srclist overlap message for exposure 1 of trigger 956824
uvot_overlap.pl vrs. 2010-12-20b fem started at 200216d19h52m21s336858usUT
The observation of trigger 956824 started 2020-02-16T13:35:02.8
Examining file ./956824_g148_uvot_sky_srclist.fits
The exposure ID is 603552902
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (160.4631,19.4589) with a roll angle of 57.7
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 (160.4610,19.4540) with a radius of 3.000 arc min
This is 0.318 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 1.883 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 1 of trigger 956824
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200216d19h52m25s643912usUT
Observation start time is 2020-02-16T13:35:02.8
Examining file ./956824_g148_uvot_catalog_srclist.fits
The exposure ID is 603552902
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 13 detected source(s) for 956824_g148
Aspect correction adds -0.00074 degrees (-0.177 sec of time = -2.51 arc sec) to RA
Aspect correction adds 0.00052 degrees ( 1.86 arcsec) to Dec
Total aspect correction is 3.12 arcsec
Star catalogs centered at 160.4600 , 19.4669 with radius 4.99 arc min.
n_usno: 171 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 14 matched entries is 0.972" for 956824_g148
Mean and std. dev of mag. difference (MAG_DELTA) are 1.306 and 1.235 for 956824_g148
Found 2 entries without IDs and 1 entries that are acceptable afterglow candidates for 956824_g148.
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 3 in the list of sources is a candidate afterglow for 956824_g148 with 5x5 stamp
ra=160.42130 (10:41:41.11) dec=19.49451 (+19:29:40.2) +/- 1.1" mag=19.54+/-0.35
dist=83.1 REFID=12
*** The position of this source is inconsistent with the XRT position.
The position is 198.6 arc sec from the BAT position.
src: 3 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
160.4230 19.4945 5.9 -1 USNO-B1 18.11 17.59 17.82
160.4226 19.4947 4.6 -1 USNO-B1 17.94 99.99 99.99
160.4207 19.4958 5.1 -1 USNO-B1 15.43 14.09 14.68
*** 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 1 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 124 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 200216d19h52m33s484649usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=956824
-expid=603552902 -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 603552902.822 or about 2020:047:13:34:57 UT
Found 167 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 13 sources in
srclist catalog. Found 2 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 9 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 53 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 63731.0 counts in the large background region of 5969.0 pixels or a rate
of 10.677 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 20.06 mag. for a
4-arcsec aperture.
Found 2082.0 counts in the XRT position region of 201.0 pixels or a rate of
10.358 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.380 +/- 0.329 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.987 cps or 19.79 mag. The closest srclist
source has ra= 160.4544 dec= 19.4810 mag=15.23 sep=70.16". The closest Genie
source has ra= 160.4423 dec= 19.4767 mag=19.71 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?
603552902 123 WHITE srclist found no candidates.
603552902 123 WHITE image found no candidates.
List afterglow candidates for other finding charts.
603553114 335 ? srclist data are not available.
603553114 335 U image found no candidates.
603553643 864 WHITE srclist found no candidates.
603553643 864 WHITE 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: 13:34:57
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT