image overlap message for exposure 2 of trigger 998344
uvot_overlap.pl vrs. 2010-12-20b fem started at 201001d13h50m43s951178usUT
The observation of trigger 998344 started 2020-10-01T10:03:55.6
Examining file ./998344_g303_uvot_sky_image.fits
The exposure ID is 623239435
The exposure time is 249.924 (seconds)
The filter is U.
The uvot region is centered at (110.0757,-2.2096) with a roll angle of 93.1
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 (110.0700,-2.2100) with a radius of 3.000 arc min
This is 0.345 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 (110.0809,-2.2110) with a radius of 0.052 arc min
This is 0.320 arc min from the center of the uvot region
The area of the XRT error circle is 0.008 sq. arc min
The UVOT/XRT overlap is 0.008 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 998344
find_uvot_ag.pl vrs. 2017-02-17 fem started at 201001d13h51m02s852615usUT
Observation start time is 2020-10-01T10:03:55.6
Examining file ./998344_g303_uvot_catalog_image.fits
The exposure ID is 623239435
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 28 detected source(s) for 998344_g303
Aspect correction adds 0.00207 degrees (0.498 sec of time = 7.46 arc sec) to RA
Aspect correction adds -0.00020 degrees (-0.72 arcsec) to Dec
Total aspect correction is 7.49 arcsec
Star catalogs centered at 110.0754 , -2.2071 with radius 2.63 arc min.
n_usno: 265 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.71488
RA DEC Mag Color
bright star 0: 110.08591 (07:20:20.62) -2.19694 (-02:11:49.0) 11.71 USNO-V
bright star 1: 110.10379 (07:20:24.91) -2.23285 (-02:13:58.2) 10.71 USNO-V
Mean distance difference (CAT_DELTA) for 30 matched entries is 0.402" for 998344_g303
Mean and std. dev of mag. difference (MAG_DELTA) are 0.662 and 0.745 for 998344_g303
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 998344_g303.
Acceptable entries have no ID, XRT distances < 7.75", 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=110.0700 (07:20:16.80) DEC=-2.2100 (-02:12:36.0)
XRT distances are from RA=110.0809 (07:20:19.41) DEC=-2.2110 (-02:12:39.7)
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
110.0784 -2.2100 9.7 -1 USNO-B1 19.95 18.55 19.17
The closest star is 9.72" away.
List UVOT sources within 10" of the XRT position:
There are 21363.984 counts in the bkg source region of 5245.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 4.073 counts/pixel (5-sig UL in 4" is 19.70 mag) for 998344_g303
There are 747.18427 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 3.736 counts/pixel for 998344_g303
There are 4337.3936 counts in the xrt_bkg source region of 1130.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 3.838 counts/pixel (5-sig UL in 4" is 19.73 mag) for 998344_g303
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 20.26, XRT distances < 7.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 998344_623239435_201001d13h51m02s852615usUT_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(110.0757,-2.2096,45")
fk5;-circle(110.067820701881,-2.20971878735557,6")
fk5;-circle(110.072831383054,-2.2080484600247,6")
fk5;-circle(110.069833146817,-2.21589013694426,6")
fk5;-circle(110.065732354554,-2.21423189672475,6")
fk5;-circle(110.064471934641,-2.20317676322328,6")
fk5;-circle(110.078535321709,-2.21279879582339,6")
fk5;-circle(110.072084412655,-2.20108943020174,6")
fk5;-circle(110.076322078655,-2.20244416042915,6")
fk5;-circle(110.078714745371,-2.21682180482549,6")
fk5;-circle(110.072786809256,-2.22267132409541,6")
fk5;-circle(110.085050541519,-2.21761722724592,6")
fk5;-circle(110.084681061149,-2.20116164964354,6")
Region file: 998344_623239435_201001d13h51m02s852615usUT_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(110.08087,-2.21103,8")
Region file: 998344_623239435_201001d13h51m02s852615usUT_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(110.08087,-2.21103,25")
fk5;-circle(110.08087,-2.21103,15")
fk5;-circle(110.072831383054,-2.2080484600247,6")
fk5;-circle(110.078535321709,-2.21279879582339,6")
fk5;-circle(110.078714745371,-2.21682180482549,6")
fk5;-circle(110.085050541519,-2.21761722724592,6")
image paragraph message for exposure 2 of trigger 998344
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB201001 (Swift/BAT trigger 998344) at 09:58:51 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
278 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. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. The limiting magnitude for the list of sources is expected to be
about 17.6. No correction has been made for the expected extinction
corresponding to E(B-V) of 0.12.
------- notes for trigger 998344 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 201001d13h51m06s732208usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=998344
-expid=623239435 -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/998344/
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 623239435.57512 or about 2020:275:10:03:50 UT
Found 2916 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 27% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 5 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 28 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 20.26 mag. Found 261 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
26% of the Genie image region.
Genie image analysis:
Found 21364.0 counts in the large background region of 5245.0 pixels or a rate
of 4.073 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 19.74 mag. for a
4-arcsec aperture.
Found 747.2 counts in the XRT position region of 200.0 pixels or a rate of
3.736 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.082 +/- 0.119 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.357 cps or 19.50 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 17.70
mag. The closest srclist source has ra= 110.0763 dec= -2.2026 mag=16.97
sep=34.44". The closest Genie source has ra= 110.0785 dec= -2.2128 mag=18.58
sep=10.54".
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?
623239435 277 U srclist found no candidates.
623239435 277 U image found no candidates.
List afterglow candidates for other finding charts.
623239276 118 WHITE srclist found no candidates.
623239276 118 WHITE image found no candidates.
623240014 856 WHITE srclist found no candidates.
623240014 856 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -2.21103
GRB_ERROR: 7.75
GRB_RA: 110.08087
IMAGE_START_TIME: 10:03:50
MAGNITUDE: 19.5
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT