image overlap message for exposure 2 of trigger 956824
uvot_overlap.pl vrs. 2010-12-20b fem started at 200216d19h52m23s910632usUT
The observation of trigger 956824 started 2020-02-16T13:38:34.8
Examining file ./956824_g360_uvot_sky_image.fits
The exposure ID is 603553114
The exposure time is 249.901 (seconds)
The filter is U.
The uvot region is centered at (160.4378,19.4803) with a roll angle of 57.7
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 (160.4610,19.4540) with a radius of 3.000 arc min
This is 2.051 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 6.13 sq. arc min or 0.22 of the BAT error circle
The XRT error circle is centered at (160.4347,19.4752) with a radius of 0.028 arc min
This is 0.352 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 956824
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200216d19h52m32s274068usUT
Observation start time is 2020-02-16T13:38:34.8
Examining file ./956824_g360_uvot_catalog_image.fits
The exposure ID is 603553114
The exposure is 249.901 sec.
The bin size is 2 pixels
The filter is U
There are 6 detected source(s) for 956824_g360
Aspect correction adds -0.00072 degrees (-0.172 sec of time = -2.44 arc sec) to RA
Aspect correction adds 0.00072 degrees ( 2.59 arcsec) to Dec
Total aspect correction is 3.56 arcsec
Star catalogs centered at 160.4399 , 19.4804 with radius 2.43 arc min.
n_usno: 48 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.845" for 956824_g360
Mean and std. dev of mag. difference (MAG_DELTA) are 0.947 and 0.826 for 956824_g360
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 956824_g360.
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=160.4610 (10:41:50.64) DEC=19.4540 (+19:27:14.4)
XRT distances are from RA=160.4347 (10:41:44.32) DEC=19.4752 (+19:28:30.6)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 17853.564 counts in the bkg source region of 6299.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.834 counts/pixel (5-sig UL in 4" is 19.90 mag) for 956824_g360
There are 530.70563 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 2.667 counts/pixel for 956824_g360
There are 3524.3630 counts in the xrt_bkg source region of 1248.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 2.824 counts/pixel (5-sig UL in 4" is 19.90 mag) for 956824_g360
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 20.45, 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: 956824_603553114_200216d19h52m32s274068usUT_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(160.4378,19.4803,45")
fk5;-circle(160.445490901649,19.4691509352855,6")
Region file: 956824_603553114_200216d19h52m32s274068usUT_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(160.43467,19.47517,8")
Region file: 956824_603553114_200216d19h52m32s274068usUT_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(160.43467,19.47517,25")
fk5;-circle(160.43467,19.47517,15")
image paragraph message for exposure 2 of trigger 956824
------ Start for Possible Stand-alone Circular ----
In response to GRB200216 (Swift/BAT trigger 956824) at 13:32:33 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
336 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 19.2 mag.
Results from the list of sources generated on-board are not available at this
time. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.02.
------- notes for trigger 956824 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200216d19h52m34s888915usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=956824
-expid=603553114 -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/956824/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 603553114.80852 or about 2020:047:13:38:29 UT
No information found about the number of stars in the star catalog for srclist
region.
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 20.45 mag. Found 44 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 17853.6 counts in the large background region of 6299.0 pixels or a rate
of 2.834 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 19.94 mag. for a
4-arcsec aperture.
Found 530.7 counts in the XRT position region of 199.0 pixels or a rate of
2.667 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.125 +/- 0.100 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.299 cps or 19.69 mag. The closest Genie
source has ra= 160.4455 dec= 19.4691 mag=18.78 sep=42.64".
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?
603553114 335 U srclist data are not available.
603553114 335 U image found no candidates.
List afterglow candidates for other finding charts.
603552902 123 WHITE srclist found no candidates.
603552902 123 WHITE image found no candidates.
603553643 864 WHITE srclist found no candidates.
603553643 864 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 19.47517
GRB_ERROR: 5
GRB_RA: 160.43467
IMAGE_START_TIME: 13:38:29
MAGNITUDE: 19.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT