srclist overlap message for exposure 3 of trigger 815603
uvot_overlap.pl vrs. 2010-12-20b fem started at 180319d01h37m34s424045usUT
The observation of trigger 815603 started 2018-03-19T01:26:50.8
Examining file 815603_g878_uvot_sky_srclist.fits
The exposure ID is 543115610
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (275.0960,7.1838) with a roll angle of 91.5
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 (275.0940,7.1690) with a radius of 3.000 arc min
This is 0.893 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 (275.0915,7.1839) with a radius of 0.090 arc min
This is 0.267 arc min from the center of the uvot region
The area of the XRT error circle is 0.025 sq. arc min
The UVOT/XRT overlap is 0.025 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 815603
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180319d01h37m35s111412usUT
Observation start time is 2018-03-19T01:26:50.8
Examining file 815603_g878_uvot_catalog_srclist.fits
The exposure ID is 543115610
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 815603_g878
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.300
srclist_overlap returned: xrt_overlap 0.000
Dimmest detected source in 815603_g878 has mag 18.58
Aspect correction adds 0.00006 degrees (0.015 sec of time = 0.22 arc sec) to RA
Aspect correction adds 0.00006 degrees ( 0.21 arcsec) to Dec
Total aspect correction is 0.31 arcsec
Star catalogs centered at 275.1219 , 7.2103 with radius 7.71 arc min.
n_usno: 3630 n_gsc: 4410
*** WARNING -- bright star catalog has 11 entries brighter than 12 mag
The brightest has mag 10.161
RA DEC Mag Color
bright star 0: 275.13370 (18:20:32.09) 7.23838 (+07:14:18.2) 11.40 USNO-V
bright star 1: 275.09094 (18:20:21.83) 7.21634 (+07:12:58.8) 11.21 USNO-V
bright star 2: 275.21034 (18:20:50.48) 7.20971 (+07:12:35.0) 11.73 USNO-V
bright star 3: 275.21085 (18:20:50.60) 7.28717 (+07:17:13.8) 10.16 GSC-V
bright star 4: 275.19537 (18:20:46.89) 7.22635 (+07:13:34.9) 11.77 GSC-V
bright star 5: 275.05371 (18:20:12.89) 7.17657 (+07:10:35.6) 11.84 GSC-V
bright star 6: 275.05420 (18:20:13.01) 7.26443 (+07:15:52.0) 11.69 GSC-V
bright star 7: 275.13004 (18:20:31.21) 7.11351 (+07:06:48.6) 11.58 GSC-V
bright star 8: 275.03177 (18:20:07.62) 7.25504 (+07:15:18.1) 11.79 GSC-V
bright star 9: 275.02695 (18:20:06.47) 7.15007 (+07:09:00.3) 11.63 GSC-V
bright star 10: 275.08301 (18:20:19.92) 7.32779 (+07:19:40.1) 11.95 GSC-V
Mean distance difference (CAT_DELTA) for 190 matched entries is 0.784" for 815603_g878
Mean and std. dev of mag. difference (MAG_DELTA) are 1.547 and 0.702 for 815603_g878
Found 7 entries without IDs and 0 entries that are acceptable afterglow candidates for 815603_g878.
Acceptable entries have no ID, XRT distances < 13.5", 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=275.0940 (18:20:22.56) DEC= 7.1690 (+07:10:08.4)
XRT distances are from RA=275.0915 (18:20:21.96) DEC= 7.1839 (+07:11:02.0)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 11:
ra=275.09058 dec= 7.21696 +/- 1.1" mag=14.91+/-0.35 dist=119.1 REFID=111
Found 6 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
275.0937 7.1833 8.3 -1 USNO-B1 19.88 18.17 18.93
275.0914 7.1854 5.3 -1 USNO-B1 18.30 17.54 17.87
275.0920 7.1827 4.6 -1 USNO-B1 20.32 18.74 19.44
275.0938 7.1832 8.6 -1 GSC2.3 18.15 19.43 18.79
275.0915 7.1853 4.9 -1 GSC2.3 18.05 18.87 17.17
275.0920 7.1826 5.1 -1 GSC2.3 18.58 20.31 99.99
The closest star is 4.63" 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 < 13.5",
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 815603
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.
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB180319 (Swift/BAT trigger 815603) at 01:12:11 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 859 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 0.23.
------- notes for trigger 815603 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180319d01h37m43s035660usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=815603
-expid=543115610 -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/815603/
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 543115610.81558 or about 2018:078:01:26:45 UT
Found 4287 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 50% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 7 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 48 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
20.41 mag. Found 474 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 51% of the Genie image region.
Genie image analysis:
Found 67612.3 counts in the large background region of 4349.0 pixels or a rate
of 15.547 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 19.86 mag. for a
4-arcsec aperture.
Found 14994.3 counts in the XRT position region of 198.0 pixels or a rate of
75.729 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 74.927 +/- 0.837 (1-sigma) cps or
15.09 mag and a range from 15.08 to 15.11 mag. The 3-sigma UL at the XRT
position is 77.437 cps or 15.06 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.58 mag. The closest
srclist source has ra= 275.1005 dec= 7.1959 mag=16.86 sep=53.85".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 275.0918 dec= 7.1853 mag=13.70 sep=5.18". The closest Genie
source has ra= 275.0918 dec= 7.1853 mag=13.70 sep=5.18".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 859 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 18:20:22.02 = 275.09176
DEC(J2000) = +07:11:07.1 = 7.18531
with a 90%-confidence error radius of about 0.61 arc sec. This position is 5.18
arc sec. from the center of the XRT error circle. The estimated magnitude is
13.70 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.23.
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?
543115610 858 WHITE srclist found no candidates.
543115610 858 WHITE image found no candidates.
List afterglow candidates for other finding charts.
543114840 88 WHITE srclist found no candidates.
543114840 88 WHITE image found no candidates.
543115052 300 U 275.09209 7.18720 18.12/18.1 12.1 srclist Yes
543115052 300 U 275.09031 7.18398 18.52/18.1 4.3 srclist Yes
543115052 300 U image found no candidates.
------- Tokens for Quick GCN -------