srclist overlap message for exposure 2 of trigger 899979
uvot_overlap.pl vrs. 2010-12-20b fem started at 190423d02h44m36s199638usUT
The observation of trigger 899979 started 2019-04-22T23:10:17.8
Examining file ./899979_g887_uvot_sky_srclist.fits
The exposure ID is 577667417
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (182.1164,-60.2443) with a roll angle of 215.8
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 (182.1240,-60.2380) with a radius of 3.000 arc min
This is 0.438 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 (182.0345,-60.2242) with a radius of 0.030 arc min
This is 2.720 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 2 of trigger 899979
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190423d02h44m48s886030usUT
Observation start time is 2019-04-22T23:10:17.8
Examining file ./899979_g887_uvot_catalog_srclist.fits
The exposure ID is 577667417
The exposure is 149.879 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 899979_g887
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.249
srclist_overlap returned: xrt_overlap 0.000
Dimmest detected source in 899979_g887 has mag 18.74
Aspect correction adds -0.00134 degrees (-0.321 sec of time = -2.39 arc sec) to RA
Aspect correction adds -0.00147 degrees (-5.29 arcsec) to Dec
Total aspect correction is 5.81 arcsec
Star catalogs centered at 182.1594 , -60.2760 with radius 8.04 arc min.
n_usno: 3585 n_gsc: 0
*** WARNING -- bright star catalog has 9 entries brighter than 12 mag
The brightest has mag 10.51094
RA DEC Mag Color
bright star 0: 182.21101 (12:08:50.64) -60.31044 (-60:18:37.6) 11.92 USNO-V
bright star 1: 182.15575 (12:08:37.38) -60.20486 (-60:12:17.5) 11.91 USNO-V
bright star 2: 182.02295 (12:08:05.51) -60.31207 (-60:18:43.4) 11.92 USNO-V
bright star 3: 182.32174 (12:09:17.22) -60.30232 (-60:18:08.3) 11.37 USNO-V
bright star 4: 182.15074 (12:08:36.18) -60.18565 (-60:11:08.4) 11.96 USNO-V
bright star 5: 182.18397 (12:08:44.15) -60.36662 (-60:21:59.8) 10.51 USNO-V
bright star 6: 182.03610 (12:08:08.66) -60.35742 (-60:21:26.7) 11.56 USNO-V
bright star 7: 182.12260 (12:08:29.42) -60.38287 (-60:22:58.3) 11.52 USNO-V
bright star 8: 182.26261 (12:09:03.03) -60.17588 (-60:10:33.2) 11.44 USNO-V
Mean distance difference (CAT_DELTA) for 190 matched entries is 0.886" for 899979_g887
Mean and std. dev of mag. difference (MAG_DELTA) are 1.801 and 0.712 for 899979_g887
Found 11 entries without IDs and 1 entries that are acceptable afterglow candidates for 899979_g887.
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.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=182.1240 (12:08:29.76) DEC=-60.2380 (-60:14:16.8)
XRT distances are from RA=182.0345 (12:08:08.28) DEC=-60.2242 (-60:13:27.3)
-----------------
Entry 15 in the list of sources is a candidate afterglow for 899979_g887 with 1x1 stamp
ra=182.20764 (12:08:49.83) dec=-60.26646 (-60:15:59.3) +/- 1.1" mag=18.15+/-0.35
dist=344.5 REFID=183
*** The position of this source is inconsistent with the XRT position.
The position is 181.2 arc sec from the BAT position.
src: 15 srclist_match has ID
src: 15 distr. of nearby unmatched sources: 0 0 0 0 0
Found 6 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
182.2012 -60.2709 19.6 -1 USNO-B1 17.61 17.88 17.76
182.2032 -60.2651 9.3 -1 USNO-B1 12.72 12.91 12.83 *
182.2073 -60.2662 1.2 -1 USNO-B1 16.13 15.06 15.54 *
182.2046 -60.2630 13.6 -1 USNO-B1 16.96 16.59 16.76
182.2142 -60.2664 11.7 -1 USNO-B1 17.96 99.99 99.99
182.2150 -60.2628 18.5 -1 USNO-B1 15.34 13.98 14.59
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
182.0344 -60.2257 5.3 -1 USNO-B1 15.62 14.81 15.17
The closest star is 5.30" 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 2 of trigger 899979
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
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 GRB190422 (Swift/BAT trigger 899979) at 22:55:29 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 865 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 none of
the XRT error circle. 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 large, but uncertain, extinction expected.
------- notes for trigger 899979 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190423d02h44m55s657737usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=899979
-expid=577667417 -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/899979/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Large extinction of 5.23 found for bat position. Unreliable extinction found
for xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 577667417.78562 or about 2019:112:23:10:12 UT
Found 3581 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 38% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 11 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 72 source(s) in Genie image catalog. Found 5 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.48 mag. Found 413 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
39% of the Genie image region.
Genie image analysis:
Found 55452.7 counts in the large background region of 4028.0 pixels or a rate
of 13.767 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 19.93 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 18.74 mag. The closest srclist
source has ra= 182.0441 dec= -60.2877 mag=18.44 sep=228.99". The closest Genie
source has ra= 182.0669 dec= -60.2331 mag=20.05 sep=66.10".
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?
577667417 865 WHITE srclist found no candidates.
577667417 865 WHITE image found no candidates.
List afterglow candidates for other finding charts.
577667083 531 WHITE srclist found no candidates.
577667083 531 WHITE image found no candidates.
------- Tokens for Quick GCN -------