srclist overlap message for exposure 2 of trigger 1121751
uvot_overlap.pl vrs. 2010-12-20b fem started at 220826d14h57m03s014247usUT
The observation of trigger 1121751 started 2022-08-26T12:00:54.4
Examining file ./1121751_g332_uvot_sky_srclist.fits
The exposure ID is 683208054
The exposure time is undefined.
The filter is U.
The uvot region is centered at (206.4042,-44.0390) with a roll angle of 305.9
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (206.4310,-44.0440) with a radius of 3.000 arc min
This is 1.196 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (206.4108,-44.0392) with a radius of 0.037 arc min
This is 0.286 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
srclist afterglow message for exposure 2 of trigger 1121751
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220826d14h57m17s884373usUT
Observation start time is 2022-08-26T12:00:54.4
Examining file ./1121751_g332_uvot_catalog_srclist.fits
The exposure ID is 683208054
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 78 detected source(s) for 1121751_g332
Aspect correction adds -0.00264 degrees (-0.634 sec of time = -6.84 arc sec) to RA
Aspect correction adds 0.00036 degrees ( 1.30 arcsec) to Dec
Total aspect correction is 6.96 arcsec
Star catalogs centered at 206.4071 , -44.0362 with radius 6.30 arc min.
n_usno: 1272 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.99094
RA DEC Mag Color
bright star 0: 206.30759 (13:45:13.82) -43.98873 (-43:59:19.4) 10.99 USNO-V
Mean distance difference (CAT_DELTA) for 77 matched entries is 0.843" for 1121751_g332
Mean and std. dev of mag. difference (MAG_DELTA) are 1.678 and 0.848 for 1121751_g332
Found 8 entries without IDs and 6 entries that are acceptable afterglow candidates for 1121751_g332.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=206.4310 (13:45:43.44) DEC=-44.0440 (-44:02:38.4)
XRT distances are from RA=206.4108 (13:45:38.59) DEC=-44.0392 (-44:02:21.0)
-----------------
Entry 9 in the list of sources is a candidate afterglow for 1121751_g332 with 3x3 stamp
ra=206.42117 (13:45:41.08) dec=-44.06704 (-44:04:01.3) +/- 1.1" mag=17.51+/-0.35
dist=103.9 REFID=37
*** The position of this source is inconsistent with the XRT position.
The position is 83.3 arc sec from the BAT position.
src: 9 srclist_match has ID
src: 9 distr. of nearby unmatched sources: 1 0 0 1 0
Found 7 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 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
206.4250 -44.0624 19.4 -1 USNO-B1 19.63 18.84 19.19
206.4192 -44.0643 11.3 -1 USNO-B1 19.93 19.01 19.42
206.4208 -44.0668 1.3 -1 USNO-B1 15.06 14.65 14.83 *
206.4220 -44.0671 2.1 -1 USNO-B1 15.63 14.78 15.16 *
206.4177 -44.0686 10.5 -1 USNO-B1 18.15 16.62 17.30
206.4244 -44.0677 8.5 -1 USNO-B1 99.99 14.62 99.99
206.4250 -44.0677 10.2 -1 USNO-B1 15.28 14.48 14.84
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 20 in the list of sources is a candidate afterglow for 1121751_g332 with 3x3 stamp
ra=206.41779 (13:45:40.27) dec=-44.00636 (-44:00:22.9) +/- 1.1" mag=18.92+/-0.35
dist=119.5 REFID=73
*** The position of this source is inconsistent with the XRT position.
The position is 143.3 arc sec from the BAT position.
src: 20 distr. of nearby unmatched sources: 0 2 0 0 0
Found 7 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
206.4180 -44.0094 10.8 -1 USNO-B1 19.95 18.98 19.41
206.4200 -44.0092 11.7 -1 USNO-B1 19.52 18.30 18.84
206.4232 -44.0093 17.4 -1 USNO-B1 13.01 12.92 12.96 *
206.4136 -44.0046 12.6 -1 USNO-B1 21.81 17.85 19.61
206.4168 -44.0045 7.1 -1 USNO-B1 13.43 13.15 13.27
206.4229 -44.0043 15.2 -1 USNO-B1 20.46 18.53 19.39
206.4239 -44.0041 17.8 -1 USNO-B1 18.46 18.20 18.31
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 23 in the list of sources is a candidate afterglow for 1121751_g332 with 3x3 stamp
ra=206.41880 (13:45:40.51) dec=-44.00438 (-44:00:15.8) +/- 1.1" mag=18.79+/-0.35
dist=126.9 REFID=72
*** The position of this source is inconsistent with the XRT position.
The position is 149.6 arc sec from the BAT position.
src: 23 distr. of nearby unmatched sources: 1 1 0 0 0
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
206.4180 -44.0094 18.0 -1 USNO-B1 19.95 18.98 19.41
206.4200 -44.0092 17.6 -1 USNO-B1 19.52 18.30 18.84
206.4136 -44.0046 13.4 -1 USNO-B1 21.81 17.85 19.61
206.4168 -44.0045 5.3 -1 USNO-B1 13.43 13.15 13.27
206.4229 -44.0043 10.7 -1 USNO-B1 20.46 18.53 19.39
206.4239 -44.0041 13.3 -1 USNO-B1 18.46 18.20 18.31
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 24 in the list of sources is a candidate afterglow for 1121751_g332 with 3x3 stamp
ra=206.41818 (13:45:40.36) dec=-44.00370 (-44:00:13.3) +/- 1.1" mag=18.71+/-0.35
dist=129.1 REFID=69
*** The position of this source is inconsistent with the XRT position.
The position is 152.3 arc sec from the BAT position.
src: 24 distr. of nearby unmatched sources: 1 1 0 0 0
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
206.4136 -44.0046 12.2 -1 USNO-B1 21.81 17.85 19.61
206.4168 -44.0045 4.7 -1 USNO-B1 13.43 13.15 13.27
206.4229 -44.0043 12.5 -1 USNO-B1 20.46 18.53 19.39
206.4239 -44.0041 14.9 -1 USNO-B1 18.46 18.20 18.31
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 42 in the list of sources is a candidate afterglow for 1121751_g332 with 3x3 stamp
ra=206.37013 (13:45:28.83) dec=-44.07910 (-44:04:44.8) +/- 1.1" mag=17.88+/-0.35
dist=178.1 REFID=49
*** The position of this source is inconsistent with the XRT position.
The position is 199.7 arc sec from the BAT position.
src: 42 srclist_match has ID
src: 42 distr. of nearby unmatched sources: 0 1 0 0 0
Found 9 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
206.3749 -44.0805 13.3 -1 USNO-B1 20.74 18.91 19.73
206.3698 -44.0793 1.2 -1 USNO-B1 17.09 15.72 16.33 *
206.3742 -44.0815 13.5 -1 USNO-B1 21.03 18.47 19.61
206.3724 -44.0813 9.8 -1 USNO-B1 21.38 18.68 19.88
206.3715 -44.0812 8.2 -1 USNO-B1 20.28 17.54 18.76
206.3684 -44.0802 6.1 -1 USNO-B1 20.95 14.92 17.60
206.3737 -44.0829 16.7 -1 USNO-B1 18.85 18.08 18.42
206.3675 -44.0811 9.7 -1 USNO-B1 13.09 11.14 12.01 *
206.3632 -44.0794 18.0 -1 USNO-B1 20.91 17.85 19.21
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 63 in the list of sources is a candidate afterglow for 1121751_g332 with 3x3 stamp
ra=206.47277 (13:45:53.46) dec=-43.99877 (-43:59:55.6) +/- 1.1" mag=18.05+/-0.35
dist=216.6 REFID=47
*** The position of this source is inconsistent with the XRT position.
The position is 198.5 arc sec from the BAT position.
src: 63 distr. of nearby unmatched sources: 0 0 0 0 1
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
206.4677 -44.0007 15.0 -1 USNO-B1 18.42 17.56 17.94
206.4680 -44.0006 13.9 -1 USNO-B1 18.07 99.99 99.99
206.4696 -44.0009 11.3 -1 USNO-B1 20.16 12.93 16.14 *
206.4727 -44.0033 16.1 -1 USNO-B1 17.47 16.79 17.09
206.4711 -43.9996 5.1 -1 USNO-B1 13.69 12.93 13.27 *
206.4692 -43.9976 10.2 -1 USNO-B1 20.78 18.95 19.76
206.4791 -44.0013 18.7 -1 USNO-B1 17.77 17.45 17.59
206.4780 -43.9978 14.1 -1 USNO-B1 16.83 16.49 16.64
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 2 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
206.4113 -44.0370 8.0 -1 USNO-B1 19.77 19.11 19.40
206.4139 -44.0402 8.9 -1 USNO-B1 18.68 18.33 18.49
The closest star is 8.03" away.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 2 of trigger 1121751
------ Start for Possible Stand-alone Circular ----
In response to GRB220826 (Swift/BAT trigger 1121751) at 11:55:21 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
302 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 13:45:38.50 = 206.41043
DEC(J2000) = -44:02:19.6 = -44.03878
with a 90%-confidence error radius of about 0.69 arc sec. This position is 1.7
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.67 with a 1-sigma error of about 0.18. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.110.
------- notes for trigger 1121751 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220826d14h57m29s434215usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1121751
-expid=683208054 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1121751/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 683208054.39802 or about 2022:238:12:00:49 UT
Found 1268 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 22% of the srclist region. Found 78 sources in
srclist catalog. Found 8 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 16 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.06 mag. Found 210 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 22% of the Genie image region. The
closest srclist source has ra= 206.4229 dec= -44.0289 mag=18.14 sep=48.49".
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?
683208054 302 U srclist found no candidates.
683208054 302 U 206.41043 -44.03878 18.67/20.1 1.7 image Yes
List afterglow candidates for other finding charts.
683207842 90 WHITE 206.41045 -44.03867 18.73/19.2 2.0 srclist Yes
683207842 90 WHITE 206.41049 -44.03862 17.89/20.3 2.1 image Yes
683208611 859 ? srclist data are not available.
683208611 859 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -44.03878
GRB_ERROR: 0.69
GRB_RA: 206.41043
IMAGE_START_TIME: 12:00:49
MAGNITUDE: 18.67
MAG_ERROR: 0.18
MESSAGE_TYPE: ACK
SOURCE: XRT