image overlap message for exposure 1 of trigger 971846
uvot_overlap.pl vrs. 2010-12-20b fem started at 200513d04h30m13s610765usUT
The observation of trigger 971846 started 2020-05-12T20:34:58.8
Examining file ./971846_g102_uvot_sky_image.fits
The exposure ID is 611008498
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 24770 null pixels in the image.
The uvot region is centered at (7.4174,-2.2043) with a roll angle of 62.0
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 (7.3960,-2.1990) with a radius of 3.000 arc min
This is 1.320 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 at most 0.36 sq. arc min or 0.01 of the BAT error circle
The XRT error circle is centered at (7.4147,-2.2104) with a radius of 0.023 arc min
This is 0.394 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 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 971846
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200513d04h30m19s306324usUT
Observation start time is 2020-05-12T20:34:58.8
Examining file ./971846_g102_uvot_catalog_image.fits
The exposure ID is 611008498
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 971846_g102
Aspect correction adds 0.00048 degrees (0.116 sec of time = 1.74 arc sec) to RA
Aspect correction adds 0.00143 degrees ( 5.16 arcsec) to Dec
Total aspect correction is 5.44 arcsec
Star catalogs centered at 7.4229 , -2.1891 with radius 2.00 arc min.
n_usno: 45 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 0 matched entries is 0.000" for 971846_g102
Mean and std. dev of mag. difference (MAG_DELTA) are 0.000 and -1.000 for 971846_g102
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 971846_g102.
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= 7.3960 (00:29:35.04) DEC=-2.1990 (-02:11:56.4)
XRT distances are from RA= 7.4147 (00:29:39.54) DEC=-2.2104 (-02:12:37.3)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 971846_g102 with genie
ra=7.41986 (00:29:40.77) dec=-2.18246 (-02:10:56.9) +/- 1.1" mag=13.64+/-0.35
dist=102.1 REFID=1 major=25.8 minor=1.0 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 104.5 arc sec from the BAT position.
This source is near the edge of image (0.999)
Found 1 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
7.4188 -2.1833 4.7 -1 USNO-B1 20.96 19.53 20.16 *
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 1 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
7.4143 -2.2122 6.8 -1 USNO-B1 20.89 19.66 20.21
The closest star is 6.80" away.
List UVOT sources within 10" of the XRT position:
There are 0.0000000 counts in the bkg source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt_bkg source region of 0.0000000 pixels.
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 19.42, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 971846_611008498_200513d04h30m19s306324usUT_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(7.4174,-2.2043,45")
Region file: 971846_611008498_200513d04h30m19s306324usUT_xrt.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(7.41475,-2.21036,8")
Region file: 971846_611008498_200513d04h30m19s306324usUT_xrt_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(7.41475,-2.21036,25")
fk5;-circle(7.41475,-2.21036,15")
image paragraph message for exposure 1 of trigger 971846
IMAGE PROBLEM: incomplete image, no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB200512 (Swift/BAT trigger 971846) at 20:33:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 77 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 0.03.
------- notes for trigger 971846 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200513d04h30m22s838675usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=971846
-expid=611008498 -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/971846/
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.
UVOT exposure began at MET 611008498.83144 or about 2020:133:20:34:53 UT
Found 230 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 10 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
19.22 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 19.42 mag. Found 41 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 24770 null pixels.
Found no Genie image background information. The closest srclist source has ra=
7.3917 dec= -2.2129 mag=15.51 sep=83.56". The closest Genie source has ra=
7.4199 dec= -2.1825 mag=13.64 sep=102.09".
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?
611008498 77 WHITE srclist found no candidates.
611008498 77 WHITE image found no candidates.
List afterglow candidates for other finding charts.
611008656 235 U srclist found no candidates.
611008656 235 U image found no candidates.
611009283 862 ? srclist data are not available.
611009283 862 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -2.21036
GRB_ERROR: 5
GRB_RA: 7.41475
IMAGE_START_TIME: 20:34:53
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT