srclist overlap message for exposure 2 of trigger 982707
uvot_overlap.pl vrs. 2010-12-20b fem started at 200717d05h33m18s423888usUT
The observation of trigger 982707 started 2020-07-16T23:03:12.9
Examining file ./982707_g330_uvot_sky_srclist.fits
The exposure ID is 616633392
The exposure time is undefined.
The filter is U.
The uvot region is centered at (196.0058,29.6454) with a roll angle of 283.9
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 (196.0130,29.6300) with a radius of 3.000 arc min
This is 0.996 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 (196.0103,29.6441) with a radius of 0.025 arc min
This is 0.246 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 982707
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200717d05h33m31s040863usUT
Observation start time is 2020-07-16T23:03:12.9
Examining file ./982707_g330_uvot_catalog_srclist.fits
The exposure ID is 616633392
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 6 detected source(s) for 982707_g330
Aspect correction adds -0.00062 degrees (-0.149 sec of time = -1.94 arc sec) to RA
Aspect correction adds -0.00055 degrees (-1.98 arcsec) to Dec
Total aspect correction is 2.77 arcsec
Star catalogs centered at 195.9801 , 29.6367 with radius 4.55 arc min.
n_usno: 119 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 6 matched entries is 0.560" for 982707_g330
Mean and std. dev of mag. difference (MAG_DELTA) are 0.452 and 1.748 for 982707_g330
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 982707_g330.
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=196.0130 (13:04:03.12) DEC=29.6300 (+29:37:48.0)
XRT distances are from RA=196.0103 (13:04:02.47) DEC=29.6441 (+29:38:38.6)
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
196.0098 29.6446 2.3 -1 USNO-B1 20.32 19.39 19.81
The closest star is 2.31" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=196.01013 (13:04:02.43) dec=29.64458 (+29:38:40.5) +/- 1.1" mag=16.41+/-0.35 dist=2.0 REFID=1
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",
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 982707
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB200716 (Swift/BAT trigger 982707) at 22:57:41 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
306 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
0.01.
------- notes for trigger 982707 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200717d05h33m33s681991usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=982707
-expid=616633392 -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/982707/
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 616633392.92574 or about 2020:198:23:03:07 UT
Found 115 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 6 sources in
srclist catalog. Found 0 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 3 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
20.58 mag. Found 24 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 13689.9 counts in the large background region of 6095.0 pixels or a rate
of 2.246 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 2288.4 counts in the XRT position region of 200.0 pixels or a rate of
11.442 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 7.360 +/- 0.194 (1-sigma) cps or
16.21 mag and a range from 16.18 to 16.24 mag. The 3-sigma UL at the XRT
position is 7.943 cps or 16.13 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 196.0101 dec= 29.6446 mag=16.41 sep=1.95".
The closest srclist source has ra= 196.0101 dec= 29.6446 mag=16.41 sep=1.95".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 196.0101 dec= 29.6446 mag=15.96 sep=1.97". The closest Genie
source has ra= 196.0101 dec= 29.6446 mag=15.96 sep=1.97".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 250 seconds with the U filter starting
306 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 13:04:02.42 = 196.01010
DEC(J2000) = +29:38:40.5 = 29.64458
with a 90%-confidence error radius of about 0.75 arc sec. This position is 1.97
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.96 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.01.
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?
616633392 305 U srclist found no candidates.
616633392 305 U image found no candidates.
List afterglow candidates for other finding charts.
616633179 92 WHITE srclist found no candidates.
616633179 92 WHITE image found no candidates.
616633947 860 WHITE srclist found no candidates.
616633947 860 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 29.64406
GRB_ERROR: 5
GRB_RA: 196.01029
IMAGE_START_TIME: 23:03:07
MAGNITUDE: 16.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT