srclist overlap message for exposure 3 of trigger 958141
uvot_overlap.pl vrs. 2010-12-20b fem started at 200224d16h22m35s060526usUT
The observation of trigger 958141 started 2020-02-24T03:39:34.8
Examining file ./958141_g884_uvot_sky_srclist.fits
The exposure ID is 604208374
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (248.8024,41.6741) with a roll angle of 98.6
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 (248.7940,41.6750) with a radius of 3.000 arc min
This is 0.381 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 (248.7665,41.6113) with a radius of 0.028 arc min
This is 4.096 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 958141
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200224d16h22m51s282889usUT
Observation start time is 2020-02-24T03:39:34.8
Examining file ./958141_g884_uvot_catalog_srclist.fits
The exposure ID is 604208374
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 102 detected source(s) for 958141_g884
Aspect correction adds 0.00163 degrees (0.391 sec of time = 4.38 arc sec) to RA
Aspect correction adds -0.00085 degrees (-3.06 arcsec) to Dec
Total aspect correction is 5.34 arcsec
Star catalogs centered at 248.8120 , 41.6777 with radius 8.89 arc min.
n_usno: 719 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 10.75946
RA DEC Mag Color
bright star 0: 248.68176 (16:34:43.62) 41.71903 (+41:43:08.5) 10.76 USNO-V
bright star 1: 248.96980 (16:35:52.75) 41.72926 (+41:43:45.3) 11.53 USNO-V
bright star 2: 248.80192 (16:35:12.46) 41.53861 (+41:32:19.0) 11.12 USNO-V
Mean distance difference (CAT_DELTA) for 74 matched entries is 0.719" for 958141_g884
Mean and std. dev of mag. difference (MAG_DELTA) are 1.810 and 0.741 for 958141_g884
Found 28 entries without IDs and 0 entries that are acceptable afterglow candidates for 958141_g884.
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.
22 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=248.7940 (16:35:10.56) DEC=41.6750 (+41:40:30.0)
XRT distances are from RA=248.7665 (16:35:03.97) DEC=41.6113 (+41:36:40.8)
*** WARNING 27 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 80:
ra=248.76814 dec= 41.57873 +/- 1.1" mag=19.72+/-0.35 dist=117.4 REFID=84
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 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 958141
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB200224 (Swift/BAT trigger 958141) at 03:24:49 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 861 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 none of
the XRT error circle. 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 0.00.
------- notes for trigger 958141 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200224d16h22m53s706469usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=958141
-expid=604208374 -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/958141/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 604208374.84796 or about 2020:055:03:39:29 UT
Found 715 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 102 sources in
srclist catalog. Found 28 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 4 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 20.91 mag. Found 47 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region.
Genie image analysis:
Found 39534.9 counts in the large background region of 6307.0 pixels or a rate
of 6.268 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 20.35 mag. for a
4-arcsec aperture. The closest srclist source has ra= 248.7658 dec= 41.5975
mag=18.96 sep=49.73". The closest Genie source has ra= 248.7893 dec= 41.6612
mag=21.17 sep=189.68".
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?
604208374 860 WHITE srclist found no candidates.
604208374 860 WHITE image found no candidates.
List afterglow candidates for other finding charts.
604207614 100 WHITE 248.76744 41.61182 18.45/19.2 3.0 srclist Yes
604207614 100 WHITE image found no candidates.
604207772 258 U 248.76775 41.61167 19.12/18.1 3.5 srclist Yes
604207772 258 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 41.61133
GRB_ERROR: 5
GRB_RA: 248.76654
IMAGE_START_TIME: 03:39:29
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT