srclist overlap message for exposure 3 of trigger 1101053
uvot_overlap.pl vrs. 2010-12-20b fem started at 220404d07h09m21s111216usUT
The observation of trigger 1101053 started 2022-04-03T20:57:45.2
Examining file ./1101053_g902_uvot_sky_srclist.fits
The exposure ID is 670712265
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (191.4660,89.1875) with a roll angle of 358.0
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (191.0250,89.1700) with a radius of 3.000 arc min
This is 1.115 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 (191.4734,89.1846) with a radius of 0.058 arc min
This is 0.173 arc min from the center of the uvot region
The area of the XRT error circle is 0.011 sq. arc min
The UVOT/XRT overlap is 0.011 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1101053
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220404d07h09m38s912370usUT
Observation start time is 2022-04-03T20:57:45.2
Examining file ./1101053_g902_uvot_catalog_srclist.fits
The exposure ID is 670712265
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 144 detected source(s) for 1101053_g902
Aspect correction adds -0.01966 degrees (-4.717 sec of time = -1.04 arc sec) to RA
Aspect correction adds 0.00165 degrees ( 5.95 arcsec) to Dec
Total aspect correction is 6.04 arcsec
Star catalogs centered at 191.5453 , 89.1836 with radius 8.78 arc min.
n_usno: 775 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 9.86202
RA DEC Mag Color
bright star 0: 185.65855 (12:22:38.05) 89.14454 (+89:08:40.3) 10.55 USNO-V
bright star 1: 199.63013 (13:18:31.23) 89.16182 (+89:09:42.6) 10.25 USNO-V
bright star 2: 196.97831 (13:07:54.79) 89.29799 (+89:17:52.7) 9.86 USNO-V
Mean distance difference (CAT_DELTA) for 76 matched entries is 0.803" for 1101053_g902
Mean and std. dev of mag. difference (MAG_DELTA) are 1.598 and 0.515 for 1101053_g902
Found 68 entries without IDs and 0 entries that are acceptable afterglow candidates for 1101053_g902.
Acceptable entries have no ID, XRT distances < 8.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
49 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=191.0250 (12:44:06.00) DEC=89.1700 (+89:10:12.0)
XRT distances are from RA=191.4734 (12:45:53.62) DEC=89.1846 (+89:11:04.6)
*** WARNING 47 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 37:
ra=186.97794 dec= 89.16339 +/- 1.1" mag=20.36+/-0.35 dist=248.3 REFID=139
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 19.22, XRT distances < 8.75",
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 3 of trigger 1101053
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB220403 (Swift/BAT trigger 1101053) at 20:42:42 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 873 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 none of
the XRT error circle. 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 mag. No correction has been made for the expected
extinction corresponding to E(B-V) of 0.208.
------- notes for trigger 1101053 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220404d07h09m41s627664usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1101053
-expid=670712265 -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/1101053/
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 670712265.21948 or about 2022:093:20:57:40 UT
Found 771 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 144 sources in
srclist catalog. Found 68 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 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 20.82 mag. Found 79 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region. The Genie image is INCOMPLETE with 16746 null pixels.
Genie image analysis:
Found 7855.8 counts in the large background region of 1075.0 pixels or a rate
of 7.308 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 20.10 mag. for a
4-arcsec aperture. The closest srclist source has ra= 192.5871 dec= 89.1959
mag=18.78 sep=69.32". The closest Genie source has ra= 190.0731 dec= 89.1868
mag=19.75 sep=71.99".
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?
670712265 873 WHITE srclist found no candidates.
670712265 873 WHITE image found no candidates.
List afterglow candidates for other finding charts.
670711496 104 WHITE srclist found no candidates.
670711496 104 WHITE 191.47207 89.18518 19.80/20.9 2.0 image Yes
670711709 317 U srclist found no candidates.
670711709 317 U 191.46643 89.18513 20.79/20.7 1.9 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 89.18461
GRB_ERROR: 8.75
GRB_RA: 191.47342
IMAGE_START_TIME: 20:57:40
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT