
This source is near the edge of image (0.949)
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
245.0821 -15.9181 12.9 -1 USNO-B1 19.25 18.23 18.68 *
245.0842 -15.9222 10.4 -1 USNO-B1 20.12 19.07 19.54 *
245.0797 -15.9180 14.0 -1 USNO-B1 20.34 18.89 19.54 *
245.0805 -15.9241 9.5 -1 USNO-B1 21.34 19.05 20.07 *
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 1064377_g895 with genie
ra=245.10745 (16:20:25.79) dec=-15.88721 (-15:53:13.9) +/- 0.8" mag=19.64+/-0.19
dist=70.7 REFID=2 major=0.9 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 93.4 arc sec from the BAT position.
This source is near the edge of image (0.958)
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
245.1076 -15.8861 3.9 -1 USNO-B1 20.53 19.26 19.82 *
245.1081 -15.8856 6.1 -1 USNO-B1 19.95 18.30 19.03 *
245.1046 -15.8838 15.8 -1 USNO-B1 17.54 16.40 16.90 *
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 1064377_g895 with genie
ra=245.08677 (16:20:20.82) dec=-15.89132 (-15:53:28.7) +/- 0.8" mag=19.17+/-0.17
dist=72.5 REFID=3 major=2.3 minor=1.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 158.5 arc sec from the BAT position.
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.3
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1064377_g895 with genie
ra=245.09262 (16:20:22.23) dec=-15.89526 (-15:53:42.9) +/- 0.8" mag=17.61+/-0.14
dist=48.5 REFID=4 major=1.2 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 136.7 arc sec from the BAT position.
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1064377_g895 with genie
ra=245.07608 (16:20:18.26) dec=-15.89839 (-15:53:54.2) +/- 0.7" mag=14.79+/-0.14
dist=91.1 REFID=5 major=0.6 minor=0.5 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 193.6 arc sec from the BAT position.
This source is near the edge of image (0.878)
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
245.0753 -15.9009 9.3 -1 USNO-B1 20.46 18.50 19.37 *
245.0741 -15.8974 7.7 -1 USNO-B1 20.92 19.81 20.30 *
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 1064377_g895 with genie
ra=245.07606 (16:20:18.25) dec=-15.89973 (-15:53:59.0) +/- 0.7" mag=16.46+/-0.14
dist=89.8 REFID=6 major=0.5 minor=0.3 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 193.8 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
245.0792 -15.9042 19.3 -1 USNO-B1 19.88 18.84 19.30
245.0753 -15.9009 4.8 -1 USNO-B1 20.46 18.50 19.37 *
245.0741 -15.8974 10.7 -1 USNO-B1 20.92 19.81 20.30 *
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 1064377_g895 with genie
ra=245.12153 (16:20:29.17) dec=-15.91042 (-15:54:37.5) +/- 0.7" mag=17.24+/-0.14
dist=72.2 REFID=7 major=0.8 minor=0.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 57.6 arc sec from the BAT position.
This source is near the edge of image (0.965)
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
245.1199 -15.9053 19.4 -1 USNO-B1 20.57 18.98 19.69 *
245.1215 -15.9134 10.6 -1 USNO-B1 16.13 14.68 15.32 *
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 7 in the list of sources is a candidate afterglow for 1064377_g895 with genie
ra=245.09477 (16:20:22.75) dec=-15.91622 (-15:54:58.4) +/- 0.7" mag=16.34+/-0.14
dist=43.3 REFID=8 major=6.4 minor=2.1 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 144.6 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
245.0972 -15.9183 11.2 -1 USNO-B1 18.46 17.22 17.77 *
245.0891 -15.9159 19.6 -1 USNO-B1 20.66 19.68 20.12
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 1064377_g895 with genie
ra=245.09838 (16:20:23.61) dec=-15.90559 (-15:54:20.1) +/- 0.7" mag=15.88+/-0.14
dist=9.8 REFID=9 major=8.5 minor=2.8 flag=2 (blended)
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
245.1020 -15.9076 14.4 -1 USNO-B1 19.09 17.81 18.38
245.1036 -15.9039 19.0 -1 USNO-B1 18.62 17.22 17.84
*** unacceptable major profile of 8.5
-----------------
Entry 9 in the list of sources is a candidate afterglow for 1064377_g895 with genie
ra=245.09787 (16:20:23.49) dec=-15.91564 (-15:54:56.3) +/- 0.7" mag=16.46+/-0.14
dist=36.9 REFID=10 major=5.9 minor=2.4 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 134.2 arc sec from the BAT position.
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
245.0972 -15.9183 10.0 -1 USNO-B1 18.46 17.22 17.77 *
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 1064377_g895 with genie
ra=245.09758 (16:20:23.42) dec=-15.91542 (-15:54:55.5) +/- 0.7" mag=13.71+/-0.14
dist=36.5 REFID=11 major=1.0 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 134.7 arc sec from the BAT position.
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
245.0972 -15.9183 10.6 -1 USNO-B1 18.46 17.22 17.77 *
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 1064377_g895 with genie
ra=245.09603 (16:20:23.05) dec=-15.92033 (-15:55:13.2) +/- 0.7" mag=17.08+/-0.14
dist=54.9 REFID=12 major=4.8 minor=1.5 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 148.2 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
245.0972 -15.9183 8.2 -1 USNO-B1 18.46 17.22 17.77 *
245.0940 -15.9236 13.6 -1 USNO-B1 17.97 16.79 17.31
245.0976 -15.9249 17.3 -1 USNO-B1 20.66 19.58 20.06
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 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
245.1020 -15.9076 6.6 -1 USNO-B1 19.09 17.81 18.38
245.1036 -15.9039 10.9 -1 USNO-B1 18.62 17.22 17.84
The closest star is 6.62" away.
List UVOT sources within 20" of the XRT position:
Unmatched source ra=245.09838 (16:20:23.61) dec=-15.90559 (-15:54:20.1) +/- 0.7" mag=15.88+/-0.14 dist=9.8 REFID=9 flag=2
There are 60251.715 counts in the bkg source region of 5874.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.257 counts/pixel (5-sig UL in 4" is 19.66 mag) for 1064377_g895
There are 1819.7021 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 9.190 counts/pixel for 1064377_g895
There are 13440.593 counts in the xrt_bkg source region of 1245.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 10.796 counts/pixel (5-sig UL in 4" is 19.64 mag) for 1064377_g895
There are 1 candidate(s) outside XRT error circle with mag < 19.66
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.22, XRT distances < 11.75",
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: 1064377_650055396_210807d19h04m01s822642usUT_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(245.0958,-15.9063,45")
fk5;-circle(245.092621642177,-15.8952584800316,6")
fk5;-circle(245.094773916066,-15.9162219416761,6")
fk5;-circle(245.098380299831,-15.9055931510391,6")
fk5;-circle(245.097865700809,-15.9156414065311,6")
fk5;-circle(245.097580259724,-15.9154224908039,6")
fk5;-circle(245.09603420106,-15.9203272400973,6")
Region file: 1064377_650055396_210807d19h04m01s822642usUT_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(245.1012,-15.9059,8")
Region file: 1064377_650055396_210807d19h04m01s822642usUT_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(245.1012,-15.9059,25")
fk5;-circle(245.1012,-15.9059,15")
fk5;-circle(245.098380299831,-15.9055931510391,6")
image paragraph message for exposure 2 of trigger 1064377
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.
1 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 GRB210807 (Swift/BAT trigger 1064377) at 18:41:40 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 102 seconds with the White filter
starting 868 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 0.335.
------- notes for trigger 1064377 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210807d19h04m04s315298usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1064377
-expid=650055396 -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/1064377/
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 650055396.34752 or about 2021:219:18:56:31 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. 1 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
20.22 mag. Found 130 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 15% of the Genie image region.
Found 1 Genie source(s) within 20.0" of the XRT position. The brightest such
source has ra= 245.0984 dec= -15.9056 mag=15.88 sep=9.82". The closest Genie
source has ra= 245.0984 dec= -15.9056 mag=15.88 sep=9.82".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 19.66 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=245.09262
(16:20:22.23), DEC=-15.89526 (-15:53:42.9) (J2000). It has a mag of 17.61. It
is 136.7" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 102 seconds with the White filter
starting 868 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 16:20:22.23 = 245.09262
DEC(J2000) = -15:53:42.9 = -15.89526
with a 90%-confidence error radius of about 0.75 arc sec. The estimated
magnitude is 17.61 with a 1-sigma error of about 0.14. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.335.
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 102 seconds with the White filter
starting 868 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 16:20:23.61 = 245.09838
DEC(J2000) = -15:54:20.1 = -15.90559
with a 90%-confidence error radius of about 0.75 arc sec. This position is 9.82
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.88 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.335.
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?
650055396 868 WHITE srclist data are not available.
650055396 868 WHITE image found no candidates.
List afterglow candidates for other finding charts.
650054746 218 ? srclist data are not available.
650054746 218 WHITE image found no candidates.
------- Tokens for Quick GCN -------