srclist overlap message for exposure 1 of trigger 989458
uvot_overlap.pl vrs. 2010-12-20b fem started at 200816d04h13m10s426607usUT
The observation of trigger 989458 started 2020-08-16T04:09:26.7
Examining file 989458_g123_uvot_sky_srclist.fits
The exposure ID is 619243766
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (202.4528,-22.5909) with a roll angle of 297.6
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 (202.4610,-22.5900) with a radius of 3.000 arc min
This is 0.455 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
Could not find the location of an XRT error circle
srclist afterglow message for exposure 1 of trigger 989458
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200816d04h13m12s079593usUT
Observation start time is 2020-08-16T04:09:26.7
Examining file 989458_g123_uvot_catalog_srclist.fits
The exposure ID is 619243766
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 47 detected source(s) for 989458_g123
Aspect correction adds -0.00163 degrees (-0.392 sec of time = -5.43 arc sec) to RA
Aspect correction adds 0.00005 degrees ( 0.17 arcsec) to Dec
Total aspect correction is 5.43 arcsec
Star catalogs centered at 202.4440 , -22.5895 with radius 6.21 arc min.
n_usno: 539 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 11.26202
RA DEC Mag Color
bright star 0: 202.42385 (13:29:41.72) -22.61559 (-22:36:56.1) 11.26 USNO-V
bright star 1: 202.36222 (13:29:26.93) -22.52501 (-22:31:30.1) 11.38 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 48 matched entries is 0.608" for 989458_g123
Mean and std. dev of mag. difference (MAG_DELTA) are 1.089 and 0.874 for 989458_g123
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 989458_g123.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=202.4610 (13:29:50.64) DEC=-22.5900 (-22:35:24.0)
XRT distances are as reported in catalog file.
-----------------
Entry 6 in the list of sources is a candidate afterglow for 989458_g123 with 3x3 stamp
ra=202.45942 (13:29:50.26) dec=-22.55476 (-22:33:17.1) +/- 1.1" mag=19.78+/-0.35
dist=127.0 REFID=47
src: 6 distr. of nearby unmatched sources: 0 0 0 0 0
Found 2 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
202.4568 -22.5512 15.5 -1 USNO-B1 14.05 12.88 13.40 *
202.4593 -22.5512 12.7 -1 USNO-B1 20.65 19.05 19.76
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.66, BAT distances < 200",
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 989458
------ Start for Possible Stand-alone Circular ----
In response to GRB200816 (Swift/BAT trigger 989458) at 04:07:22 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of nominal 150.000 seconds with the White
filter starting 98 seconds after the BAT trigger. No credible afterglow
candidate has been found in the initial data products. Data from the 2.7'x2.7'
sub-image are not available at this time. The 8'x8' region for the list of
sources generated on-board covers 100% of the BAT 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 0.10.
------- notes for trigger 989458 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200816d04h13m14s335326usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=989458
-expid=619243766 -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/989458/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
*** Warning -- no exposure found, using srclist assumed value.
No XRT position found for srclist. BAT position found.
UVOT exposure began at MET 619243766.68904 or about 2020:229:04:09:21 UT
Found 535 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 47 sources in
srclist catalog. Found 1 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
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?
619243766 98 WHITE srclist found no candidates.
619243766 98 ? image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -22.59000
GRB_ERROR: 200
GRB_RA: 202.46100
IMAGE_START_TIME: 04:09:21
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT