srclist overlap message for exposure 2 of trigger 846740
uvot_overlap.pl vrs. 2010-12-20b fem started at 180708d13h48m05s800118usUT
The observation of trigger 846740 started 2018-07-08T13:39:32.1
Examining file 846740_g353_uvot_sky_srclist.fits
The exposure ID is 552749972
The exposure time is undefined.
The filter is U.
The uvot region is centered at (198.9141,41.8971) with a roll angle of 287.8
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 (198.9190,41.8970) with a radius of 3.000 arc min
This is 0.220 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
Could not find the location of an XRT error circle
srclist afterglow message for exposure 2 of trigger 846740
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180708d13h48m06s527179usUT
Observation start time is 2018-07-08T13:39:32.1
Examining file 846740_g353_uvot_catalog_srclist.fits
The exposure ID is 552749972
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 173 detected source(s) for 846740_g353
Aspect correction adds -0.00099 degrees (-0.237 sec of time = -2.65 arc sec) to RA
Aspect correction adds 0.00004 degrees ( 0.16 arcsec) to Dec
Total aspect correction is 2.65 arcsec
Star catalogs centered at 198.9155 , 41.9200 with radius 8.27 arc min.
n_usno: 683 n_gsc: 1438
*** WARNING -- bright star catalog has 12 entries brighter than 12 mag
The brightest has mag 8.84
RA DEC Mag Color
bright star 0: 198.98095 (13:15:55.43) 42.00853 (+42:00:30.7) 11.92 USNO-B
bright star 1: 198.91332 (13:15:39.20) 42.02120 (+42:01:16.3) 11.47 USNO-B
bright star 2: 198.97956 (13:15:55.09) 42.00939 (+42:00:33.8) 10.82 USNO-B
bright star 3: 198.99337 (13:15:58.41) 42.00793 (+42:00:28.6) 10.90 USNO-V
bright star 4: 198.95675 (13:15:49.62) 42.03145 (+42:01:53.2) 8.84 USNO-R
bright star 5: 198.95792 (13:15:49.90) 42.03204 (+42:01:55.4) 9.28 USNO-V
bright star 6: 198.91465 (13:15:39.52) 42.04059 (+42:02:26.1) 10.83 USNO-B
bright star 7: 198.97282 (13:15:53.48) 42.03317 (+42:01:59.4) 9.77 USNO-V
bright star 8: 198.91170 (13:15:38.81) 42.04203 (+42:02:31.3) 11.11 USNO-V
bright star 9: 198.92307 (13:15:41.54) 42.04309 (+42:02:35.1) 10.17 USNO-V
bright star 10: 198.92489 (13:15:41.97) 42.04402 (+42:02:38.5) 10.31 USNO-V
bright star 11: 198.87583 (13:15:30.20) 42.05371 (+42:03:13.4) 9.31 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 27 matched entries is 0.850" for 846740_g353
Mean and std. dev of mag. difference (MAG_DELTA) are 1.509 and 1.475 for 846740_g353
Found 148 entries without IDs and 0 entries that are acceptable afterglow candidates for 846740_g353.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
133 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=198.9190 (13:15:40.56) DEC=41.8970 (+41:53:49.2)
XRT distances are as reported in catalog file.
*** WARNING 85 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to BAT position is no. 12:
ra=198.96996 dec= 41.96043 +/- 1.1" mag=18.87+/-0.35 dist=266.0 REFID=50
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 17.56, BAT distances < 200",
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 2 of trigger 846740
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB180708 (Swift/BAT trigger 846740) at 13:33:38 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
332 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 25% of the
BAT error circle. The typical 3-sigma upper limit has been about 19.2 mag. The
8'x8' region for the list of sources generated on-board covers 100% of the BAT
error circle. The list of sources is typically complete to about 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.02.
------- notes for trigger 846740 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180708d13h48m09s877308usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=846740
-expid=552749972 -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/846740/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. No XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 552749972.07406 or about 2018:189:13:39:27 UT
Found 1401 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 14% of the srclist region. Found 173 sources in
srclist catalog. Found 148 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.56 mag.
Found 2 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 20.13 mag. Found 58 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 8% of the
Genie image region.
Genie image analysis:
Found 11441.4 counts in the large background region of 6210.0 pixels or a rate
of 1.842 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 20.17 mag. for a
4-arcsec aperture.
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?
552749972 332 U srclist found no candidates.
552749972 332 U image found no candidates.
List afterglow candidates for other finding charts.
552749813 173 WHITE srclist found no candidates.
552749813 173 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 41.89700
GRB_ERROR: 200
GRB_RA: 198.91900
IMAGE_START_TIME: 13:39:27
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT