srclist overlap message for exposure 3 of trigger 994856
uvot_overlap.pl vrs. 2010-12-20b fem started at 200906d21h24m20s457401usUT
The observation of trigger 994856 started 2020-09-06T13:25:56.2
Examining file ./994856_g891_uvot_sky_srclist.fits
The exposure ID is 621091556
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (272.2605,67.8802) with a roll angle of 287.7
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (272.2930,67.8520) with a radius of 3.000 arc min
This is 1.846 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (272.2753,67.8800) with a radius of 0.032 arc min
This is 0.334 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
srclist afterglow message for exposure 3 of trigger 994856
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200906d21h24m46s745129usUT
Observation start time is 2020-09-06T13:25:56.2
Examining file ./994856_g891_uvot_catalog_srclist.fits
The exposure ID is 621091556
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 994856_g891
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 994856_g891 has mag 19.69
Aspect correction adds -0.00296 degrees (-0.711 sec of time = -4.02 arc sec) to RA
Aspect correction adds 0.00072 degrees ( 2.59 arcsec) to Dec
Total aspect correction is 4.78 arcsec
Star catalogs centered at 272.2591 , 67.8827 with radius 8.92 arc min.
n_usno: 1319 n_gsc: 0
*** WARNING -- bright star catalog has 7 entries brighter than 12 mag
The brightest has mag 7.85
RA DEC Mag Color
bright star 0: 272.50390 (18:10:00.94) 67.89842 (+67:53:54.3) 11.81 USNO-V
bright star 1: 272.23508 (18:08:56.42) 67.98731 (+67:59:14.3) 7.85 USNO-R
bright star 2: 272.23198 (18:08:55.67) 67.98826 (+67:59:17.7) 8.03 USNO-V
bright star 3: 272.23766 (18:08:57.04) 67.98859 (+67:59:18.9) 9.08 USNO-V
bright star 4: 272.19173 (18:08:46.02) 67.77726 (+67:46:38.1) 11.53 USNO-V
bright star 5: 271.99763 (18:07:59.43) 67.94005 (+67:56:24.2) 10.87 USNO-V
bright star 6: 272.50555 (18:10:01.33) 67.78193 (+67:46:55.0) 8.27 USNO-V
Mean distance difference (CAT_DELTA) for 142 matched entries is 0.833" for 994856_g891
Mean and std. dev of mag. difference (MAG_DELTA) are 1.371 and 0.899 for 994856_g891
Found 82 entries without IDs and 0 entries that are acceptable afterglow candidates for 994856_g891.
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.
78 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=272.2930 (18:09:10.32) DEC=67.8520 (+67:51:07.2)
XRT distances are from RA=272.2753 (18:09:06.08) DEC=67.8800 (+67:52:48.1)
*** WARNING 43 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 72:
ra=272.06288 dec= 67.90300 +/- 1.1" mag=19.51+/-0.35 dist=299.4 REFID=186
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
272.2701 67.8790 8.0 -1 USNO-B1 99.99 19.57 99.99
The closest star is 8.01" away.
List UVOT sources within 10" of the XRT position:
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 19.22, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 3 of trigger 994856
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB200906 (Swift/BAT trigger 994856) at 13:11:04 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 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
0.05.
------- notes for trigger 994856 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200906d21h24m51s322061usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=994856
-expid=621091556 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/994856/
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 621091556.17696 or about 2020:250:13:25:51 UT
Found 1315 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 11% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 82 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 15 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 21.02 mag. Found 131 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
14% of the Genie image region.
Genie image analysis:
Found 29944.2 counts in the large background region of 5930.0 pixels or a rate
of 5.050 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 20.47 mag. for a
4-arcsec aperture.
Found 960.4 counts in the XRT position region of 202.0 pixels or a rate of
4.754 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.211 +/- 0.225 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.676 cps or 20.21 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 19.69
mag. The closest srclist source has ra= 272.2922 dec= 67.8812 mag=18.99
sep=23.28". The closest Genie source has ra= 272.2580 dec= 67.8798 mag=19.39
sep=23.51".
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?
621091556 866 WHITE srclist found no candidates.
621091556 866 WHITE image found no candidates.
List afterglow candidates for other finding charts.
621090766 76 WHITE srclist found no candidates.
621090766 76 WHITE image found no candidates.
621090978 288 U srclist found no candidates.
621090978 288 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 67.88003
GRB_ERROR: 5
GRB_RA: 272.27533
IMAGE_START_TIME: 13:25:51
MAGNITUDE: 20.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT