srclist overlap message for exposure 3 of trigger 1061687
uvot_overlap.pl vrs. 2010-12-20b fem started at 210726d21h25m05s591355usUT
The observation of trigger 1061687 started 2021-07-26T19:34:08.3
Examining file ./1061687_g904_uvot_sky_srclist.fits
The exposure ID is 649020848
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (193.3347,19.1854) with a roll angle of 282.4
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 (193.3420,19.1850) with a radius of 3.000 arc min
This is 0.413 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 (193.2909,19.1903) with a radius of 0.040 arc min
This is 2.500 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1061687
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210726d21h25m22s435080usUT
Observation start time is 2021-07-26T19:34:08.3
Examining file ./1061687_g904_uvot_catalog_srclist.fits
The exposure ID is 649020848
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 23 detected source(s) for 1061687_g904
Aspect correction adds -0.00133 degrees (-0.319 sec of time = -4.52 arc sec) to RA
Aspect correction adds -0.00040 degrees (-1.45 arcsec) to Dec
Total aspect correction is 4.75 arcsec
Star catalogs centered at 193.3556 , 19.1634 with radius 8.18 arc min.
n_usno: 461 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 23 matched entries is 0.466" for 1061687_g904
Mean and std. dev of mag. difference (MAG_DELTA) are 0.836 and 0.400 for 1061687_g904
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1061687_g904.
Acceptable entries have no ID, XRT distances < 6", 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=193.3420 (12:53:22.08) DEC=19.1850 (+19:11:06.0)
XRT distances are from RA=193.2909 (12:53:09.82) DEC=19.1903 (+19:11:25.1)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 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 < 6",
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 3 of trigger 1061687
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB210726 (Swift/BAT trigger 1061687) at 19:19:03 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 877 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 0.020.
------- notes for trigger 1061687 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210726d21h25m24s500144usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1061687
-expid=649020848 -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/1061687/
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 649020848.2573 or about 2021:207:19:34:03 UT
Found 457 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 23 sources in
srclist catalog. Found 0 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 2 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 20.53 mag. Found 29 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region.
Genie image analysis:
Found 76951.4 counts in the large background region of 6113.0 pixels or a rate
of 12.588 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 19.80 mag. for a
4-arcsec aperture. The closest srclist source has ra= 193.3164 dec= 19.2156
mag=17.59 sep=125.75". The closest Genie source has ra= 193.3379 dec= 19.1894
mag=17.82 sep=159.91".
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?
649020848 876 WHITE srclist found no candidates.
649020848 876 WHITE image found no candidates.
List afterglow candidates for other finding charts.
649020036 64 ? srclist data are not available.
649020036 64 WHITE image found no candidates.
649020247 275 U srclist found no candidates.
649020247 275 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 19.19031
GRB_ERROR: 6
GRB_RA: 193.29092
IMAGE_START_TIME: 19:34:03
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT