image overlap message for exposure 1 of trigger 1129775
uvot_overlap.pl vrs. 2010-12-20b fem started at 221017d04h14m26s622798usUT
The observation of trigger 1129775 started 2022-10-16T23:41:31.4
Examining file ./1129775_g126_uvot_sky_image.fits
The exposure ID is 687656491
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 19343 null pixels in the image.
The uvot region is centered at (38.9543,-34.6284) with a roll angle of 156.5
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 (38.9490,-34.6240) with a radius of 3.000 arc min
This is 0.374 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 at most 3.01 sq. arc min or 0.11 of the BAT error circle
The XRT error circle is centered at (38.9446,-34.6107) with a radius of 0.040 arc min
This is 1.166 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 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1129775
find_uvot_ag.pl vrs. 2020-10-30 fem started at 221017d04h14m33s791700usUT
Observation start time is 2022-10-16T23:41:31.4
Examining file ./1129775_g126_uvot_sources_image.fits
The exposure ID is 687656491
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 0 detected source(s) for 1129775_g126
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 38.9510 , -34.6210 with radius 2.00 arc min.
n_usno: 40 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1129775_g126.
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=38.9490 (02:35:47.76) DEC=-34.6240 (-34:37:26.4)
XRT distances are from RA=38.9446 (02:35:46.70) DEC=-34.6107 (-34:36:38.6)
Found 0 entries in star catalog(s) within 20" of the XRT position.
List UVOT sources within 20" of the XRT position:
There are 668.25366 counts in the bkg source region of 49.000000 pixels.
Rate in bkg region from 0 to 45 arcsec is 13.638 counts/pixel (5-sig UL in 4" is 19.93 mag) for 1129775_g126
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 20.49, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Results are questionable because aspect solution FAILED.
Region file: 1129775_687656491_221017d04h14m33s791700usUT_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(38.9543,-34.6284,45")
image paragraph message for exposure 1 of trigger 1129775
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB221016 (Swift/BAT trigger 1129775) at 23:39:24 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 97 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 0.026.
------- notes for trigger 1129775 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 221017d04h14m37s465202usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1129775
-expid=687656491 -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/1129775/
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 687656491.4184 or about 2022:289:23:41:26 UT
Found 232 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 18 sources in
srclist catalog. Found 3 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 0 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 20.49 mag. Found 36 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region. The Genie image is INCOMPLETE with 19343 null pixels.
Genie image analysis:
Found 668.3 counts in the large background region of 49.0 pixels or a rate of
13.639 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 19.76 mag. for a
4-arcsec aperture. The closest srclist source has ra= 38.9552 dec= -34.6031
mag=18.63 sep=41.76".
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?
687656491 96 WHITE srclist found no candidates.
687656491 96 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -34.61072
GRB_ERROR: 6
GRB_RA: 38.94458
IMAGE_START_TIME: 23:41:26
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT