srclist overlap message for exposure 2 of trigger 805318
uvot_overlap.pl vrs. 2010-12-20b fem started at 180115d10h48m01s347415usUT
The observation of trigger 805318 started 2018-01-15T04:21:22.7
Examining file ./805318_g318_uvot_sky_srclist.fits
The exposure ID is 537682882
The exposure time is undefined.
The filter is U.
The uvot region is centered at (12.0359,-15.6311) with a roll angle of 252.6
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 (12.0730,-15.6080) with a radius of 3.000 arc min
This is 2.554 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 23.89 sq. arc min or 0.84 of the BAT error circle
The XRT error circle is centered at (12.0388,-15.6306) with a radius of 0.028 arc min
This is 0.167 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 2 of trigger 805318
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180115d10h48m09s519824usUT
Observation start time is 2018-01-15T04:21:22.7
Examining file ./805318_g318_uvot_catalog_srclist.fits
The exposure ID is 537682882
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 13 detected source(s) for 805318_g318
Aspect correction adds 0.00012 degrees (0.029 sec of time = 0.42 arc sec) to RA
Aspect correction adds -0.00104 degrees (-3.75 arcsec) to Dec
Total aspect correction is 3.78 arcsec
Star catalogs centered at 12.0384 , -15.6272 with radius 5.59 arc min.
n_usno: 135 n_gsc: 159
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 12 matched entries is 0.723" for 805318_g318
Mean and std. dev of mag. difference (MAG_DELTA) are 1.236 and 0.594 for 805318_g318
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 805318_g318.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=12.0730 (00:48:17.52) DEC=-15.6080 (-15:36:28.8)
XRT distances are from RA=12.0388 (00:48:09.30) DEC=-15.6306 (-15:37:50.3)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 805318_g318 with 5x5 stamp
ra=12.03864 (00:48:09.27) dec=-15.63063 (-15:37:50.3) +/- 1.1" mag=16.65+/-0.35
dist=0.4 REFID=4
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 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)
##### This source remains a candidate #####
It has no entries 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:
Unmatched source ra=12.03864 (00:48:09.27) dec=-15.63063 (-15:37:50.3) +/- 1.1" mag=16.65+/-0.35 dist=0.4 REFID=4
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 18.12, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
srclist paragraph message for exposure 2 of trigger 805318
------ Start for Possible Stand-alone Circular ----
In response to GRB180115 (Swift/BAT trigger 805318) at 04:16:03 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
298 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 00:48:09.27 = 12.03863
DEC(J2000) = -15:37:50.2 = -15.63062
with a 90%-confidence error radius of about 0.75 arc sec. This position is 0.4
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.26 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.02.
------- notes for trigger 805318 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180115d10h48m11s427078usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=805318
-expid=537682882 -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/805318/
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 537682882.7287 or about 2018:015:04:21:17 UT
Found 159 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 13 sources in
srclist catalog. Found 1 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 1 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.35 mag. Found 16 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 2% of the Genie image region.
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?
537682882 298 U 12.03864 -15.63063 16.65/18.1 0.4 srclist Yes
537682882 298 U 12.03863 -15.63062 16.26/20.4 0.4 image Yes
List afterglow candidates for other finding charts.
537682724 140 WHITE 12.03853 -15.63064 18.06/19.2 0.8 srclist Yes
537682724 140 WHITE 12.03856 -15.63051 17.54/20.5 0.8 image Yes
537683463 879 WHITE 12.03865 -15.63049 17.74/19.2 0.9 srclist Yes
537683463 879 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -15.63062
GRB_ERROR: 0.75
GRB_RA: 12.03863
IMAGE_START_TIME: 04:21:17
MAGNITUDE: 16.26
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT