srclist overlap message for exposure 1 of trigger 826428
uvot_overlap.pl vrs. 2010-12-20b fem started at 180418d10h22m17s367769usUT
The observation of trigger 826428 started 2018-04-18T07:35:53.1
Examining file ./826428_g3106_uvot_sky_srclist.fits
The exposure ID is 545729753
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (170.1101,24.9584) with a roll angle of 311.1
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 (170.1120,24.9560) with a radius of 3.000 arc min
This is 0.175 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 (170.1215,24.9331) with a radius of 0.030 arc min
This is 1.640 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 826428
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180418d10h22m19s981614usUT
Observation start time is 2018-04-18T07:35:53.1
Examining file ./826428_g3106_uvot_catalog_srclist.fits
The exposure ID is 545729753
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 14 detected source(s) for 826428_g3106
Aspect correction adds -0.00015 degrees (-0.036 sec of time = -0.49 arc sec) to RA
Aspect correction adds 0.00077 degrees ( 2.77 arcsec) to Dec
Total aspect correction is 2.81 arcsec
Star catalogs centered at 170.1229 , 24.9599 with radius 5.53 arc min.
n_usno: 121 n_gsc: 150
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 12 matched entries is 0.516" for 826428_g3106
Mean and std. dev of mag. difference (MAG_DELTA) are 1.267 and 0.303 for 826428_g3106
Found 2 entries without IDs and 0 entries that are acceptable afterglow candidates for 826428_g3106.
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=170.1120 (11:20:26.88) DEC=24.9560 (+24:57:21.6)
XRT distances are from RA=170.1215 (11:20:29.17) DEC=24.9331 (+24:55:59.1)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 9:
ra=170.17349 dec= 24.97817 +/- 1.1" mag=20.27+/-0.35 dist=234.7 REFID=13
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 826428
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB180418 (Swift/BAT trigger 826428) at 06:44:06 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 3086 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
none of the XRT error circle. 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 0.02.
------- notes for trigger 826428 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180418d10h22m31s836730usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=826428
-expid=545729753 -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/826428/
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 545729753.05172 or about 2018:108:07:35:48 UT
Found 149 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 14 sources in
srclist catalog. Found 2 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 1 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.67 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. The XRT position was OUTSIDE the star catalog search
region.
Genie image analysis:
Found 61745.8 counts in the large background region of 6307.0 pixels or a rate
of 9.790 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 20.11 mag. for a
4-arcsec aperture. The closest srclist source has ra= 170.1339 dec= 24.9273
mag=18.98 sep=45.43". The closest Genie source has ra= 170.0995 dec= 24.9724
mag=20.66 sep=158.82".
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?
545729753 3086 WHITE srclist found no candidates.
545729753 3086 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 24.93308
GRB_ERROR: 5
GRB_RA: 170.12154
IMAGE_START_TIME: 07:35:48
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT