srclist overlap message for exposure 1 of trigger 1175438
uvot_overlap.pl vrs. 2010-12-20b fem started at 230618d21h42m12s613800usUT
The observation of trigger 1175438 started 2023-06-18T03:54:01.4
Examining file ./1175438_g168_uvot_sky_srclist.fits
The exposure ID is 708753241
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (196.5820,3.3066) with a roll angle of 295.7
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (196.5880,3.3060) with a radius of 3.000 arc min
This is 0.361 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 (196.6031,3.3035) with a radius of 0.033 arc min
This is 1.279 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 1 of trigger 1175438
find_uvot_ag.pl vrs. 2023-04-25a fem started at 230618d21h42m28s398239usUT
Observation start time is 2023-06-18T03:54:01.4
Examining file ./1175438_g168_uvot_catalog_srclist.fits
The exposure ID is 708753241
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 20 detected source(s) for 1175438_g168
Aspect correction adds -0.00178 degrees (-0.428 sec of time = -6.41 arc sec) to RA
Aspect correction adds -0.00005 degrees (-0.17 arcsec) to Dec
Total aspect correction is 6.41 arcsec
Star catalogs centered at 196.5922 , 3.3180 with radius 5.84 arc min.
n_usno: 142 n_gsc: 128
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.36362
RA DEC Mag Color
bright star 0: 196.61590 (13:06:27.82) 3.41112 (+03:24:40.0) 11.36 USNO-V
Mean distance difference (CAT_DELTA) for 17 matched entries is 0.702" for 1175438_g168
Mean and std. dev of mag. difference (MAG_DELTA) are 1.597 and 0.438 for 1175438_g168
Found 3 entries without IDs and 1 entries that are acceptable afterglow candidates for 1175438_g168.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=196.5880 (13:06:21.12) DEC= 3.3060 (+03:18:21.6)
XRT distances are from RA=196.6031 (13:06:24.75) DEC= 3.3035 (+03:18:12.6)
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1175438_g168 with 5x5 stamp
ra=196.61003 (13:06:26.41) dec=3.26891 (+03:16:08.1) +/- 1.1" mag=19.31+/-0.35
dist=127.0 REFID=16
*** The position of this source is inconsistent with the XRT position.
The position is 155.2 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 0 0 0 0 0
Found 2 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
196.6096 3.2684 2.3 -1 USNO-B1 18.65 17.66 18.10 *
196.6096 3.2684 2.5 -1 GSC2.3 17.68 18.65 18.19 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 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 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 1 of trigger 1175438
------ Start for Possible Stand-alone Circular ----
In response to GRB230618 (Swift/BAT trigger 1175438) at 03:51:12 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of nominal 150.000 seconds with the White
filter starting 137 seconds after the BAT trigger. No credible afterglow
candidate has been found in the initial data products. Data from the 2.7'x2.7'
sub-image are not available at this time. 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 0.025.
------- notes for trigger 1175438 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230618d21h42m29s531396usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1175438
-expid=708753241 -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/1175438/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
*** Warning -- no exposure found, using srclist assumed value.
XRT position found for srclist. BAT position found.
UVOT exposure began at MET 708753241.39862 or about 2023:169:03:53:56 UT
Found 138 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 2% of the srclist region. Found 20 sources in
srclist catalog. Found 3 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
The closest srclist source has ra= 196.6085 dec= 3.3254 mag=18.70 sep=81.26".
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?
708753241 136 WHITE srclist found no candidates.
708753241 136 ? image data are not available.
List afterglow candidates for other finding charts.
708753976 871 WHITE srclist found no candidates.
708753976 871 WHITE image found no candidates.
708763711 10606 U srclist found no candidates.
708763711 10606 U image found no candidates.
708763968 10863 B srclist found no candidates.
708763968 10863 B image found no candidates.
708764224 11119 ? srclist data are not available.
708764224 11119 UVW2 image found no candidates.
708764480 11375 V srclist found no candidates.
708764480 11375 V image found no candidates.
708764735 11630 ? srclist data are not available.
708764735 11630 UVM2 image found no candidates.
708764990 11885 UVW1 srclist found no candidates.
708764990 11885 UVW1 image found no candidates.
708765245 12140 U srclist found no candidates.
708765245 12140 U image found no candidates.
708765500 12395 B srclist found no candidates.
708765500 12395 B image found no candidates.
708765757 12652 ? srclist data are not available.
708765757 12652 UVW2 image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 3.30350
GRB_ERROR: 5
GRB_RA: 196.60313
IMAGE_START_TIME: 03:53:56
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT