srclist overlap message for exposure 2 of trigger 967774
uvot_overlap.pl vrs. 2010-12-20b fem started at 200425d07h43m03s636996usUT
The observation of trigger 967774 started 2020-04-25T00:20:59.6
Examining file ./967774_g277_uvot_sky_srclist.fits
The exposure ID is 609466859
The exposure time is undefined.
The filter is U.
The uvot region is centered at (85.2357,-13.4587) with a roll angle of 295.2
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 (85.2410,-13.4590) with a radius of 3.000 arc min
This is 0.313 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 (85.2195,-13.4351) with a radius of 0.027 arc min
This is 1.698 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 967774
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200425d07h43m14s414913usUT
Observation start time is 2020-04-25T00:20:59.6
Examining file ./967774_g277_uvot_catalog_srclist.fits
The exposure ID is 609466859
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 94 detected source(s) for 967774_g277
Aspect correction adds -0.00079 degrees (-0.190 sec of time = -2.77 arc sec) to RA
Aspect correction adds -0.00014 degrees (-0.50 arcsec) to Dec
Total aspect correction is 2.82 arcsec
Star catalogs centered at 85.2496 , -13.4553 with radius 8.66 arc min.
n_usno: 792 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 88 matched entries is 0.602" for 967774_g277
Mean and std. dev of mag. difference (MAG_DELTA) are 1.043 and 0.529 for 967774_g277
Found 6 entries without IDs and 0 entries that are acceptable afterglow candidates for 967774_g277.
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=85.2410 (05:40:57.84) DEC=-13.4590 (-13:27:32.4)
XRT distances are from RA=85.2195 (05:40:52.68) DEC=-13.4351 (-13:26:06.4)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 82:
ra= 85.23381 dec=-13.35095 +/- 1.1" mag=18.79+/-0.35 dist=307.1 REFID=73
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
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 967774
IMAGE PROBLEM: damaged image (high pixel value)
------ Start for Possible Stand-alone Circular ----
In response to GRB200425 (Swift/BAT trigger 967774) at 00:16:21 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
253 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image processing FAILED
because of damaged image (high pixel value). 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 0.16.
------- notes for trigger 967774 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200425d07h43m17s481498usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=967774
-expid=609466859 -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/967774/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
The Genie image appears to be DAMAGED with a max. value of 11630.
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 609466859.64936 or about 2020:116:00:20:54 UT
Found 788 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 94 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
18.12 mag.
Found 1 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 16.85 mag. Found 47 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region. The Genie image is INCOMPLETE with 16837 null pixels.
The closest srclist source has ra= 85.2076 dec= -13.4420 mag=17.60 sep=48.40".
The closest Genie source has ra= 85.2299 dec= -13.4638 mag= nan sep=109.41".
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?
609466859 252 U srclist found no candidates.
609466859 252 U image found no candidates.
List afterglow candidates for other finding charts.
609466700 93 WHITE srclist found no candidates.
609466700 93 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -13.43511
GRB_ERROR: 5
GRB_RA: 85.21950
IMAGE_START_TIME: 00:20:54
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT