image overlap message for exposure 2 of trigger 1202386
uvot_overlap.pl vrs. 2010-12-20b fem started at 231215d00h54m53s630548usUT
The observation of trigger 1202386 started 2023-12-14T21:31:03.5
Examining file ./1202386_g3994_uvot_sky_image.fits
The exposure ID is 724282263
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (305.7153,-72.4330) with a roll angle of 308.8
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 (305.7360,-72.4360) with a radius of 3.000 arc min
This is 0.415 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 (305.6853,-72.4328) with a radius of 0.037 arc min
This is 0.544 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1202386
find_uvot_ag.pl vrs. 2023-04-25a fem started at 231215d00h55m03s895747usUT
Observation start time is 2023-12-14T21:31:03.5
Examining file ./1202386_g3994_uvot_catalog_image.fits
The exposure ID is 724282263
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 14 detected source(s) for 1202386_g3994
Aspect correction adds -0.00057 degrees (-0.137 sec of time = -0.62 arc sec) to RA
Aspect correction adds 0.00211 degrees ( 7.61 arcsec) to Dec
Total aspect correction is 7.63 arcsec
Star catalogs centered at 305.7164 , -72.4303 with radius 2.62 arc min.
n_usno: 140 n_gsc: 90
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 13 matched entries is 0.420" for 1202386_g3994
Mean and std. dev of mag. difference (MAG_DELTA) are 1.236 and 0.486 for 1202386_g3994
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1202386_g3994.
Acceptable entries have no ID, XRT distances < 5.5", 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=305.7360 (20:22:56.64) DEC=-72.4360 (-72:26:09.6)
XRT distances are from RA=305.6853 (20:22:44.47) DEC=-72.4328 (-72:25:58.2)
-----------------
Entry 12 in the list of sources is a candidate afterglow for 1202386_g3994 with genie
ra=305.73400 (20:22:56.16) dec=-72.40874 (-72:24:31.5) +/- 0.8" mag=20.01+/-0.24
dist=101.6 REFID=2 major=0.7 minor=0.4 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 98.1 arc sec from the BAT position.
This source is near the edge of image (0.887)
Found 3 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
305.7316 -72.4125 13.7 -1 USNO-B1 21.06 20.28 20.63
305.7328 -72.4074 4.9 -1 USNO-B1 16.19 15.54 15.83 *
305.7327 -72.4074 5.0 -1 GSC2.3 15.39 16.54 99.99 *
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 1.6703223E+05 counts in the bkg source region of 5981.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 27.927 counts/pixel (5-sig UL in 4" is 19.54 mag) for 1202386_g3994
There are 5691.1694 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 28.314 counts/pixel for 1202386_g3994
There are 32489.816 counts in the xrt_bkg source region of 1162.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 27.960 counts/pixel (5-sig UL in 4" is 19.54 mag) for 1202386_g3994
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 20.10, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1202386_724282263_231215d00h55m03s895747usUT_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(305.7153,-72.4330,45")
fk5;-circle(305.731968024067,-72.4384020582061,6")
fk5;-circle(305.711195009898,-72.427723711178,6")
fk5;-circle(305.686934892983,-72.4389232417768,6")
Region file: 1202386_724282263_231215d00h55m03s895747usUT_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(305.68529,-72.43283,8")
Region file: 1202386_724282263_231215d00h55m03s895747usUT_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(305.68529,-72.43283,25")
fk5;-circle(305.68529,-72.43283,15")
fk5;-circle(305.686934892983,-72.4389232417768,6")
image paragraph message for exposure 2 of trigger 1202386
------ Start for Possible Stand-alone Circular ----
In response to GRB231214 (Swift/BAT trigger 1202386) at 20:24:28 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 3962 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
100% of the XRT error circle. The typical 3-sigma upper limit has been about
19.6 mag. 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 0.060.
------- notes for trigger 1202386 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 231215d00h55m07s636366usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1202386
-expid=724282263 -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/1202386/
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 724282263.54964 or about 2023:348:21:30:58 UT
Found 831 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 14% of the srclist region. Found 39 sources in
srclist catalog. Found 2 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 14 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 20.10 mag. Found 136 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
13% of the Genie image region.
Genie image analysis:
Found 167032.2 counts in the large background region of 5981.0 pixels or a rate
of 27.927 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 19.37 mag. for a
4-arcsec aperture.
Found 5691.2 counts in the XRT position region of 201.0 pixels or a rate of
28.314 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.475 +/- 0.544 (1-sigma) cps or
20.41 mag and a range from 19.58 to 99.99 mag. The 3-sigma UL at the XRT
position is 2.107 cps or 18.80 mag. The closest srclist source has ra= 305.6876
dec= -72.4386 mag=18.02 sep=21.08". The closest Genie source has ra= 305.6869
dec= -72.4389 mag=16.93 sep=22.01".
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?
724282263 3962 WHITE srclist found no candidates.
724282263 3962 WHITE image found no candidates.
List afterglow candidates for other finding charts.
724278743 442 WHITE srclist found no candidates.
724278743 442 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -72.43283
GRB_ERROR: 5.5
GRB_RA: 305.68529
IMAGE_START_TIME: 21:30:58
MAGNITUDE: 18.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT