srclist overlap message for exposure 3 of trigger 948361
uvot_overlap.pl vrs. 2010-12-20b fem started at 200109d10h12m28s596526usUT
The observation of trigger 948361 started 2020-01-09T02:01:13.8
Examining file ./948361_g896_uvot_sky_srclist.fits
The exposure ID is 600228073
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (307.1249,52.9902) with a roll angle of 196.5
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 (307.1710,53.0030) with a radius of 3.000 arc min
This is 1.832 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 (307.1246,52.9936) with a radius of 0.028 arc min
This is 0.207 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 948361
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200109d10h12m50s558185usUT
Observation start time is 2020-01-09T02:01:13.8
Examining file ./948361_g896_uvot_catalog_srclist.fits
The exposure ID is 600228073
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 948361_g896
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.471
srclist_overlap returned: xrt_overlap 0.000
Dimmest detected source in 948361_g896 has mag 18.58
Aspect correction adds -0.00161 degrees (-0.387 sec of time = -3.49 arc sec) to RA
Aspect correction adds -0.00073 degrees (-2.61 arcsec) to Dec
Total aspect correction is 4.36 arcsec
Star catalogs centered at 307.1621 , 52.9676 with radius 7.67 arc min.
n_usno: 3346 n_gsc: 0
*** WARNING -- bright star catalog has 15 entries brighter than 12 mag
The brightest has mag 8.62328
RA DEC Mag Color
bright star 0: 307.12100 (20:28:29.04) 52.95205 (+52:57:07.4) 11.43 USNO-R
bright star 1: 307.25417 (20:29:01.00) 52.95181 (+52:57:06.5) 11.70 USNO-V
bright star 2: 307.14433 (20:28:34.64) 52.90666 (+52:54:24.0) 10.29 USNO-V
bright star 3: 307.25153 (20:29:00.37) 52.92220 (+52:55:19.9) 11.62 USNO-V
bright star 4: 307.19472 (20:28:46.73) 53.04364 (+53:02:37.1) 11.04 USNO-V
bright star 5: 307.03661 (20:28:08.79) 52.94331 (+52:56:35.9) 11.28 USNO-V
bright star 6: 307.26751 (20:29:04.20) 53.03511 (+53:02:06.4) 8.62 USNO-V
bright star 7: 306.99495 (20:27:58.79) 52.96275 (+52:57:45.9) 10.05 USNO-V
bright star 8: 307.00273 (20:28:00.66) 53.01350 (+53:00:48.6) 11.89 USNO-V
bright star 9: 307.33941 (20:29:21.46) 52.97041 (+52:58:13.5) 11.29 USNO-V
bright star 10: 307.18830 (20:28:45.19) 53.07656 (+53:04:35.6) 11.34 USNO-V
bright star 11: 307.06054 (20:28:14.53) 52.87578 (+52:52:32.8) 11.55 USNO-V
bright star 12: 306.97199 (20:27:53.28) 52.97954 (+52:58:46.4) 11.80 USNO-V
bright star 13: 307.36266 (20:29:27.04) 53.00522 (+53:00:18.8) 11.86 USNO-R
bright star 14: 307.36403 (20:29:27.37) 53.00481 (+53:00:17.3) 11.84 USNO-V
Mean distance difference (CAT_DELTA) for 178 matched entries is 0.783" for 948361_g896
Mean and std. dev of mag. difference (MAG_DELTA) are 1.448 and 0.650 for 948361_g896
Found 22 entries without IDs and 1 entries that are acceptable afterglow candidates for 948361_g896.
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.
17 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=307.1710 (20:28:41.04) DEC=53.0030 (+53:00:10.8)
XRT distances are from RA=307.1246 (20:28:29.91) DEC=52.9936 (+52:59:37.1)
-----------------
Entry 45 in the list of sources is a candidate afterglow for 948361_g896 with 3x3 stamp
ra=307.23010 (20:28:55.22) dec=53.01143 (+53:00:41.2) +/- 1.1" mag=15.72+/-0.35
dist=237.3 REFID=16
*** The position of this source is inconsistent with the XRT position.
The position is 131.6 arc sec from the BAT position.
src: 45 distr. of nearby unmatched sources: 0 0 0 0 0
Found 7 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
307.2222 53.0111 17.2 -1 USNO-B1 18.80 17.70 18.19
307.2279 53.0111 4.9 -1 USNO-B1 18.49 99.99 99.99
307.2275 53.0124 6.5 -1 USNO-B1 16.30 99.99 99.99
307.2289 53.0117 2.7 -1 USNO-B1 14.34 12.43 13.28 *
307.2265 53.0159 17.9 -1 USNO-B1 16.07 15.04 15.49
307.2355 53.0119 11.7 -1 USNO-B1 20.75 19.14 19.86
307.2377 53.0107 16.6 -1 USNO-B1 20.21 19.50 19.82
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
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
307.1220 52.9955 8.8 -1 USNO-B1 20.88 20.24 20.52
The closest star is 8.79" 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 948361
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB200109 (Swift/BAT trigger 948361) at 01:46:16 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 873 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. Because of the density of catalogued stars, further
analysis is required to report an upper limit for any afterglow in the
sub-image. The 8'x8' region for the list of sources generated on-board covers
0.00% of the XRT error circle. No correction has been made for the expected
extinction corresponding to E(B-V) of 0.29.
------- notes for trigger 948361 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200109d10h12m56s287639usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=948361
-expid=600228073 -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/948361/
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 600228073.76566 or about 0000:9505:02:01:17 UT
Found 3342 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 39% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 22 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 39 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.00 mag. Found 446 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
41% of the Genie image region.
Genie image analysis:
Found 165197.4 counts in the large background region of 4930.0 pixels or a rate
of 33.509 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 19.44 mag. for a
4-arcsec aperture.
Found 6589.3 counts in the XRT position region of 200.0 pixels or a rate of
32.947 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.539 +/- 0.593 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.779 cps or 19.15 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 18.58
mag. The closest srclist source has ra= 307.1471 dec= 52.9806 mag=17.33
sep=67.71". The closest Genie source has ra= 307.1239 dec= 52.9968 mag=17.34
sep=11.55".
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?
600228073 872 WHITE srclist found no candidates.
600228073 872 WHITE image found no candidates.
List afterglow candidates for other finding charts.
600227310 109 WHITE srclist found no candidates.
600227310 109 WHITE image found no candidates.
600227468 267 U srclist found no candidates.
600227468 267 U image found no candidates.
------- Tokens for Quick GCN -------