srclist overlap message for exposure 2 of trigger 843122
uvot_overlap.pl vrs. 2010-12-20b fem started at 180620d10h44m54s842206usUT
The observation of trigger 843122 started 2018-06-20T08:49:51.5
Examining file ./843122_g892_uvot_sky_srclist.fits
The exposure ID is 551177391
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (279.8846,23.2714) with a roll angle of 13.6
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 (279.8830,23.2650) with a radius of 3.000 arc min
This is 0.395 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 (279.8965,23.2442) with a radius of 0.030 arc min
This is 1.761 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 843122
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180620d10h45m04s799977usUT
Observation start time is 2018-06-20T08:49:51.5
Examining file ./843122_g892_uvot_catalog_srclist.fits
The exposure ID is 551177391
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 843122_g892
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.491
srclist_overlap returned: xrt_overlap 0.000
Dimmest detected source in 843122_g892 has mag 19.09
Aspect correction adds 0.00022 degrees (0.052 sec of time = 0.71 arc sec) to RA
Aspect correction adds 0.00034 degrees ( 1.21 arcsec) to Dec
Total aspect correction is 1.40 arcsec
Star catalogs centered at 279.8509 , 23.2875 with radius 7.86 arc min.
n_usno: 2598 n_gsc: 2691
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 10.22
RA DEC Mag Color
bright star 0: 279.86621 (18:39:27.89) 23.27623 (+23:16:34.4) 11.05 USNO-V
bright star 1: 279.90941 (18:39:38.26) 23.32601 (+23:19:33.6) 11.90 USNO-V
bright star 2: 279.91078 (18:39:38.59) 23.24268 (+23:14:33.6) 11.71 USNO-V
bright star 3: 279.74297 (18:38:58.31) 23.29410 (+23:17:38.8) 10.22 USNO-R
Mean distance difference (CAT_DELTA) for 182 matched entries is 0.691" for 843122_g892
Mean and std. dev of mag. difference (MAG_DELTA) are 1.232 and 0.408 for 843122_g892
Found 11 entries without IDs and 2 entries that are acceptable afterglow candidates for 843122_g892.
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=279.8830 (18:39:31.92) DEC=23.2650 (+23:15:54.0)
XRT distances are from RA=279.8965 (18:39:35.15) DEC=23.2442 (+23:14:39.0)
-----------------
Entry 21 in the list of sources is a candidate afterglow for 843122_g892 with 1x1 stamp
ra=279.85026 (18:39:24.06) dec=23.24391 (+23:14:38.1) +/- 1.1" mag=18.88+/-0.35
dist=152.8 REFID=163
*** The position of this source is inconsistent with the XRT position.
The position is 132.3 arc sec from the BAT position.
src: 21 distr. of nearby unmatched sources: 0 0 0 0 0
Found 17 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
279.8539 23.2461 14.5 -1 USNO-B1 20.00 18.48 19.15
279.8542 23.2446 13.4 -1 USNO-B1 20.15 18.63 19.30
279.8495 23.2444 3.1 -1 USNO-B1 19.47 17.71 18.49 *
279.8496 23.2437 2.2 -1 USNO-B1 16.87 15.67 16.20 *
279.8449 23.2431 17.9 -1 USNO-B1 18.20 17.49 17.81
279.8523 23.2401 15.2 -1 USNO-B1 18.05 16.88 17.40
279.8516 23.2391 18.0 -1 USNO-B1 15.12 14.31 14.67
279.8498 23.2385 19.7 -1 USNO-B1 15.96 16.68 16.36
279.8539 23.2461 14.5 -1 GSC2.3 18.47 20.17 99.99
279.8447 23.2460 19.9 -1 GSC2.3 99.99 99.99 99.99
279.8542 23.2445 13.4 -1 GSC2.3 18.90 20.39 99.99
279.8496 23.2437 2.2 -1 GSC2.3 15.84 16.93 16.70 *
279.8450 23.2430 17.8 -1 GSC2.3 17.58 18.28 17.74
279.8524 23.2404 14.6 -1 GSC2.3 17.72 19.14 99.99
279.8476 23.2403 15.6 -1 GSC2.3 19.81 99.99 99.99
279.8518 23.2389 18.7 -1 GSC2.3 14.75 15.56 14.13
279.8498 23.2386 19.1 -1 GSC2.3 16.48 17.11 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 29 in the list of sources is a candidate afterglow for 843122_g892 with 3x3 stamp
ra=279.84976 (18:39:23.94) dec=23.23875 (+23:14:19.5) +/- 1.1" mag=18.37+/-0.35
dist=155.7 REFID=93
*** The position of this source is inconsistent with the XRT position.
The position is 145.0 arc sec from the BAT position.
src: 29 srclist_match has ID
src: 29 distr. of nearby unmatched sources: 0 0 0 1 0
Found 12 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
279.8496 23.2437 17.9 -1 USNO-B1 16.87 15.67 16.20
279.8523 23.2401 9.6 -1 USNO-B1 18.05 16.88 17.40
279.8516 23.2391 6.2 -1 USNO-B1 15.12 14.31 14.67
279.8498 23.2385 1.0 -1 USNO-B1 15.96 16.68 16.36 *
279.8524 23.2356 14.4 -1 USNO-B1 18.51 17.67 18.04
279.8496 23.2437 17.8 -1 GSC2.3 15.84 16.93 16.70
279.8524 23.2404 10.6 -1 GSC2.3 17.72 19.14 99.99
279.8476 23.2403 9.2 -1 GSC2.3 19.81 99.99 99.99
279.8518 23.2389 6.8 -1 GSC2.3 14.75 15.56 14.13
279.8456 23.2390 13.6 -1 GSC2.3 19.77 99.99 99.99
279.8498 23.2386 0.4 -1 GSC2.3 16.48 17.11 99.99 *
279.8525 23.2355 14.7 -1 GSC2.3 17.70 18.65 18.09
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
279.8989 23.2436 8.2 -1 USNO-B1 19.27 18.34 18.75
279.8989 23.2436 8.4 -1 GSC2.3 18.22 19.29 18.25
The closest star is 8.20" 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 843122
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.
------ Start for Possible Stand-alone Circular ----
In response to GRB180620 (Swift/BAT trigger 843122) at 08:34:58 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 872 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 expected extinction corresponding to E(B-V) of 0.13.
------- notes for trigger 843122 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180620d10h45m11s047968usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=843122
-expid=551177391 -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/843122/
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 551177391.54348 or about 2018:171:08:49:46 UT
Found 2625 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 29% 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 35 source(s) in Genie image catalog. Found 3 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.75 mag. Found 253 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
28% of the Genie image region.
Genie image analysis:
Found 45186.0 counts in the large background region of 5395.0 pixels or a rate
of 8.376 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 20.20 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 19.09 mag. The closest srclist
source has ra= 279.8756 dec= 23.2589 mag=18.18 sep=87.13". The closest Genie
source has ra= 279.8999 dec= 23.2531 mag=19.98 sep=33.98".
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?
551177391 871 WHITE srclist found no candidates.
551177391 871 WHITE image found no candidates.
List afterglow candidates for other finding charts.
551176789 269 WHITE 279.89618 23.24437 18.24/19.2 1.2 srclist Yes
551176789 269 WHITE image found no candidates.
------- Tokens for Quick GCN -------