image overlap message for exposure 3 of trigger 946476
uvot_overlap.pl vrs. 2010-12-20b fem started at 191228d17h22m22s709141usUT
The observation of trigger 946476 started 2019-12-28T00:16:10.1
Examining file ./946476_g890_uvot_sky_image.fits
The exposure ID is 599184970
The exposure time is 143.178 (seconds)
The filter is WHITE.
The uvot region is centered at (5.3417,-8.6883) with a roll angle of 247.1
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 (5.3390,-8.6700) with a radius of 3.000 arc min
This is 1.108 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 (5.3469,-8.6828) with a radius of 0.023 arc min
This is 0.453 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 946476
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191228d17h22m46s192655usUT
Observation start time is 2019-12-28T00:16:10.1
Examining file ./946476_g890_uvot_catalog_image.fits
The exposure ID is 599184970
The exposure is 143.178 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 946476_g890
Aspect correction adds -0.00146 degrees (-0.351 sec of time = -5.21 arc sec) to RA
Aspect correction adds 0.00035 degrees ( 1.27 arcsec) to Dec
Total aspect correction is 5.36 arcsec
Star catalogs centered at 5.3435 , -8.6928 with radius 2.57 arc min.
n_usno: 47 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 9.4287
RA DEC Mag Color
bright star 0: 5.33391 (00:21:20.14) -8.73339 (-08:44:00.2) 9.43 USNO-V
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.314" for 946476_g890
Mean and std. dev of mag. difference (MAG_DELTA) are 0.960 and 0.287 for 946476_g890
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 946476_g890.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA= 5.3390 (00:21:21.36) DEC=-8.6700 (-08:40:12.0)
XRT distances are from RA= 5.3469 (00:21:23.25) DEC=-8.6828 (-08:40:57.9)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 86817.914 counts in the bkg source region of 6310.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 13.759 counts/pixel (5-sig UL in 4" is 19.88 mag) for 946476_g890
There are 2815.9014 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 14.080 counts/pixel for 946476_g890
There are 16962.314 counts in the xrt_bkg source region of 1241.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 13.668 counts/pixel (5-sig UL in 4" is 19.88 mag) for 946476_g890
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 20.43, 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: 946476_599184970_191228d17h22m46s192655usUT_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(5.3417,-8.6883,45")
Region file: 946476_599184970_191228d17h22m46s192655usUT_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(5.34687,-8.68275,8")
Region file: 946476_599184970_191228d17h22m46s192655usUT_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(5.34687,-8.68275,25")
fk5;-circle(5.34687,-8.68275,15")
image paragraph message for exposure 3 of trigger 946476
------ Start for Possible Stand-alone Circular ----
In response to GRB191228 (Swift/BAT trigger 946476) at 00:01:19 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 143 seconds with the White filter
starting 866 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
0.04.
------- notes for trigger 946476 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191228d17h22m52s354500usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=946476
-expid=599184970 -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/946476/
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 599184970.0922 or about 2019:362:00:16:05 UT
Found 367 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 178 sources in
srclist catalog. Found 137 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.19 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 20.43 mag. Found 43 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 4% of the
Genie image region.
Genie image analysis:
Found 86817.9 counts in the large background region of 6310.0 pixels or a rate
of 13.759 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 19.88 mag. for a
4-arcsec aperture.
Found 2815.9 counts in the XRT position region of 200.0 pixels or a rate of
14.080 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.575 +/- 0.399 (1-sigma) cps or
20.38 mag and a range from 19.81 to 21.67 mag. The 3-sigma UL at the XRT
position is 1.772 cps or 19.16 mag. The closest srclist source has ra= 5.3599
dec= -8.6656 mag=17.84 sep=77.23". The closest Genie source has ra= 5.3602
dec= -8.6943 mag=20.13 sep=63.08".
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?
599184970 866 WHITE srclist found no candidates.
599184970 866 WHITE image found no candidates.
List afterglow candidates for other finding charts.
599184235 131 WHITE srclist found no candidates.
599184235 131 WHITE image found no candidates.
599184393 289 ? srclist data are not available.
599184393 289 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -8.68275
GRB_ERROR: 5
GRB_RA: 5.34687
IMAGE_START_TIME: 00:16:05
MAGNITUDE: 19.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT