srclist paragraph message for exposure 4 of trigger 1040123
------ Start for Possible Stand-alone Circular ----
In response to GRB210402 (Swift/BAT trigger 1040123) at 22:03:17 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 878 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 19.6 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 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.018.
------- notes for trigger 1040123 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250909d16h53m17s974058usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1040123
-expid=639094702 -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/1040123/
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 639094702.51878 or about 2021:092:22:18:17 UT
Found 377 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 159 sources in
srclist catalog. Found 130 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 10 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.91 mag. Found 43 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
4% of the Genie image region.
Genie image analysis:
Found 37272.8 counts in the large background region of 5970.0 pixels or a rate
of 6.243 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 20.18 mag. for a
4-arcsec aperture.
Found 1266.1 counts in the XRT position region of 198.0 pixels or a rate of
6.394 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.167 +/- 0.256 (1-sigma) cps or
21.54 mag and a range from 20.53 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.936 cps or 19.67 mag. The closest srclist source has ra= 198.2659
dec= 44.5101 mag=19.78 sep=23.40". The closest Genie source has ra= 198.2648
dec= 44.5094 mag=18.04 sep=23.24".
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?
639094702 878 WHITE srclist found no candidates.
639094702 878 WHITE image found no candidates.
List afterglow candidates for other finding charts.
639093986 162 WHITE srclist found no candidates.
639093986 162 WHITE image found no candidates.
639094145 321 U srclist found no candidates.
639094145 321 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 44.51453
GRB_ERROR: 5
GRB_RA: 198.25925
IMAGE_START_TIME: 22:18:17
MAGNITUDE: 19.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT