srclist overlap message for exposure 1 of trigger 848048
uvot_overlap.pl vrs. 2010-12-20b fem started at 180715d19h37m48s551993usUT
The observation of trigger 848048 started 2018-07-15T19:19:18.6
Examining file 848048_g4332_uvot_sky_srclist.fits
The exposure ID is 553375158
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (235.0646,-0.9231) with a roll angle of 294.0
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 (235.0690,-0.9250) with a radius of 3.000 arc min
This is 0.285 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 1 of trigger 848048
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180715d19h37m49s591498usUT
Observation start time is 2018-07-15T19:19:18.6
Examining file 848048_g4332_uvot_catalog_srclist.fits
The exposure ID is 553375158
The exposure is 149.880 sec.
The bin size is 2 pixels
The filter is WHITE
There are 175 detected source(s) for 848048_g4332
Aspect correction adds 0.00069 degrees (0.166 sec of time = 2.49 arc sec) to RA
Aspect correction adds -0.00028 degrees (-1.02 arcsec) to Dec
Total aspect correction is 2.69 arcsec
Star catalogs centered at 235.0597 , -0.9232 with radius 5.80 arc min.
n_usno: 311 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 8.15488
RA DEC Mag Color
bright star 0: 235.10659 (15:40:25.58) -0.91244 (-00:54:44.8) 8.15 USNO-V
bright star 1: 235.01384 (15:40:03.32) -0.95727 (-00:57:26.2) 11.45 USNO-V
bright star 2: 234.98908 (15:39:57.38) -0.85806 (-00:51:29.0) 10.22 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 41 matched entries is 0.869" for 848048_g4332
Mean and std. dev of mag. difference (MAG_DELTA) are 1.812 and 2.096 for 848048_g4332
Found 135 entries without IDs and 2 entries that are acceptable afterglow candidates for 848048_g4332.
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.
128 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=235.0690 (15:40:16.56) DEC=-0.9250 (-00:55:30.0)
XRT distances are as reported in catalog file.
*** WARNING 77 per cent of entries have no IDs.
-----------------
Entry 4 in the list of sources is a candidate afterglow for 848048_g4332 with 1x1 stamp
ra=235.04384 (15:40:10.52) dec=-0.91010 (-00:54:36.3) +/- 1.1" mag=19.35+/-0.35
dist=105.3 REFID=166
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
235.0426 -0.9098 4.6 -1 USNO-B1 20.83 19.29 19.97
235.0403 -0.9113 13.5 -1 USNO-B1 13.67 12.12 12.81 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 116 in the list of sources is a candidate afterglow for 848048_g4332 with 1x1 stamp
ra=235.11545 (15:40:27.71) dec=-0.93611 (-00:56:10.0) +/- 1.1" mag=19.35+/-0.35
dist=171.9 REFID=170
src: 116 distr. of nearby unmatched sources: 0 0 0 0 1
Found 3 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
235.1112 -0.9394 19.3 -1 USNO-B1 13.31 11.37 12.23 *
235.1141 -0.9394 12.7 -1 USNO-B1 20.75 18.67 19.59
235.1169 -0.9374 6.9 -1 USNO-B1 20.18 18.92 19.48
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.66, 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 1 of trigger 848048
------ Start for Possible Stand-alone Circular ----
In response to GRB180715 (Swift/BAT trigger 848048) at 18:07:05 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 4312 seconds after the BAT trigger. No credible afterglow candidate
has been found in the initial data products. Results 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 BAT 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 0.13.
------- notes for trigger 848048 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180715d19h37m51s384976usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=848048
-expid=553375158 -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/848048/
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. BAT position found.
UVOT exposure began at MET 553375158.59624 or about 2018:196:19:19:13 UT
Found 307 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 175 sources in
srclist catalog. Found 135 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
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?
553375158 4311 WHITE srclist found no candidates.
553375158 4311 WHITE image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -0.92500
GRB_ERROR: 200
GRB_RA: 235.06900
IMAGE_START_TIME: 19:19:13
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT