image overlap message for exposure 1 of trigger 1142997
uvot_overlap.pl vrs. 2010-12-20b fem started at 221202d22h48m42s818143usUT
The observation of trigger 1142997 started 2022-12-02T20:08:21.9
Examining file ./1142997_g130_uvot_sky_image.fits
The exposure ID is 691704501
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (77.1004,-59.8130) 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 0.451 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 1.280 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 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1142997
find_uvot_ag.pl vrs. 2020-10-30 fem started at 221202d22h48m45s749718usUT
Observation start time is 2022-12-02T20:08:21.9
Examining file ./1142997_g130_uvot_catalog_image.fits
The exposure ID is 691704501
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 1142997_g130
Aspect correction adds 0.00222 degrees (0.532 sec of time = 4.01 arc sec) to RA
Aspect correction adds -0.00105 degrees (-3.80 arcsec) to Dec
Total aspect correction is 5.52 arcsec
Star catalogs centered at 77.0915 , -59.8092 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 6 matched entries is 0.320" for 1142997_g130
Mean and std. dev of mag. difference (MAG_DELTA) are 1.223 and 0.425 for 1142997_g130
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1142997_g130.
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 32237.340 counts in the bkg source region of 6145.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.246 counts/pixel (5-sig UL in 4" is 20.45 mag) for 1142997_g130
There are 771.82727 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 3.840 counts/pixel for 1142997_g130
XRT source is too far (76.8436219443759") from center -- do not compute local background.
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 21.00, 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_691704501_221202d22h48m45s749718usUT_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(77.1004,-59.8130,45")
fk5;-circle(77.0837837009738,-59.8052590172498,6")
fk5;-circle(77.1172149014124,-59.8216825097896,6")
Region file: 1142997_691704501_221202d22h48m45s749718usUT_xrt.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(77.08300,-59.83247,8")
image paragraph message for exposure 1 of trigger 1142997
------ 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 150 seconds with the White filter
starting 101 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 100% 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 221202d22h48m51s397467usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1142997
-expid=691704501 -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 691704501.9358 or about 2022:336:20:08:16 UT
Found 314 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 61 sources in
srclist catalog. Found 1 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 6 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 21.00 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 32237.3 counts in the large background region of 6145.0 pixels or a rate
of 5.246 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 20.28 mag. for a
4-arcsec aperture.
Found 771.8 counts in the XRT position region of 201.0 pixels or a rate of
3.840 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is -1.884 +/- 0.189 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.568 cps or 20.22 mag. The closest srclist
source has ra= 77.0880 dec= -59.8280 mag=19.75 sep=18.34". The closest Genie
source has ra= 77.0875 dec= -59.8280 mag=19.38 sep=17.93".
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?
691704501 100 WHITE srclist found no candidates.
691704501 100 WHITE image found no candidates.
List afterglow candidates for other finding charts.
691704660 259 U srclist found no candidates.
691704660 259 U image found no candidates.
691705262 861 WHITE srclist found no candidates.
691705262 861 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -59.83247
GRB_ERROR: 5.5
GRB_RA: 77.08300
IMAGE_START_TIME: 20:08:16
MAGNITUDE: 20.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT