image overlap message for exposure 3 of trigger 1076121
uvot_overlap.pl vrs. 2010-12-20b fem started at 211001d01h23m21s444636usUT
The observation of trigger 1076121 started 2021-10-01T00:58:09.7
Examining file 1076121_g889_uvot_sky_image.fits
The exposure ID is 654742689
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (71.4765,12.0416) with a roll angle of 87.7
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 (71.4700,12.0400) with a radius of 3.000 arc min
This is 0.395 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 3 of trigger 1076121
find_uvot_ag.pl vrs. 2020-10-30 fem started at 211001d01h23m23s815048usUT
Observation start time is 2021-10-01T00:58:09.7
Examining file 1076121_g889_uvot_catalog_image.fits
The exposure ID is 654742689
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 9 detected source(s) for 1076121_g889
Aspect correction adds 0.00121 degrees (0.290 sec of time = 4.25 arc sec) to RA
Aspect correction adds -0.00011 degrees (-0.38 arcsec) to Dec
Total aspect correction is 4.27 arcsec
Star catalogs centered at 71.4730 , 12.0433 with radius 2.52 arc min.
n_usno: 72 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 10 matched entries is 0.344" for 1076121_g889
Mean and std. dev of mag. difference (MAG_DELTA) are 1.236 and 0.511 for 1076121_g889
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1076121_g889.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=71.4700 (04:45:52.80) DEC=12.0400 (+12:02:24.0)
XRT distances are as reported in catalog file.
There are 77963.406 counts in the bkg source region of 6207.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 12.561 counts/pixel (5-sig UL in 4" is 19.98 mag) for 1076121_g889
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.97, 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: 1076121_654742689_211001d01h23m23s815048usUT_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(71.4765,12.0416,45")
fk5;-circle(71.463474083359,12.0435852803403,6")
fk5;-circle(71.4786604444843,12.0537384745237,6")
image paragraph message for exposure 3 of trigger 1076121
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB211001 (Swift/BAT trigger 1076121) at 00:43:19 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 862 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.
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 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.411.
------- notes for trigger 1076121 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 211001d01h23m27s168893usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1076121
-expid=654742689 -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/1076121/
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 654742689.65406 or about 2021:274:00:58:04 UT
Found 601 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 108 sources in
srclist catalog. Found 8 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
Found 9 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 19.97 mag. Found 68 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region.
Genie image analysis:
Found 77963.4 counts in the large background region of 6207.0 pixels or a rate
of 12.561 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.
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?
654742689 861 WHITE srclist found no candidates.
654742689 861 WHITE image found no candidates.
List afterglow candidates for other finding charts.
654741900 72 WHITE 71.44878 12.07608 19.31/18.7 149.8 srclist Yes
654741900 72 WHITE image found no candidates.
654742111 283 U srclist found no candidates.
654742111 283 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 12.04000
GRB_ERROR: 200
GRB_RA: 71.47000
IMAGE_START_TIME: 00:58:04
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT