image overlap message for exposure 1 of trigger 1076121
uvot_overlap.pl vrs. 2010-12-20b fem started at 211001d00h50m08s097552usUT
The observation of trigger 1076121 started 2021-10-01T00:45:00.0
Examining file 1076121_g100_uvot_sky_image.fits
The exposure ID is 654741900
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (71.4756,12.0392) 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 0.333 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 1076121
find_uvot_ag.pl vrs. 2020-10-30 fem started at 211001d00h50m09s470463usUT
Observation start time is 2021-10-01T00:45:00.0
Examining file 1076121_g100_uvot_catalog_image.fits
The exposure ID is 654741900
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 9 detected source(s) for 1076121_g100
Aspect correction adds 0.00114 degrees (0.274 sec of time = 4.01 arc sec) to RA
Aspect correction adds 0.00044 degrees ( 1.57 arcsec) to Dec
Total aspect correction is 4.31 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 0.531" for 1076121_g100
Mean and std. dev of mag. difference (MAG_DELTA) are 1.443 and 0.738 for 1076121_g100
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1076121_g100.
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 74635.922 counts in the bkg source region of 6258.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 11.926 counts/pixel (5-sig UL in 4" is 20.00 mag) for 1076121_g100
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.00, 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_654741900_211001d00h50m09s470463usUT_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(71.4756,12.0392,45")
fk5;-circle(71.4635181076362,12.0435580216834,6")
image paragraph message for exposure 1 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 72 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 211001d00h50m11s105127usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1076121
-expid=654741900 -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 654741900.03902 or about 2021:274:00:44:55 UT
Found 285 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 43 sources in
srclist catalog. Found 4 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 20.00 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 74635.9 counts in the large background region of 6258.0 pixels or a rate
of 11.926 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 19.83 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?
654741900 72 WHITE 71.44878 12.07608 19.31/18.7 149.8 srclist Yes
654741900 72 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 12.04000
GRB_ERROR: 200
GRB_RA: 71.47000
IMAGE_START_TIME: 00:44:55
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT