image overlap message for exposure 3 of trigger 938899
uvot_overlap.pl vrs. 2010-12-20b fem started at 191122d21h06m11s721448usUT
The observation of trigger 938899 started 2019-11-22T13:47:53.4
Examining file ./938899_g896_uvot_sky_image.fits
The exposure ID is 596123273
The exposure time is 86.620 (seconds)
The filter is WHITE.
The uvot region is centered at (54.2720,-32.1912) with a roll angle of 184.1
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 (54.2960,-32.1760) with a radius of 3.000 arc min
This is 1.523 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 7.04 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (54.2699,-32.1866) with a radius of 0.027 arc min
This is 0.292 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 938899
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191122d21h06m27s736338usUT
Observation start time is 2019-11-22T13:47:53.4
Examining file ./938899_g896_uvot_catalog_image.fits
The exposure ID is 596123273
The exposure is 86.620 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 938899_g896
Aspect correction adds 0.00095 degrees (0.229 sec of time = 2.90 arc sec) to RA
Aspect correction adds -0.00105 degrees (-3.79 arcsec) to Dec
Total aspect correction is 4.77 arcsec
Star catalogs centered at 54.2842 , -32.1932 with radius 2.00 arc min.
n_usno: 44 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 1.139" for 938899_g896
Mean and std. dev of mag. difference (MAG_DELTA) are 1.555 and 0.464 for 938899_g896
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 938899_g896.
Acceptable entries have no ID, XRT distances < 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=54.2960 (03:37:11.04) DEC=-32.1760 (-32:10:33.6)
XRT distances are from RA=54.2699 (03:37:04.77) DEC=-32.1866 (-32:11:11.9)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 21929.408 counts in the bkg source region of 6309.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 3.476 counts/pixel (5-sig UL in 4" is 20.08 mag) for 938899_g896
There are 662.56879 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 3.296 counts/pixel for 938899_g896
There are 4273.8501 counts in the xrt_bkg source region of 1249.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 3.422 counts/pixel (5-sig UL in 4" is 20.09 mag) for 938899_g896
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 20.63, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 938899_596123273_191122d21h06m27s736338usUT_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(54.2720,-32.1912,45")
Region file: 938899_596123273_191122d21h06m27s736338usUT_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(54.26987,-32.18664,8")
Region file: 938899_596123273_191122d21h06m27s736338usUT_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(54.26987,-32.18664,25")
fk5;-circle(54.26987,-32.18664,15")
image paragraph message for exposure 3 of trigger 938899
------ Start for Possible Stand-alone Circular ----
In response to GRB191122 (Swift/BAT trigger 938899) at 13:32:56 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 87 seconds with the White filter
starting 873 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
0.01.
------- notes for trigger 938899 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191122d21h06m31s160512usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=938899
-expid=596123273 -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/938899/
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 596123273.41424 or about 2019:326:13:47:48 UT
Found 915 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 70 sources in
srclist catalog. Found 31 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.92 mag.
Found 1 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 20.63 mag. Found 40 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region.
Genie image analysis:
Found 21929.4 counts in the large background region of 6309.0 pixels or a rate
of 3.476 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 20.08 mag. for a
4-arcsec aperture.
Found 662.6 counts in the XRT position region of 201.0 pixels or a rate of
3.297 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.290 +/- 0.320 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.959 cps or 19.83 mag. The closest srclist
source has ra= 54.2357 dec= -32.1858 mag=16.80 sep=104.07". The closest Genie
source has ra= 54.2881 dec= -32.1963 mag=20.53 sep=65.49".
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?
596123273 872 WHITE srclist found no candidates.
596123273 872 WHITE image found no candidates.
List afterglow candidates for other finding charts.
596122503 102 WHITE srclist found no candidates.
596122503 102 WHITE image found no candidates.
596122716 315 U srclist found no candidates.
596122716 315 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -32.18664
GRB_ERROR: 5
GRB_RA: 54.26987
IMAGE_START_TIME: 13:47:48
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT