srclist overlap message for exposure 2 of trigger 1115766
uvot_overlap.pl vrs. 2010-12-20b fem started at 220712d02h12m39s444723usUT
The observation of trigger 1115766 started 2022-07-11T18:22:23.4
Examining file ./1115766_g354_uvot_sky_srclist.fits
The exposure ID is 679256543
The exposure time is undefined.
The filter is U.
The uvot region is centered at (262.0154,24.6827) with a roll angle of 326.5
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 (261.9930,24.6690) with a radius of 3.000 arc min
This is 1.468 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 27.76 sq. arc min or 0.98 of the BAT error circle
The XRT error circle is centered at (262.0190,24.6810) with a radius of 0.035 arc min
This is 0.223 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 1115766
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220712d02h12m53s958114usUT
Observation start time is 2022-07-11T18:22:23.4
Examining file ./1115766_g354_uvot_catalog_srclist.fits
The exposure ID is 679256543
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 46 detected source(s) for 1115766_g354
Aspect correction adds -0.00151 degrees (-0.363 sec of time = -4.94 arc sec) to RA
Aspect correction adds 0.00153 degrees ( 5.51 arcsec) to Dec
Total aspect correction is 7.40 arcsec
Star catalogs centered at 262.0142 , 24.6824 with radius 6.22 arc min.
n_usno: 606 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 44 matched entries is 0.739" for 1115766_g354
Mean and std. dev of mag. difference (MAG_DELTA) are 1.069 and 0.729 for 1115766_g354
Found 4 entries without IDs and 1 entries that are acceptable afterglow candidates for 1115766_g354.
Acceptable entries have no ID, XRT distances < 5.25", 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=261.9930 (17:27:58.32) DEC=24.6690 (+24:40:08.4)
XRT distances are from RA=262.0190 (17:28:04.56) DEC=24.6810 (+24:40:51.5)
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1115766_g354 with 5x5 stamp
ra=262.03244 (17:28:07.79) dec=24.67409 (+24:40:26.7) +/- 1.1" mag=19.51+/-0.35
dist=50.5 REFID=42
*** The position of this source is inconsistent with the XRT position.
The position is 129.9 arc sec from the BAT position.
src: 1 distr. of nearby unmatched sources: 0 0 0 0 0
Found 3 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
262.0317 24.6742 2.4 -1 USNO-B1 17.64 16.41 16.96 *
262.0332 24.6732 3.9 -1 USNO-B1 20.31 18.59 19.36 *
262.0334 24.6734 4.0 -1 USNO-B1 18.65 19.54 19.14 *
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:
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, XRT distances < 5.25",
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 1115766
------ Start for Possible Stand-alone Circular ----
In response to GRB220711 (Swift/BAT trigger 1115766) at 18:16:28 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
325 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
0.067.
------- notes for trigger 1115766 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220712d02h12m56s508392usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1115766
-expid=679256543 -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/1115766/
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 679256543.39962 or about 2022:192:18:22:18 UT
Found 602 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 10% of the srclist region. Found 46 sources in
srclist catalog. Found 4 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 11 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 20.80 mag. Found 78 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
10% of the Genie image region.
Genie image analysis:
Found 8859.8 counts in the large background region of 5890.0 pixels or a rate
of 1.504 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 20.08 mag. for a
4-arcsec aperture.
Found 329.9 counts in the XRT position region of 201.0 pixels or a rate of
1.641 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.109 +/- 0.078 (1-sigma) cps or
20.58 mag and a range from 19.99 to 21.94 mag. The 3-sigma UL at the XRT
position is 0.343 cps or 19.33 mag. The closest srclist source has ra= 262.0107
dec= 24.6876 mag=18.89 sep=36.07". The closest Genie source has ra= 262.0150
dec= 24.6818 mag=19.82 sep=13.47".
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?
679256543 324 U srclist found no candidates.
679256543 324 U image found no candidates.
List afterglow candidates for other finding charts.
679256331 112 WHITE srclist found no candidates.
679256331 112 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 24.68097
GRB_ERROR: 5.25
GRB_RA: 262.01900
IMAGE_START_TIME: 18:22:18
MAGNITUDE: 19.3
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT