image overlap message for exposure 1 of trigger 931384
uvot_overlap.pl vrs. 2010-12-20b fem started at 191025d02h58m08s111419usUT
The observation of trigger 931384 started 2019-10-25T02:48:36.5
Examining file 931384_g109_uvot_sky_image.fits
The exposure ID is 593664516
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (320.7491,-48.3354) 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 0.401 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 1 of trigger 931384
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191025d02h58m09s112688usUT
Observation start time is 2019-10-25T02:48:36.5
Examining file 931384_g109_uvot_catalog_image.fits
The exposure ID is 593664516
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 931384_g109
Aspect correction adds -0.00143 degrees (-0.344 sec of time = -3.43 arc sec) to RA
Aspect correction adds -0.00026 degrees (-0.92 arcsec) to Dec
Total aspect correction is 3.55 arcsec
Star catalogs centered at 320.7586 , -48.3288 with radius 2.27 arc min.
n_usno: 42 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 3 matched entries is 1.345" for 931384_g109
Mean and std. dev of mag. difference (MAG_DELTA) are 3.198 and 1.581 for 931384_g109
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 931384_g109.
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 1.5958355E+05 counts in the bkg source region of 6309.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 25.295 counts/pixel (5-sig UL in 4" is 19.60 mag) for 931384_g109
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.59, 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_593664516_191025d02h58m09s112688usUT_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(320.7491,-48.3354,45")
fk5;-circle(320.76604688366,-48.3438560592366,6")
image paragraph message for exposure 1 of trigger 931384
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: partial overlap
SRCLIST PROBLEM: multiple afterglow candidates
See notes for more details.
------ 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 150 seconds with the White filter
starting 85 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 19.6 mag.
Processing for the 8'x8' region for the list of sources generated on-board
FAILED because of multiple afterglow candidates. 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 191025d02h58m10s135661usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=931384
-expid=593664516 -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 593664516.4512 or about 2019:298:02:48:31 UT
Found 280 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 31 sources in
srclist catalog. Found 9 srclist source(s) without IDs. There are 2 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag. More than 1 candidate indicates that the srclist candidates are
UNRELIABLE.
Found 3 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 19.59 mag. Found 38 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 159583.5 counts in the large background region of 6309.0 pixels or a rate
of 25.295 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 19.60 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?
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.
List afterglow candidates for other finding charts.
No unique and reliable afterglow was found.
------- Tokens for Quick GCN -------