srclist overlap message for exposure 3 of trigger 956824
uvot_overlap.pl vrs. 2010-12-20b fem started at 200216d19h52m22s520923usUT
The observation of trigger 956824 started 2020-02-16T13:47:24.0
Examining file ./956824_g889_uvot_sky_srclist.fits
The exposure ID is 603553643
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (160.4406,19.4597) with a roll angle of 57.7
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 (160.4610,19.4540) with a radius of 3.000 arc min
This is 1.203 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 (160.4347,19.4752) with a radius of 0.028 arc min
This is 0.989 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 3 of trigger 956824
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200216d19h52m36s673999usUT
Observation start time is 2020-02-16T13:47:24.0
Examining file ./956824_g889_uvot_catalog_srclist.fits
The exposure ID is 603553643
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 30 detected source(s) for 956824_g889
Aspect correction adds -0.00053 degrees (-0.127 sec of time = -1.80 arc sec) to RA
Aspect correction adds 0.00045 degrees ( 1.63 arcsec) to Dec
Total aspect correction is 2.42 arcsec
Star catalogs centered at 160.4440 , 19.4641 with radius 9.11 arc min.
n_usno: 524 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 27 matched entries is 0.879" for 956824_g889
Mean and std. dev of mag. difference (MAG_DELTA) are 1.668 and 1.008 for 956824_g889
Found 6 entries without IDs and 1 entries that are acceptable afterglow candidates for 956824_g889.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=160.4610 (10:41:50.64) DEC=19.4540 (+19:27:14.4)
XRT distances are from RA=160.4347 (10:41:44.32) DEC=19.4752 (+19:28:30.6)
-----------------
Entry 1 in the list of sources is a candidate afterglow for 956824_g889 with 5x5 stamp
ra=160.41637 (10:41:39.93) dec=19.46521 (+19:27:54.8) +/- 1.1" mag=20.48+/-0.35
dist=71.7 REFID=29
*** The position of this source is inconsistent with the XRT position.
The position is 156.8 arc sec from the BAT position.
src: 1 distr. of nearby unmatched sources: 0 0 0 0 1
Found 0 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)
*** If XRT position is correct, then this is NOT the afterglow
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 19.22, 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 3 of trigger 956824
------ Start for Possible Stand-alone Circular ----
In response to GRB200216 (Swift/BAT trigger 956824) at 13:32:33 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 865 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
0.02.
------- notes for trigger 956824 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200216d19h52m39s006913usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=956824
-expid=603553643 -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/956824/
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 603553643.96942 or about 2020:047:13:47:18 UT
Found 520 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 30 sources in
srclist catalog. Found 6 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 6 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 20.62 mag. Found 40 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.
Genie image analysis:
Found 66100.2 counts in the large background region of 6202.0 pixels or a rate
of 10.658 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 20.07 mag. for a
4-arcsec aperture.
Found 2030.8 counts in the XRT position region of 198.0 pixels or a rate of
10.257 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.435 +/- 0.325 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.975 cps or 19.81 mag. The closest srclist
source has ra= 160.4544 dec= 19.4809 mag=15.08 sep=70.13". The closest Genie
source has ra= 160.4423 dec= 19.4769 mag=19.84 sep=26.46".
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?
603553643 864 WHITE srclist found no candidates.
603553643 864 WHITE image found no candidates.
List afterglow candidates for other finding charts.
603552902 123 WHITE srclist found no candidates.
603552902 123 WHITE image found no candidates.
603553114 335 ? srclist data are not available.
603553114 335 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 19.47517
GRB_ERROR: 5
GRB_RA: 160.43467
IMAGE_START_TIME: 13:47:18
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT