image overlap message for exposure 1 of trigger 1142847
uvot_overlap.pl vrs. 2010-12-20b fem started at 221201d20h11m24s836432usUT
The observation of trigger 1142847 started 2022-12-01T12:28:35.1
Examining file ./1142847_g209_uvot_sky_image.fits
The exposure ID is 691590515
The exposure time is 149.857 (seconds)
The filter is WHITE.
*** Warning -- found 19141 null pixels in the image.
The uvot region is centered at (266.9190,-68.2447) with a roll angle of 335.6
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 (266.9330,-68.2600) with a radius of 3.000 arc min
This is 0.970 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 at most 2.88 sq. arc min or 0.10 of the BAT error circle
The XRT error circle is centered at (266.9246,-68.2488) with a radius of 0.035 arc min
This is 0.278 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 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1142847
find_uvot_ag.pl vrs. 2020-10-30 fem started at 221201d20h11m27s844749usUT
Observation start time is 2022-12-01T12:28:35.1
Examining file ./1142847_g209_uvot_catalog_image.fits
The exposure ID is 691590515
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 1142847_g209
Aspect correction adds 0.00021 degrees (0.051 sec of time = 0.28 arc sec) to RA
Aspect correction adds 0.00076 degrees ( 2.73 arcsec) to Dec
Total aspect correction is 2.75 arcsec
Star catalogs centered at 266.9258 , -68.2466 with radius 2.71 arc min.
n_usno: 272 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.650" for 1142847_g209
Mean and std. dev of mag. difference (MAG_DELTA) are 1.540 and 0.565 for 1142847_g209
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1142847_g209.
Acceptable entries have no ID, XRT distances < 5.25", 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=266.9330 (17:47:43.92) DEC=-68.2600 (-68:15:36.0)
XRT distances are from RA=266.9246 (17:47:41.91) DEC=-68.2488 (-68:14:55.8)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 3303.8789 counts in the bkg source region of 150.00000 pixels.
Rate in bkg region from 0 to 45 arcsec is 22.026 counts/pixel (5-sig UL in 4" is 19.67 mag) for 1142847_g209
There are 0.0000000 counts in the xrt source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt_bkg source region of 0.0000000 pixels.
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 20.23, XRT distances < 5.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1142847_691590515_221201d20h11m27s844749usUT_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(266.9190,-68.2447,45")
Region file: 1142847_691590515_221201d20h11m27s844749usUT_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(266.92462,-68.24883,8")
Region file: 1142847_691590515_221201d20h11m27s844749usUT_xrt_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(266.92462,-68.24883,25")
fk5;-circle(266.92462,-68.24883,15")
image paragraph message for exposure 1 of trigger 1142847
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB221201 (Swift/BAT trigger 1142847) at 12:25:05 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 179 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 XRT error circle. 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 0.066.
------- notes for trigger 1142847 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 221201d20h11m33s444993usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1142847
-expid=691590515 -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/1142847/
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 691590515.06736 or about 2022:335:12:28:30 UT
Found 1378 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 26% of the srclist region. Found 172 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
19.22 mag.
Found 3 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 20.23 mag. Found 268 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 25% of the
Genie image region. The Genie image is INCOMPLETE with 19141 null pixels.
Genie image analysis:
Found 3303.9 counts in the large background region of 150.0 pixels or a rate of
22.026 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 19.50 mag. for a
4-arcsec aperture. The closest srclist source has ra= 266.9173 dec= -68.2470
mag=18.69 sep=11.74". The closest Genie source has ra= 266.8859 dec= -68.2632
mag=19.99 sep=73.24".
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?
691590515 179 WHITE srclist found no candidates.
691590515 179 WHITE image found no candidates.
List afterglow candidates for other finding charts.
691590673 337 ? srclist data are not available.
691590673 337 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -68.24883
GRB_ERROR: 5.25
GRB_RA: 266.92462
IMAGE_START_TIME: 12:28:30
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT