srclist overlap message for exposure 2 of trigger 853882
uvot_overlap.pl vrs. 2010-12-20b fem started at 180818d15h53m03s103572usUT
The observation of trigger 853882 started 2018-08-18T12:44:59.7
Examining file ./853882_g880_uvot_sky_srclist.fits
The exposure ID is 556289099
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (104.2314,39.3144) with a roll angle of 112.2
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 (104.2350,39.3290) with a radius of 3.000 arc min
This is 0.891 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 (104.2247,39.3157) with a radius of 0.028 arc min
This is 0.320 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 853882
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180818d15h53m10s732085usUT
Observation start time is 2018-08-18T12:44:59.7
Examining file ./853882_g880_uvot_catalog_srclist.fits
The exposure ID is 556289099
The exposure is 149.879 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 853882_g880
*** 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 853882_g880 has mag 18.88
Aspect correction adds 0.00033 degrees (0.079 sec of time = 0.91 arc sec) to RA
Aspect correction adds -0.00086 degrees (-3.08 arcsec) to Dec
Total aspect correction is 3.22 arcsec
Star catalogs centered at 104.2510 , 39.3291 with radius 8.26 arc min.
n_usno: 766 n_gsc: 0
*** WARNING -- bright star catalog has 7 entries brighter than 12 mag
The brightest has mag 10.5043
RA DEC Mag Color
bright star 0: 104.16191 (06:56:38.86) 39.28104 (+39:16:51.7) 11.96 USNO-V
bright star 1: 104.14730 (06:56:35.35) 39.36960 (+39:22:10.5) 11.34 USNO-V
bright star 2: 104.21333 (06:56:51.20) 39.42011 (+39:25:12.4) 10.50 USNO-V
bright star 3: 104.20193 (06:56:48.46) 39.42408 (+39:25:26.7) 11.37 USNO-V
bright star 4: 104.22461 (06:56:53.91) 39.43219 (+39:25:55.9) 10.51 USNO-V
bright star 5: 104.18276 (06:56:43.86) 39.22349 (+39:13:24.6) 10.99 USNO-V
bright star 6: 104.33180 (06:57:19.63) 39.43109 (+39:25:51.9) 11.71 USNO-V
Mean distance difference (CAT_DELTA) for 120 matched entries is 0.702" for 853882_g880
Mean and std. dev of mag. difference (MAG_DELTA) are 1.102 and 0.687 for 853882_g880
Found 70 entries without IDs and 4 entries that are acceptable afterglow candidates for 853882_g880.
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.
58 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=104.2350 (06:56:56.40) DEC=39.3290 (+39:19:44.4)
XRT distances are from RA=104.2247 (06:56:53.93) DEC=39.3157 (+39:18:56.6)
*** WARNING 36 per cent of entries have no IDs.
-----------------
Entry 9 in the list of sources is a candidate afterglow for 853882_g880 with 1x1 stamp
ra=104.24269 (06:56:58.25) dec=39.28707 (+39:17:13.4) +/- 1.1" mag=18.88+/-0.35
dist=114.7 REFID=184
*** The position of this source is inconsistent with the XRT position.
The position is 152.5 arc sec from the BAT position.
src: 9 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
104.2497 39.2866 19.7 -1 USNO-B1 19.84 17.97 18.80
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 32 in the list of sources is a candidate afterglow for 853882_g880 with 1x1 stamp
ra=104.23929 (06:56:57.43) dec=39.37216 (+39:22:19.8) +/- 1.1" mag=18.74+/-0.35
dist=207.2 REFID=165
*** The position of this source is inconsistent with the XRT position.
The position is 155.8 arc sec from the BAT position.
src: 32 distr. of nearby unmatched sources: 1 0 0 0 0
Found 2 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
104.2398 39.3727 2.3 -1 USNO-B1 17.02 15.79 16.33 *
104.2345 39.3733 13.9 -1 USNO-B1 20.86 20.57 20.70
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 33 in the list of sources is a candidate afterglow for 853882_g880 with 1x1 stamp
ra=104.23822 (06:56:57.17) dec=39.37272 (+39:22:21.8) +/- 1.1" mag=18.88+/-0.35
dist=208.6 REFID=167
*** The position of this source is inconsistent with the XRT position.
The position is 157.6 arc sec from the BAT position.
src: 33 distr. of nearby unmatched sources: 1 0 0 0 0
Found 2 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
104.2398 39.3727 4.4 -1 USNO-B1 17.02 15.79 16.33
104.2345 39.3733 10.5 -1 USNO-B1 20.86 20.57 20.70
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 50 in the list of sources is a candidate afterglow for 853882_g880 with 1x1 stamp
ra=104.30582 (06:57:13.40) dec=39.33629 (+39:20:10.7) +/- 1.1" mag=18.83+/-0.35
dist=237.7 REFID=185
*** The position of this source is inconsistent with the XRT position.
The position is 198.9 arc sec from the BAT position.
src: 50 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
104.3048 39.3379 6.5 -1 USNO-B1 20.99 19.85 20.36
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
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 853882
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB180818 (Swift/BAT trigger 853882) at 12:30:18 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. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.09.
------- notes for trigger 853882 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180818d15h53m13s038366usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=853882
-expid=556289099 -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/853882/
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 556289099.68414 or about 2018:230:12:44:54 UT
Found 762 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 70 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 7 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.96 mag. Found 78 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region.
Genie image analysis:
Found 218973.7 counts in the large background region of 6119.0 pixels or a rate
of 35.786 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 19.41 mag. for a
4-arcsec aperture.
Found 7154.3 counts in the XRT position region of 199.0 pixels or a rate of
35.951 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.207 +/- 0.607 (1-sigma) cps or
21.49 mag and a range from 20.00 to 99.99 mag. The 3-sigma UL at the XRT
position is 2.029 cps or 19.01 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.88 mag. The closest
srclist source has ra= 104.2263 dec= 39.3029 mag=18.71 sep=46.26". The closest
Genie source has ra= 104.2335 dec= 39.3106 mag=19.53 sep=30.61".
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?
556289099 859 WHITE srclist found no candidates.
556289099 859 WHITE image found no candidates.
List afterglow candidates for other finding charts.
556288452 212 WHITE srclist found no candidates.
556288452 212 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 39.31572
GRB_ERROR: 5
GRB_RA: 104.22471
IMAGE_START_TIME: 12:44:54
MAGNITUDE: 19.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT