srclist overlap message for exposure 3 of trigger 1154815
uvot_overlap.pl vrs. 2010-12-20b fem started at 230217d08h03m30s989611usUT
The observation of trigger 1154815 started 2023-02-16T15:03:31.0
Examining file ./1154815_g895_uvot_sky_srclist.fits
The exposure ID is 698252610
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (113.9609,-8.0181) with a roll angle of 240.7
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 (113.9660,-8.0150) with a radius of 3.000 arc min
This is 0.355 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 (113.9593,-8.0116) with a radius of 0.032 arc min
This is 0.404 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 1154815
find_uvot_ag.pl vrs. 2020-10-30 fem started at 230217d08h03m51s988741usUT
Observation start time is 2023-02-16T15:03:31.0
Examining file ./1154815_g895_uvot_catalog_srclist.fits
The exposure ID is 698252610
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1154815_g895
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.548
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1154815_g895 has mag 18.88
Aspect correction adds -0.00149 degrees (-0.358 sec of time = -5.31 arc sec) to RA
Aspect correction adds 0.00032 degrees ( 1.16 arcsec) to Dec
Total aspect correction is 5.44 arcsec
Star catalogs centered at 113.9604 , -8.0255 with radius 8.57 arc min.
n_usno: 2524 n_gsc: 0
*** WARNING -- bright star catalog has 8 entries brighter than 12 mag
The brightest has mag 8.89518
RA DEC Mag Color
bright star 0: 113.97245 (07:35:53.39) -8.01565 (-08:00:56.3) 8.90 USNO-V
bright star 1: 113.99026 (07:35:57.66) -8.01030 (-08:00:37.1) 10.93 USNO-V
bright star 2: 113.96648 (07:35:51.96) -8.06197 (-08:03:43.1) 10.79 USNO-V
bright star 3: 113.91069 (07:35:38.57) -7.95392 (-07:57:14.1) 11.25 USNO-V
bright star 4: 113.88366 (07:35:32.08) -7.95909 (-07:57:32.7) 9.79 USNO-V
bright star 5: 114.06668 (07:36:16.00) -8.03032 (-08:01:49.1) 9.15 USNO-V
bright star 6: 113.87064 (07:35:28.95) -8.08534 (-08:05:07.2) 11.79 USNO-V
bright star 7: 114.08550 (07:36:20.52) -8.01000 (-08:00:36.0) 11.84 USNO-V
Mean distance difference (CAT_DELTA) for 165 matched entries is 0.863" for 1154815_g895
Mean and std. dev of mag. difference (MAG_DELTA) are 1.406 and 0.571 for 1154815_g895
Found 30 entries without IDs and 0 entries that are acceptable afterglow candidates for 1154815_g895.
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.
24 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=113.9660 (07:35:51.84) DEC=-8.0150 (-08:00:54.0)
XRT distances are from RA=113.9593 (07:35:50.23) DEC=-8.0116 (-08:00:41.8)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 3:
ra=113.96766 dec= -8.01247 +/- 1.1" mag=18.88+/-0.35 dist=30.0 REFID=171
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
113.9590 -8.0126 3.8 -1 USNO-B1 16.07 15.70 15.87
The closest star is 3.84" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=113.95894 (07:35:50.14) dec=-8.01269 (-08:00:45.7) +/- 1.1" mag=16.90+/-0.35 dist=4.1 REFID=37
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 1154815
SRCLIST PROBLEM: srclist filled telemetry buffer
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB230216 (Swift/BAT trigger 1154815) at 14:48:34 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 865 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
0.198.
------- notes for trigger 1154815 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 230217d08h03m56s093119usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1154815
-expid=698252610 -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/1154815/
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 698252610.96978 or about 2023:047:15:03:25 UT
Found 2520 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 23% 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 19.22 mag.
Found 25 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 8 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.48 mag. Found 252 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 24% of the Genie image region. The
Genie image is INCOMPLETE with 880 null pixels.
Genie image analysis:
Found 75477.8 counts in the large background region of 5494.0 pixels or a rate
of 13.738 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 19.75 mag. for a
4-arcsec aperture.
Found 6597.3 counts in the XRT position region of 198.0 pixels or a rate of
33.320 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 29.495 +/- 0.557 (1-sigma) cps or
15.93 mag and a range from 15.91 to 15.95 mag. The 3-sigma UL at the XRT
position is 31.166 cps or 15.87 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.88 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 113.9589 dec= -8.0127 mag=16.90 sep=4.07".
The closest srclist source has ra= 113.9589 dec= -8.0127 mag=16.90 sep=4.07".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 113.9589 dec= -8.0125 mag=16.08 sep=3.67". The closest Genie
source has ra= 113.9589 dec= -8.0125 mag=16.08 sep=3.67".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 865 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 07:35:50.13 = 113.95889
DEC(J2000) = -08:00:45.2 = -8.01255
with a 90%-confidence error radius of about 0.61 arc sec. This position is 3.67
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.08 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.198.
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?
698252610 864 WHITE srclist found no candidates.
698252610 864 WHITE image found no candidates.
List afterglow candidates for other finding charts.
698251851 105 WHITE srclist found no candidates.
698251851 105 WHITE image found no candidates.
698252009 263 U srclist found no candidates.
698252009 263 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -8.01161
GRB_ERROR: 5
GRB_RA: 113.95929
IMAGE_START_TIME: 15:03:25
MAGNITUDE: 15.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT