image overlap message for exposure 2 of trigger 931384
uvot_overlap.pl vrs. 2010-12-20b fem started at 191025d03h15m55s669405usUT
The observation of trigger 931384 started 2019-10-25T02:52:08.2
Examining file 931384_g321_uvot_sky_image.fits
The exposure ID is 593664728
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (320.7504,-48.3334) with a roll angle of 246.0
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (320.7550,-48.3300) with a radius of 3.000 arc min
This is 0.277 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 7.17 sq. arc min or 0.25 of the BAT error circle
Could not find the location of an XRT error circle
image afterglow message for exposure 2 of trigger 931384
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191025d03h15m56s573377usUT
Observation start time is 2019-10-25T02:52:08.2
Examining file 931384_g321_uvot_catalog_image.fits
The exposure ID is 593664728
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 4 detected source(s) for 931384_g321
Aspect correction adds -0.00118 degrees (-0.283 sec of time = -2.83 arc sec) to RA
Aspect correction adds -0.00067 degrees (-2.40 arcsec) to Dec
Total aspect correction is 3.71 arcsec
Star catalogs centered at 320.7563 , -48.3311 with radius 2.49 arc min.
n_usno: 51 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.73808
RA DEC Mag Color
bright star 0: 320.73536 (21:22:56.49) -48.31404 (-48:18:50.5) 11.74 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.434" for 931384_g321
Mean and std. dev of mag. difference (MAG_DELTA) are 2.687 and 2.115 for 931384_g321
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 931384_g321.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=320.7550 (21:23:01.20) DEC=-48.3300 (-48:19:48.0)
XRT distances are as reported in catalog file.
There are 27023.260 counts in the bkg source region of 6307.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 4.285 counts/pixel (5-sig UL in 4" is 19.67 mag) for 931384_g321
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.67, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 931384_593664728_191025d03h15m56s573377usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(320.7504,-48.3334,45")
image paragraph message for exposure 2 of trigger 931384
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB191025 (Swift/BAT trigger 931384) at 02:46:46 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
297 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
0.03.
------- notes for trigger 931384 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191025d03h15m57s557168usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=931384
-expid=593664728 -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/931384/
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 593664728.20598 or about 2019:298:02:52:03 UT
Found 669 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 41 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.
Found 4 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 19.67 mag. Found 47 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.
Genie image analysis:
Found 27023.3 counts in the large background region of 6307.0 pixels or a rate
of 4.285 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 19.71 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?
593664728 297 U 320.76020 -48.29301 18.94/17.6 133.7 srclist Yes
593664728 297 U 320.75881 -48.29055 19.18/17.6 142.3 srclist Yes
593664728 297 U 320.82006 -48.34701 19.62/17.6 167.3 srclist Yes
593664728 297 U image found no candidates.
List afterglow candidates for other finding charts.
593664516 85 WHITE 320.76080 -48.29282 17.91/18.7 134.6 srclist Yes
593664516 85 WHITE 320.78780 -48.34593 18.52/18.7 97.2 srclist Yes
593664516 85 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -48.33000
GRB_ERROR: 200
GRB_RA: 320.75500
IMAGE_START_TIME: 02:52:03
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT