image overlap message for exposure 1 of trigger 915091
uvot_overlap.pl vrs. 2010-12-20b fem started at 190718d11h43m45s618982usUT
The observation of trigger 915091 started 2019-07-18T04:42:48.1
Examining file ./915091_g92_uvot_sky_image.fits
The exposure ID is 585117768
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (336.5360,-41.2235) with a roll angle of 109.2
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 (336.5310,-41.2210) with a radius of 3.000 arc min
This is 0.269 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
The XRT error circle is centered at (336.5761,-41.2045) with a radius of 0.028 arc min
This is 2.140 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 915091
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190718d11h43m51s699653usUT
Observation start time is 2019-07-18T04:42:48.1
Examining file ./915091_g92_uvot_catalog_image.fits
The exposure ID is 585117768
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 4 detected source(s) for 915091_g92
Aspect correction adds 0.00072 degrees (0.173 sec of time = 1.95 arc sec) to RA
Aspect correction adds -0.00131 degrees (-4.73 arcsec) to Dec
Total aspect correction is 5.12 arcsec
Star catalogs centered at 336.5313 , -41.2195 with radius 2.35 arc min.
n_usno: 38 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.665" for 915091_g92
Mean and std. dev of mag. difference (MAG_DELTA) are 1.353 and 0.601 for 915091_g92
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 915091_g92.
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=336.5310 (22:26:07.44) DEC=-41.2210 (-41:13:15.6)
XRT distances are from RA=336.5761 (22:26:18.26) DEC=-41.2045 (-41:12:16.1)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 47839.578 counts in the bkg source region of 6278.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 7.620 counts/pixel (5-sig UL in 4" is 20.25 mag) for 915091_g92
Do not compute counts in XRT region because position is too far from center.
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 20.80, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 915091_585117768_190718d11h43m51s699653usUT_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(336.5360,-41.2235,45")
fk5;-circle(336.552242456486,-41.2282917126705,6")
image paragraph message for exposure 1 of trigger 915091
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB190718 (Swift/BAT trigger 915091) at 04:41:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 69 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 0.01.
------- notes for trigger 915091 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190718d11h43m55s457195usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=915091
-expid=585117768 -meonly -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/915091/
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 585117768.11864 or about 2019:199:04:42:43 UT
Found 266 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 27 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 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 20.80 mag. Found 34 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 4% of the
Genie image region.
Genie image analysis:
Found 47839.6 counts in the large background region of 6278.0 pixels or a rate
of 7.620 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 20.25 mag. for a
4-arcsec aperture. The closest srclist source has ra= 336.5565 dec= -41.2127
mag=19.61 sep=60.66". The closest Genie source has ra= 336.5566 dec= -41.2125
mag=19.28 sep=60.19".
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?
585117768 69 WHITE srclist found no candidates.
585117768 69 WHITE image found no candidates.
List afterglow candidates for other finding charts.
585117980 281 U srclist found no candidates.
585117980 281 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -41.20447
GRB_ERROR: 5
GRB_RA: 336.57608
IMAGE_START_TIME: 04:42:43
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT