srclist overlap message for exposure 1 of trigger 994143
uvot_overlap.pl vrs. 2010-12-20b fem started at 200901d18h11m58s482291usUT
The observation of trigger 994143 started 2020-09-01T04:38:49.8
Examining file ./994143_g3077_uvot_sky_srclist.fits
The exposure ID is 620627929
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (61.7676,-59.8786) with a roll angle of 93.8
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (61.7580,-59.8800) with a radius of 3.000 arc min
This is 0.303 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 (61.7832,-59.8908) with a radius of 0.030 arc min
This is 0.873 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 1 of trigger 994143
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200901d18h12m00s435435usUT
Observation start time is 2020-09-01T04:38:49.8
Examining file ./994143_g3077_uvot_catalog_srclist.fits
The exposure ID is 620627929
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 28 detected source(s) for 994143_g3077
Aspect correction adds 0.00100 degrees (0.240 sec of time = 1.81 arc sec) to RA
Aspect correction adds -0.00035 degrees (-1.27 arcsec) to Dec
Total aspect correction is 2.21 arcsec
Star catalogs centered at 61.7669 , -59.8763 with radius 6.28 arc min.
n_usno: 475 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.35062
RA DEC Mag Color
bright star 0: 61.61579 (04:06:27.79) -59.86684 (-59:52:00.6) 11.35 USNO-V
Mean distance difference (CAT_DELTA) for 24 matched entries is 0.715" for 994143_g3077
Mean and std. dev of mag. difference (MAG_DELTA) are 1.869 and 0.308 for 994143_g3077
Found 4 entries without IDs and 3 entries that are acceptable afterglow candidates for 994143_g3077.
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=61.7580 (04:07:01.92) DEC=-59.8800 (-59:52:48.0)
XRT distances are from RA=61.7832 (04:07:07.97) DEC=-59.8908 (-59:53:27.0)
-----------------
Entry 3 in the list of sources is a candidate afterglow for 994143_g3077 with 5x5 stamp
ra=61.79293 (04:07:10.30) dec=-59.86062 (-59:51:38.2) +/- 1.1" mag=20.16+/-0.35
dist=110.2 REFID=22
*** The position of this source is inconsistent with the XRT position.
The position is 94.1 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 0 0 0 0 0
Found 3 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
61.7943 -59.8635 10.6 -1 USNO-B1 18.50 19.00 18.78
61.7940 -59.8632 9.5 -1 USNO-B1 18.77 18.99 18.89
61.7949 -59.8609 3.7 -1 USNO-B1 14.96 14.40 14.65 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 10 in the list of sources is a candidate afterglow for 994143_g3077 with 5x5 stamp
ra=61.66538 (04:06:39.69) dec=-59.87404 (-59:52:26.5) +/- 1.1" mag=20.38+/-0.35
dist=221.3 REFID=28
*** The position of this source is inconsistent with the XRT position.
The position is 168.7 arc sec from the BAT position.
src: 10 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
61.6634 -59.8774 12.5 -1 USNO-B1 13.11 12.36 12.69 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 16 in the list of sources is a candidate afterglow for 994143_g3077 with 5x5 stamp
ra=61.84228 (04:07:22.15) dec=-59.84639 (-59:50:47.0) +/- 1.1" mag=20.01+/-0.35
dist=192.4 REFID=19
*** The position of this source is inconsistent with the XRT position.
The position is 194.5 arc sec from the BAT position.
src: 16 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
61.8420 -59.8458 2.1 -1 USNO-B1 18.31 17.77 18.01 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
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 1 of trigger 994143
------ Start for Possible Stand-alone Circular ----
In response to GRB200901 (Swift/BAT trigger 994143) at 03:47:31 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 3052 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 0.02.
------- notes for trigger 994143 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200901d18h12m31s241275usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=994143
-expid=620627929 -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/994143/
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 620627929.77738 or about 2020:245:04:38:44 UT
Found 471 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 28 sources in
srclist catalog. Found 4 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 7 source(s) in Genie image catalog. Found 2 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.99 mag. Found 36 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 33024.3 counts in the large background region of 6105.0 pixels or a rate
of 5.409 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 20.43 mag. for a
4-arcsec aperture.
Found 1178.9 counts in the XRT position region of 203.0 pixels or a rate of
5.807 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.406 +/- 0.247 (1-sigma) cps or
20.76 mag and a range from 20.24 to 21.78 mag. The 3-sigma UL at the XRT
position is 1.147 cps or 19.63 mag. The closest srclist source has ra= 61.7818
dec= -59.8985 mag=18.22 sep=27.68". The closest Genie source has ra= 61.7909
dec= -59.8901 mag=21.72 sep=14.21".
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?
620627929 3051 WHITE srclist found no candidates.
620627929 3051 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -59.89083
GRB_ERROR: 5
GRB_RA: 61.78321
IMAGE_START_TIME: 04:38:44
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT