image overlap message for exposure 1 of trigger 972614
uvot_overlap.pl vrs. 2010-12-20b fem started at 200516d15h20m09s706358usUT
The observation of trigger 972614 started 2020-05-16T15:04:56.6
Examining file ./972614_g87_uvot_sky_image.fits
The exposure ID is 611334296
The exposure time is 149.846 (seconds)
The filter is WHITE.
The uvot region is centered at (274.5545,-16.1934) with a roll angle of 79.2
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 (274.5500,-16.1930) with a radius of 3.000 arc min
This is 0.259 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 (274.5010,-16.1314) with a radius of 0.050 arc min
This is 4.833 arc min from the center of the uvot region
The area of the XRT error circle is 0.008 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 1 of trigger 972614
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200516d15h20m14s267471usUT
Observation start time is 2020-05-16T15:04:56.6
Examining file ./972614_g87_uvot_catalog_image.fits
The exposure ID is 611334296
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 37 detected source(s) for 972614_g87
Aspect correction adds 0.00210 degrees (0.504 sec of time = 7.26 arc sec) to RA
Aspect correction adds -0.00051 degrees (-1.84 arcsec) to Dec
Total aspect correction is 7.49 arcsec
Star catalogs centered at 274.5554 , -16.1917 with radius 2.67 arc min.
n_usno: 311 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.87716
RA DEC Mag Color
bright star 0: 274.55763 (18:18:13.83) -16.23140 (-16:13:53.1) 11.88 USNO-V
Mean distance difference (CAT_DELTA) for 35 matched entries is 0.420" for 972614_g87
Mean and std. dev of mag. difference (MAG_DELTA) are 1.191 and 0.369 for 972614_g87
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 972614_g87.
Acceptable entries have no ID, XRT distances < 7.5", 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=274.5500 (18:18:12.00) DEC=-16.1930 (-16:11:34.8)
XRT distances are from RA=274.5010 (18:18:00.23) DEC=-16.1314 (-16:07:53.0)
-----------------
Entry 18 in the list of sources is a candidate afterglow for 972614_g87 with genie
ra=274.53457 (18:18:08.30) dec=-16.18399 (-16:11:02.4) +/- 0.6" mag=18.30+/-0.15
dist=222.2 REFID=11 major=2.0 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 62.4 arc sec from the BAT position.
This source is near the edge of image (0.957)
Found 9 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
274.5353 -16.1872 11.7 -1 USNO-B1 15.57 13.98 14.68
274.5376 -16.1807 16.0 -1 USNO-B1 99.99 16.55 99.99
274.5379 -16.1797 19.1 -1 USNO-B1 19.54 16.36 17.77
274.5336 -16.1842 3.6 -1 USNO-B1 16.12 14.02 14.96 *
274.5352 -16.1787 19.2 -1 USNO-B1 17.78 14.50 15.96
274.5350 -16.1787 19.2 -1 USNO-B1 16.58 15.56 16.02
274.5319 -16.1837 9.3 -1 USNO-B1 18.32 99.99 99.99
274.5327 -16.1804 14.4 -1 USNO-B1 17.65 15.41 16.40
274.5309 -16.1806 17.6 -1 USNO-B1 20.41 18.81 19.52
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
-----------------
Entry 32 in the list of sources is a candidate afterglow for 972614_g87 with genie
ra=274.54359 (18:18:10.46) dec=-16.16745 (-16:10:02.8) +/- 0.9" mag=20.34+/-0.27
dist=196.4 REFID=2 major=0.7 minor=0.5 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 94.6 arc sec from the BAT position.
This source is near the edge of image (0.964)
Found 2 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
274.5440 -16.1668 2.8 -1 USNO-B1 19.07 15.84 17.28 *
274.5394 -16.1673 14.6 -1 USNO-B1 20.00 16.75 18.20
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 1.1854445E+05 counts in the bkg source region of 5254.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 22.563 counts/pixel (5-sig UL in 4" is 19.66 mag) for 972614_g87
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 20.21, XRT distances < 7.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 972614_611334296_200516d15h20m14s267471usUT_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(274.5545,-16.1934,45")
fk5;-circle(274.54667999377,-16.1928225953403,6")
fk5;-circle(274.551201494733,-16.1979727202272,6")
fk5;-circle(274.551701705246,-16.1869145398751,6")
fk5;-circle(274.557081020505,-16.191987244091,6")
fk5;-circle(274.54176000382,-16.193317192529,6")
fk5;-circle(274.559568317349,-16.1942213670678,6")
fk5;-circle(274.545398862572,-16.2040689194197,6")
fk5;-circle(274.555529932485,-16.1819700084414,6")
fk5;-circle(274.562042129945,-16.1882373641592,6")
fk5;-circle(274.56370042693,-16.1974293438096,6")
fk5;-circle(274.55828152879,-16.2050773282074,6")
fk5;-circle(274.565585506395,-16.1862471758968,6")
fk5;-circle(274.566286752107,-16.2018793958453,6")
image paragraph message for exposure 1 of trigger 972614
IMAGE PROBLEM: no overlap
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB200516 (Swift/BAT trigger 972614) at 15:03:28 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 62 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 none of the XRT error circle. No correction has been made for
the large, but uncertain, extinction expected.
------- notes for trigger 972614 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200516d15h20m27s286813usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=972614
-expid=611334296 -meonly -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/972614/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 611334296.57354 or about 2020:137:15:04:51 UT
Found 1785 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 30% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 17 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 37 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 20.21 mag. Found 307 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
29% of the Genie image region. The XRT position was OUTSIDE the star catalog
search region.
Genie image analysis:
Found 118544.4 counts in the large background region of 5254.0 pixels or a rate
of 22.563 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 19.66 mag. for a
4-arcsec aperture. The closest srclist source has ra= 274.5105 dec= -16.1399
mag=18.29 sep=44.90". The closest Genie source has ra= 274.5436 dec= -16.1674
mag=20.34 sep=196.43".
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?
611334296 62 WHITE srclist found no candidates.
611334296 62 WHITE image found no candidates.
List afterglow candidates for other finding charts.
611334509 275 U srclist found no candidates.
611334509 275 ? image data are not available.
------- Tokens for Quick GCN -------