srclist overlap message for exposure 2 of trigger 931484
uvot_overlap.pl vrs. 2010-12-20b fem started at 191025d18h29m46s121422usUT
The observation of trigger 931484 started 2019-10-25T18:21:22.0
Examining file 931484_g309_uvot_sky_srclist.fits
The exposure ID is 593720482
The exposure time is undefined.
The filter is U.
The uvot region is centered at (139.7762,1.3822) with a roll angle of 103.4
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 (139.7710,1.3840) with a radius of 3.000 arc min
This is 0.328 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 931484
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191025d18h29m47s008955usUT
Observation start time is 2019-10-25T18:21:22.0
Examining file 931484_g309_uvot_catalog_srclist.fits
The exposure ID is 593720482
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 43 detected source(s) for 931484_g309
Aspect correction adds 0.00135 degrees (0.323 sec of time = 4.85 arc sec) to RA
Aspect correction adds -0.00140 degrees (-5.04 arcsec) to Dec
Total aspect correction is 6.99 arcsec
Star catalogs centered at 139.7494 , 1.3861 with radius 8.42 arc min.
n_usno: 481 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 37 matched entries is 0.559" for 931484_g309
Mean and std. dev of mag. difference (MAG_DELTA) are 1.787 and 0.547 for 931484_g309
Found 6 entries without IDs and 0 entries that are acceptable afterglow candidates for 931484_g309.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=139.7710 (09:19:05.04) DEC= 1.3840 (+01:23:02.4)
XRT distances are as reported in catalog file.
Found NO acceptable entries.
Unidentified entry closest to BAT position is no. 13:
ra=139.83360 dec= 1.37272 +/- 1.1" mag=19.32+/-0.35 dist=228.9 REFID=43
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 931484
------ Start for Possible Stand-alone Circular ----
In response to GRB191025 (Swift/BAT trigger 931484) at 18:16:12 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of nominal 250.000 seconds with the U filter
starting 285 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 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 0.03.
------- notes for trigger 931484 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191025d18h29m48s226158usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=931484
-expid=593720482 -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/931484/
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.
No XRT position found for srclist. BAT position found.
UVOT exposure began at MET 593720482.02716 or about 2019:298:18:21:17 UT
Found 477 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 43 sources in
srclist catalog. Found 6 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.56 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?
593720482 285 U srclist found no candidates.
593720482 285 ? image data are not available.
List afterglow candidates for other finding charts.
593720270 73 WHITE 139.78775 1.36526 20.00/18.7 90.5 srclist Yes
593720270 73 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 1.38400
GRB_ERROR: 200
GRB_RA: 139.77100
IMAGE_START_TIME: 18:21:17
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT