image overlap message for exposure 3 of trigger 1142997
uvot_overlap.pl vrs. 2010-12-20b fem started at 221202d22h48m44s076708usUT
The observation of trigger 1142997 started 2022-12-02T20:21:02.9
Examining file ./1142997_g891_uvot_sky_image.fits
The exposure ID is 691705262
The exposure time is 131.531 (seconds)
The filter is WHITE.
The uvot region is centered at (77.0987,-59.8116) with a roll angle of 172.4
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 (77.0950,-59.8060) with a radius of 3.000 arc min
This is 0.357 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
The XRT error circle is centered at (77.0830,-59.8325) with a radius of 0.037 arc min
This is 1.337 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 0.54 of the XRT error circle
image afterglow message for exposure 3 of trigger 1142997
find_uvot_ag.pl vrs. 2020-10-30 fem started at 221202d22h49m05s768948usUT
Observation start time is 2022-12-02T20:21:02.9
Examining file ./1142997_g891_uvot_catalog_image.fits
The exposure ID is 691705262
The exposure is 131.531 sec.
The bin size is 2 pixels
The filter is WHITE
There are 5 detected source(s) for 1142997_g891
Aspect correction adds 0.00085 degrees (0.205 sec of time = 1.54 arc sec) to RA
Aspect correction adds -0.00098 degrees (-3.52 arcsec) to Dec
Total aspect correction is 3.84 arcsec
Star catalogs centered at 77.0915 , -59.8091 with radius 2.35 arc min.
n_usno: 51 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 5 matched entries is 0.348" for 1142997_g891
Mean and std. dev of mag. difference (MAG_DELTA) are 1.155 and 0.336 for 1142997_g891
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1142997_g891.
Acceptable entries have no ID, XRT distances < 5.5", 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=77.0950 (05:08:22.80) DEC=-59.8060 (-59:48:21.6)
XRT distances are from RA=77.0830 (05:08:19.92) DEC=-59.8325 (-59:49:56.9)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 95663.055 counts in the bkg source region of 6194.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 15.444 counts/pixel (5-sig UL in 4" is 19.72 mag) for 1142997_g891
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 20.28, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1142997_691705262_221202d22h49m05s768948usUT_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(77.0987,-59.8116,45")
fk5;-circle(77.0837961920252,-59.8052425548603,6")
fk5;-circle(77.1171020122227,-59.8216328801246,6")
image paragraph message for exposure 3 of trigger 1142997
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB221202 (Swift/BAT trigger 1142997) at 20:06:10 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 132 seconds with the White filter
starting 861 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 54% of
the XRT 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
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
0.027.
------- notes for trigger 1142997 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 221202d22h49m10s979424usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1142997
-expid=691705262 -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/1142997/
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 691705262.86528 or about 2022:336:20:20:57 UT
Found 686 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 113 sources in
srclist catalog. Found 22 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.15 mag.
Found 5 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 20.28 mag. Found 47 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.
Genie image analysis:
Found 95663.1 counts in the large background region of 6194.0 pixels or a rate
of 15.444 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 19.55 mag. for a
4-arcsec aperture. The closest srclist source has ra= 77.0785 dec= -59.8223
mag=18.96 sep=37.38". The closest Genie source has ra= 77.0876 dec= -59.8279
mag=19.50 sep=18.40".
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?
691705262 861 WHITE srclist found no candidates.
691705262 861 WHITE image found no candidates.
List afterglow candidates for other finding charts.
691704501 100 WHITE srclist found no candidates.
691704501 100 WHITE image found no candidates.
691704660 259 U srclist found no candidates.
691704660 259 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -59.83247
GRB_ERROR: 5.5
GRB_RA: 77.08300
IMAGE_START_TIME: 20:20:57
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT