srclist overlap message for exposure 2 of trigger 1120270
uvot_overlap.pl vrs. 2010-12-20b fem started at 220814d02h21m18s593529usUT
The observation of trigger 1120270 started 2022-08-13T19:27:51.5
Examining file ./1120270_g287_uvot_sky_srclist.fits
The exposure ID is 682111671
The exposure time is undefined.
The filter is U.
The uvot region is centered at (81.5328,-33.0131) with a roll angle of 61.8
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 (81.5010,-32.9850) with a radius of 3.000 arc min
This is 2.325 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 25.18 sq. arc min or 0.89 of the BAT error circle
The XRT error circle is centered at (81.5315,-33.0169) with a radius of 0.033 arc min
This is 0.235 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 1120270
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220814d02h21m30s224876usUT
Observation start time is 2022-08-13T19:27:51.5
Examining file ./1120270_g287_uvot_catalog_srclist.fits
The exposure ID is 682111671
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 62 detected source(s) for 1120270_g287
Aspect correction adds 0.00068 degrees (0.163 sec of time = 2.05 arc sec) to RA
Aspect correction adds -0.00039 degrees (-1.42 arcsec) to Dec
Total aspect correction is 2.49 arcsec
Star catalogs centered at 81.5323 , -33.0136 with radius 6.33 arc min.
n_usno: 584 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 9.59964
RA DEC Mag Color
bright star 0: 81.57783 (05:26:18.68) -33.01153 (-33:00:41.5) 11.37 USNO-V
bright star 1: 81.48362 (05:25:56.07) -33.07416 (-33:04:27.0) 11.19 USNO-V
bright star 2: 81.42799 (05:25:42.72) -33.00428 (-33:00:15.4) 9.60 USNO-V
Mean distance difference (CAT_DELTA) for 31 matched entries is 0.937" for 1120270_g287
Mean and std. dev of mag. difference (MAG_DELTA) are 1.621 and 1.364 for 1120270_g287
Found 31 entries without IDs and 2 entries that are acceptable afterglow candidates for 1120270_g287.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
26 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=81.5010 (05:26:00.24) DEC=-32.9850 (-32:59:06.0)
XRT distances are from RA=81.5315 (05:26:07.55) DEC=-33.0169 (-33:01:00.8)
*** WARNING 50 per cent of entries have no IDs.
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1120270_g287 with 3x3 stamp
ra=81.49281 (05:25:58.27) dec=-33.03935 (-33:02:21.7) +/- 1.1" mag=19.98+/-0.35
dist=141.9 REFID=62
*** The position of this source is inconsistent with the XRT position.
The position is 197.2 arc sec from the BAT position.
src: 6 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
81.4865 -33.0392 18.9 -1 USNO-B1 19.31 17.96 18.56
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 24 in the list of sources is a candidate afterglow for 1120270_g287 with 5x5 stamp
ra=81.52685 (05:26:06.44) dec=-32.95439 (-32:57:15.8) +/- 1.1" mag=18.74+/-0.35
dist=225.4 REFID=27
*** The position of this source is inconsistent with the XRT position.
The position is 135.0 arc sec from the BAT position.
src: 24 srclist_match has ID
src: 24 distr. of nearby unmatched sources: 0 1 0 0 0
Found 19 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
81.5287 -32.9570 10.9 -1 USNO-B1 21.56 18.63 19.93
81.5306 -32.9564 13.6 -1 USNO-B1 20.28 19.50 19.85
81.5285 -32.9551 5.6 -1 USNO-B1 17.55 15.04 16.15
81.5300 -32.9549 9.6 -1 USNO-B1 18.13 18.89 18.55
81.5271 -32.9544 0.6 -1 USNO-B1 18.48 14.54 16.29 *
81.5268 -32.9538 2.0 -1 USNO-B1 13.51 11.44 12.36 *
81.5264 -32.9536 3.0 -1 USNO-B1 14.61 99.99 99.99 *
81.5323 -32.9533 17.1 -1 USNO-B1 20.51 20.42 20.46
81.5261 -32.9526 6.9 -1 USNO-B1 17.58 17.60 17.59
81.5230 -32.9528 13.0 -1 USNO-B1 99.99 19.34 99.99
81.5254 -32.9524 8.2 -1 USNO-B1 99.99 15.55 99.99
81.5252 -32.9520 9.9 -1 USNO-B1 13.44 14.32 13.93
81.5249 -32.9518 11.0 -1 USNO-B1 99.99 14.97 99.99
81.5251 -32.9514 12.0 -1 USNO-B1 14.62 16.52 15.68
81.5247 -32.9512 13.1 -1 USNO-B1 99.99 17.08 99.99
81.5260 -32.9511 12.1 -1 USNO-B1 19.25 99.99 99.99
81.5230 -32.9510 17.1 -1 USNO-B1 11.35 18.82 15.50 *
81.5236 -32.9505 17.0 -1 USNO-B1 18.30 18.35 18.33
81.5236 -32.9498 19.0 -1 USNO-B1 19.09 19.25 19.18
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
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",
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 1120270
------ Start for Possible Stand-alone Circular ----
In response to GRB220813 (Swift/BAT trigger 1120270) at 19:23:03 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
258 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the
XRT error circle. The typical 3-sigma upper limit has been about 19.2 mag. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. The list of sources is typically complete to about 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.022.
------- notes for trigger 1120270 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220814d02h21m32s543540usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1120270
-expid=682111671 -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/1120270/
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 682111671.49178 or about 2022:225:19:27:46 UT
Found 580 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 10% of the srclist region. Found 62 sources in
srclist catalog. Found 31 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 4 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.53 mag. Found 65 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 8% of the
Genie image region.
Genie image analysis:
Found 15447.7 counts in the large background region of 6226.0 pixels or a rate
of 2.481 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 19.80 mag. for a
4-arcsec aperture.
Found 491.6 counts in the XRT position region of 199.0 pixels or a rate of
2.470 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.005 +/- 0.095 (1-sigma) cps or
23.88 mag and a range from 20.66 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.292 cps or 19.51 mag. The closest srclist source has ra= 81.5356
dec= -33.0022 mag=15.89 sep=54.36". The closest Genie source has ra= 81.5355
dec= -33.0020 mag=15.08 sep=54.98".
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?
682111671 257 U srclist found no candidates.
682111671 257 U image found no candidates.
List afterglow candidates for other finding charts.
682111513 99 WHITE 81.53153 -33.01664 19.90/19.2 0.9 srclist Yes
682111513 99 WHITE 81.53155 -33.01636 19.61/20.7 1.9 image Yes
682112273 859 WHITE srclist found no candidates.
682112273 859 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -33.01689
GRB_ERROR: 5
GRB_RA: 81.53146
IMAGE_START_TIME: 19:27:46
MAGNITUDE: 19.5
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT