srclist overlap message for exposure 2 of trigger 969823
uvot_overlap.pl vrs. 2010-12-20b fem started at 200506d17h54m54s030675usUT
The observation of trigger 969823 started 2020-05-06T17:41:52.4
Examining file ./969823_g302_uvot_sky_srclist.fits
The exposure ID is 610479712
The exposure time is undefined.
The filter is U.
The uvot region is centered at (274.5038,-16.1515) with a roll angle of 81.7
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 (274.4980,-16.1520) with a radius of 3.000 arc min
This is 0.337 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 (274.5007,-16.1312) with a radius of 0.060 arc min
This is 1.234 arc min from the center of the uvot region
The area of the XRT error circle is 0.011 sq. arc min
The UVOT/XRT overlap is 0.011 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 969823
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200506d17h55m04s475819usUT
Observation start time is 2020-05-06T17:41:52.4
Examining file ./969823_g302_uvot_catalog_srclist.fits
The exposure ID is 610479712
The exposure is 249.930 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 969823_g302
*** 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 969823_g302 has mag 17.83
Aspect correction adds 0.00210 degrees (0.505 sec of time = 7.27 arc sec) to RA
Aspect correction adds -0.00076 degrees (-2.72 arcsec) to Dec
Total aspect correction is 7.76 arcsec
Star catalogs centered at 274.5020 , -16.1464 with radius 9.23 arc min.
n_usno: 4000 n_gsc: 0
*** WARNING -- bright star catalog has 13 entries brighter than 12 mag
The brightest has mag 9.70432
RA DEC Mag Color
bright star 0: 274.49509 (18:17:58.82) -16.11858 (-16:07:06.9) 10.60 USNO-V
bright star 1: 274.55214 (18:18:12.51) -16.14408 (-16:08:38.7) 11.10 USNO-V
bright star 2: 274.45239 (18:17:48.57) -16.08993 (-16:05:23.8) 10.81 USNO-V
bright star 3: 274.43506 (18:17:44.41) -16.19148 (-16:11:29.3) 9.70 USNO-V
bright star 4: 274.44522 (18:17:46.85) -16.20754 (-16:12:27.2) 11.23 USNO-V
bright star 5: 274.45380 (18:17:48.91) -16.23147 (-16:13:53.3) 11.36 USNO-V
bright star 6: 274.55763 (18:18:13.83) -16.23140 (-16:13:53.1) 11.88 USNO-V
bright star 7: 274.49262 (18:17:58.23) -16.25657 (-16:15:23.6) 11.16 USNO-V
bright star 8: 274.62068 (18:18:28.96) -16.18972 (-16:11:23.0) 11.62 USNO-V
bright star 9: 274.62108 (18:18:29.06) -16.19102 (-16:11:27.7) 10.86 USNO-R
bright star 10: 274.37364 (18:17:29.67) -16.18432 (-16:11:03.5) 10.86 USNO-V
bright star 11: 274.40657 (18:17:37.58) -16.25165 (-16:15:05.9) 11.65 USNO-V
bright star 12: 274.37822 (18:17:30.77) -16.24243 (-16:14:32.8) 11.02 USNO-V
Mean distance difference (CAT_DELTA) for 160 matched entries is 0.893" for 969823_g302
Mean and std. dev of mag. difference (MAG_DELTA) are 1.850 and 0.664 for 969823_g302
Found 33 entries without IDs and 2 entries that are acceptable afterglow candidates for 969823_g302.
Acceptable entries have no ID, XRT distances < 9", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
25 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=274.4980 (18:17:59.52) DEC=-16.1520 (-16:09:07.2)
XRT distances are from RA=274.5007 (18:18:00.18) DEC=-16.1312 (-16:07:52.3)
-----------------
Entry 8 in the list of sources is a candidate afterglow for 969823_g302 with 3x3 stamp
ra=274.48848 (18:17:57.24) dec=-16.17344 (-16:10:24.4) +/- 1.1" mag=16.97+/-0.35
dist=157.9 REFID=94
*** The position of this source is inconsistent with the XRT position.
The position is 83.9 arc sec from the BAT position.
src: 8 distr. of nearby unmatched sources: 1 1 0 0 0
Found 4 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
274.4929 -16.1711 17.5 -1 USNO-B1 20.29 17.43 18.70
274.4927 -16.1743 14.8 -1 USNO-B1 14.52 12.77 13.55 *
274.4876 -16.1740 3.6 -1 USNO-B1 14.44 12.75 13.50 *
274.4856 -16.1730 10.2 -1 USNO-B1 19.58 16.34 17.78
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 9 in the list of sources is a candidate afterglow for 969823_g302 with 1x1 stamp
ra=274.48702 (18:17:56.89) dec=-16.17442 (-16:10:27.9) +/- 1.1" mag=17.40+/-0.35
dist=162.7 REFID=123
*** The position of this source is inconsistent with the XRT position.
The position is 89.2 arc sec from the BAT position.
src: 9 distr. of nearby unmatched sources: 1 1 0 0 0
Found 4 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
274.4927 -16.1743 19.5 -1 USNO-B1 14.52 12.77 13.55 *
274.4876 -16.1740 2.6 -1 USNO-B1 14.44 12.75 13.50 *
274.4856 -16.1730 7.2 -1 USNO-B1 19.58 16.34 17.78
274.4819 -16.1761 18.8 -1 USNO-B1 19.00 15.28 16.93
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 2 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
274.5027 -16.1330 9.4 -1 USNO-B1 19.41 17.21 18.19
274.4995 -16.1332 8.3 -1 USNO-B1 19.68 16.75 18.05
The closest star is 8.28" 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 18.12, XRT distances < 9",
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 2 of trigger 969823
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no image afterglow info
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB200506 (Swift/BAT trigger 969823) at 17:36:49 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
277 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. Data from the 2.7'x2.7' sub-image are not
available at this time. 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 17.7. No correction has been made for
the large, but uncertain, extinction expected.
------- notes for trigger 969823 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200506d17h55m09s876742usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=969823
-expid=610479712 -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/969823/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for srclist. BAT position found.
UVOT exposure began at MET 610479712.41248 or about 2020:127:17:41:47 UT
Found 3996 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 32% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 33 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
The number of srclist sources filled the available telemetry. The weakest
source detected was 17.83 mag. The closest srclist source has ra= 274.5011 dec=
-16.1341 mag=17.40 sep=10.72".
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?
610479712 277 U srclist found no candidates.
610479712 277 ? image data are not available.
List afterglow candidates for other finding charts.
610479500 65 WHITE srclist found no candidates.
610479500 65 WHITE image found no candidates.
------- Tokens for Quick GCN -------