image overlap message for exposure 1 of trigger 1042031
uvot_overlap.pl vrs. 2010-12-20b fem started at 210409d15h04m21s474972usUT
The observation of trigger 1042031 started 2021-04-09T14:57:48.7
Examining file 1042031_g4422_uvot_sky_image.fits
The exposure ID is 639673068
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 4394 null pixels in the image.
The uvot region is centered at (244.9364,-15.4734) with a roll angle of 94.0
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 (0.0000,0.0000) with a radius of 3.000 arc min
This is 6718.042 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 0.00 sq. arc min or 0.00 of the BAT error circle
Could not find the location of an XRT error circle
image afterglow message for exposure 1 of trigger 1042031
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210409d15h04m23s267942usUT
Observation start time is 2021-04-09T14:57:48.7
Examining file 1042031_g4422_uvot_catalog_image.fits
The exposure ID is 639673068
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 10 detected source(s) for 1042031_g4422
Aspect correction adds 0.00005 degrees (0.013 sec of time = 0.18 arc sec) to RA
Aspect correction adds 0.00062 degrees ( 2.25 arcsec) to Dec
Total aspect correction is 2.25 arcsec
Star catalogs centered at 244.9413 , -15.4739 with radius 2.21 arc min.
n_usno: 118 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 0.394" for 1042031_g4422
Mean and std. dev of mag. difference (MAG_DELTA) are 0.924 and 0.340 for 1042031_g4422
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1042031_g4422.
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= 0.0000 (00:00:00.00) DEC= 0.0000 (+00:00:00.0)
XRT distances are as reported in catalog file.
There are 79225.742 counts in the bkg source region of 6042.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 13.113 counts/pixel (5-sig UL in 4" is 19.95 mag) for 1042031_g4422
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.95, 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: 1042031_639673068_210409d15h04m23s267942usUT_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(244.9364,-15.4734,45")
fk5;-circle(244.934378089912,-15.4715501415701,6")
fk5;-circle(244.923132944877,-15.4768693706429,6")
fk5;-circle(244.936428553089,-15.4806963208922,6")
fk5;-circle(244.946912469234,-15.4816260511121,6")
image paragraph message for exposure 1 of trigger 1042031
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB210409 (Swift/BAT trigger 1042031) at 13:44:05 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 4396 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 BAT error circle. The 8'x8' region for the list of sources
generated on-board covers none of the BAT error circle. No correction has been
made for extinction.
------- notes for trigger 1042031 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210409d15h04m25s276763usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1042031
-expid=639673068 -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/1042031/
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 639673068.67098 or about 2021:099:14:57:43 UT
Found 1019 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 17% of the srclist region. Found 74 sources in
srclist catalog. Found 10 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 10 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 19.95 mag. Found 114 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
16% of the Genie image region. The Genie image is INCOMPLETE with 4394 null
pixels.
Genie image analysis:
Found 79225.7 counts in the large background region of 6042.0 pixels or a rate
of 13.112 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 19.77 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?
639673068 4396 WHITE srclist found no candidates.
639673068 4396 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------