image overlap message for exposure 2 of trigger 960986
uvot_overlap.pl vrs. 2010-12-20b fem started at 200312d21h39m20s923105usUT
The observation of trigger 960986 started 2020-03-12T21:21:51.8
Examining file 960986_g303_uvot_sky_image.fits
The exposure ID is 605740911
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (274.4757,-16.0995) with a roll angle of 89.7
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (274.4710,-16.1020) with a radius of 3.000 arc min
This is 0.311 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (274.5006,-16.1312) with a radius of 0.043 arc min
This is 2.383 arc min from the center of the uvot region
The area of the XRT error circle is 0.006 sq. arc min
The UVOT/XRT overlap is 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 960986
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200312d21h39m22s050669usUT
Observation start time is 2020-03-12T21:21:51.8
Examining file 960986_g303_uvot_catalog_image.fits
The exposure ID is 605740911
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 21 detected source(s) for 960986_g303
Aspect correction adds 0.00164 degrees (0.394 sec of time = 5.68 arc sec) to RA
Aspect correction adds 0.00002 degrees ( 0.08 arcsec) to Dec
Total aspect correction is 5.68 arcsec
Star catalogs centered at 274.4766 , -16.0993 with radius 2.59 arc min.
n_usno: 315 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.60322
RA DEC Mag Color
bright star 0: 274.45239 (18:17:48.57) -16.08993 (-16:05:23.8) 10.81 USNO-V
bright star 1: 274.49509 (18:17:58.82) -16.11858 (-16:07:06.9) 10.60 USNO-V
Mean distance difference (CAT_DELTA) for 20 matched entries is 0.507" for 960986_g303
Mean and std. dev of mag. difference (MAG_DELTA) are 1.801 and 0.731 for 960986_g303
Found 2 entries without IDs and 0 entries that are acceptable afterglow candidates for 960986_g303.
Acceptable entries have no ID, XRT distances < 6.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=274.4710 (18:17:53.04) DEC=-16.1020 (-16:06:07.2)
XRT distances are from RA=274.5006 (18:18:00.14) DEC=-16.1312 (-16:07:52.3)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 16:
ra=274.49068 dec=-16.11576 +/- 0.6" mag=15.12+/-0.14 dist=65.3 REFID=1 flag=16
Found 2 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
274.4995 -16.1332 8.0 -1 USNO-B1 19.68 16.75 18.05
274.5027 -16.1330 9.7 -1 USNO-B1 19.41 17.21 18.19
The closest star is 8.00" away.
List UVOT sources within 10" of the XRT position:
There are 55617.469 counts in the bkg source region of 5632.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 9.875 counts/pixel (5-sig UL in 4" is 19.22 mag) for 960986_g303
Do not compute counts in XRT region because position is too far from center.
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 19.78, XRT distances < 6.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 960986_605740911_200312d21h39m22s050669usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(274.4757,-16.0995,45")
fk5;-circle(274.469523590257,-16.1013325577087,6")
fk5;-circle(274.463277885162,-16.0972156553693,6")
fk5;-circle(274.479379284054,-16.1068352730797,6")
fk5;-circle(274.476574026688,-16.0935409782721,6")
fk5;-circle(274.481001765384,-16.0908415370802,6")
fk5;-circle(274.486726930508,-16.101799898997,6")
fk5;-circle(274.48879791249,-16.0979927638684,6")
image paragraph message for exposure 2 of trigger 960986
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB200312 (Swift/BAT trigger 960986) at 21:16:47 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
280 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 limiting magnitude for the list of
sources is expected to be about 17.8. No correction has been made for the
large, but uncertain, extinction expected.
------- notes for trigger 960986 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200312d21h39m23s791067usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=960986
-expid=605740911 -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/960986/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 605740911.75072 or about 2020:072:21:21:46 UT
Found 3882 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 33% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 30 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 21 source(s) in Genie image catalog. Found 2 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.78 mag. Found 311 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
32% of the Genie image region.
Genie image analysis:
Found 55617.5 counts in the large background region of 5632.0 pixels or a rate
of 9.875 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 19.26 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 17.89 mag. The closest srclist
source has ra= 274.5012 dec= -16.1344 mag=17.28 sep=11.55". The closest Genie
source has ra= 274.4907 dec= -16.1158 mag=15.12 sep=65.31".
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?
605740911 279 U srclist found no candidates.
605740911 279 U image found no candidates.
List afterglow candidates for other finding charts.
605740699 67 WHITE srclist found no candidates.
605740699 67 WHITE image found no candidates.
------- Tokens for Quick GCN -------