srclist overlap message for exposure 2 of trigger 853824
uvot_overlap.pl vrs. 2010-12-20b fem started at 180818d05h33m04s721714usUT
The observation of trigger 853824 started 2018-08-18T03:16:26.1
Examining file ./853824_g261_uvot_sky_srclist.fits
The exposure ID is 556254986
The exposure time is undefined.
The filter is U.
The uvot region is centered at (169.6319,-48.3420) with a roll angle of 336.0
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 (169.6110,-48.3440) with a radius of 3.000 arc min
This is 0.842 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 (169.6368,-48.3444) with a radius of 0.032 arc min
This is 0.242 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 853824
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180818d05h33m15s356220usUT
Observation start time is 2018-08-18T03:16:26.1
Examining file ./853824_g261_uvot_catalog_srclist.fits
The exposure ID is 556254986
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 853824_g261
*** 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 853824_g261 has mag 18.21
Aspect correction adds 0.00100 degrees (0.239 sec of time = 2.38 arc sec) to RA
Aspect correction adds 0.00111 degrees ( 4.01 arcsec) to Dec
Total aspect correction is 4.66 arcsec
Star catalogs centered at 169.6293 , -48.3402 with radius 8.64 arc min.
n_usno: 3212 n_gsc: 0
*** WARNING -- bright star catalog has 12 entries brighter than 12 mag
The brightest has mag 9.4952
RA DEC Mag Color
bright star 0: 169.57303 (11:18:17.53) -48.37272 (-48:22:21.8) 11.13 USNO-R
bright star 1: 169.54243 (11:18:10.18) -48.37181 (-48:22:18.5) 11.22 USNO-V
bright star 2: 169.63118 (11:18:31.48) -48.27184 (-48:16:18.6) 11.08 USNO-V
bright star 3: 169.73650 (11:18:56.76) -48.30915 (-48:18:33.0) 9.50 USNO-V
bright star 4: 169.50816 (11:18:01.96) -48.34862 (-48:20:55.0) 11.64 USNO-V
bright star 5: 169.63996 (11:18:33.59) -48.42122 (-48:25:16.4) 11.32 USNO-V
bright star 6: 169.52670 (11:18:06.41) -48.27909 (-48:16:44.7) 11.32 USNO-R
bright star 7: 169.52869 (11:18:06.88) -48.40520 (-48:24:18.7) 11.87 USNO-V
bright star 8: 169.71295 (11:18:51.11) -48.41581 (-48:24:56.9) 11.89 USNO-V
bright star 9: 169.62040 (11:18:28.90) -48.45764 (-48:27:27.5) 10.87 USNO-V
bright star 10: 169.48554 (11:17:56.53) -48.26151 (-48:15:41.4) 11.91 USNO-V
bright star 11: 169.83312 (11:19:19.95) -48.31224 (-48:18:44.0) 11.97 USNO-V
Mean distance difference (CAT_DELTA) for 180 matched entries is 0.904" for 853824_g261
Mean and std. dev of mag. difference (MAG_DELTA) are 1.397 and 0.919 for 853824_g261
Found 23 entries without IDs and 6 entries that are acceptable afterglow candidates for 853824_g261.
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.
5 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=169.6110 (11:18:26.64) DEC=-48.3440 (-48:20:38.4)
XRT distances are from RA=169.6368 (11:18:32.83) DEC=-48.3444 (-48:20:39.9)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 853824_g261 with 1x1 stamp
ra=169.64056 (11:18:33.73) dec=-48.32749 (-48:19:38.9) +/- 1.1" mag=17.89+/-0.35
dist=61.6 REFID=168
*** The position of this source is inconsistent with the XRT position.
The position is 92.4 arc sec from the BAT position.
src: 2 srclist_match has ID
src: 2 distr. of nearby unmatched sources: 0 0 0 0 0
Found 7 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
169.6386 -48.3325 18.8 -1 USNO-B1 20.76 17.98 19.21
169.6396 -48.3330 19.9 -1 USNO-B1 21.77 18.30 19.84
169.6398 -48.3273 2.0 -1 USNO-B1 18.01 16.39 17.11 *
169.6443 -48.3253 11.9 -1 USNO-B1 19.66 17.95 18.71
169.6449 -48.3250 13.7 -1 USNO-B1 99.99 17.01 99.99
169.6453 -48.3250 14.5 -1 USNO-B1 19.31 17.61 18.36
169.6449 -48.3228 20.0 -1 USNO-B1 20.11 18.16 19.03
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 4 in the list of sources is a candidate afterglow for 853824_g261 with 1x1 stamp
ra=169.60899 (11:18:26.16) dec=-48.33027 (-48:19:49.0) +/- 1.1" mag=18.12+/-0.35
dist=83.8 REFID=158
*** The position of this source is inconsistent with the XRT position.
The position is 49.7 arc sec from the BAT position.
src: 4 srclist_match has ID
src: 4 distr. of nearby unmatched sources: 1 0 0 0 0
Found 7 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
169.6141 -48.3287 13.4 -1 USNO-B1 21.06 19.27 20.07
169.6096 -48.3299 1.9 -1 USNO-B1 17.44 16.45 16.89 *
169.6083 -48.3309 2.7 -1 USNO-B1 13.40 99.99 99.99 *
169.6070 -48.3316 6.7 -1 USNO-B1 13.59 12.68 13.08 *
169.6029 -48.3323 16.2 -1 USNO-B1 21.70 15.68 18.35
169.6034 -48.3314 13.9 -1 USNO-B1 18.63 99.99 99.99
169.6031 -48.3312 14.6 -1 USNO-B1 19.92 18.00 18.85
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 15 in the list of sources is a candidate afterglow for 853824_g261 with 1x1 stamp
ra=169.64695 (11:18:35.27) dec=-48.37726 (-48:22:38.1) +/- 1.1" mag=17.40+/-0.35
dist=120.7 REFID=189
*** The position of this source is inconsistent with the XRT position.
The position is 147.4 arc sec from the BAT position.
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.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
169.6425 -48.3758 11.9 -1 USNO-B1 99.99 19.41 99.99
169.6415 -48.3762 13.7 -1 USNO-B1 17.56 16.81 17.14
169.6451 -48.3770 4.6 -1 USNO-B1 12.88 12.60 12.72 *
169.6525 -48.3775 13.2 -1 USNO-B1 19.17 17.35 18.16
169.6444 -48.3793 9.5 -1 USNO-B1 99.99 17.85 99.99
169.6446 -48.3798 10.7 -1 USNO-B1 21.40 19.21 20.18
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 16 in the list of sources is a candidate afterglow for 853824_g261 with 1x1 stamp
ra=169.58831 (11:18:21.19) dec=-48.35946 (-48:21:34.1) +/- 1.1" mag=17.28+/-0.35
dist=128.0 REFID=163
*** The position of this source is inconsistent with the XRT position.
The position is 77.7 arc sec from the BAT position.
src: 16 distr. of nearby unmatched sources: 0 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
169.5864 -48.3593 4.8 -1 USNO-B1 12.54 12.04 12.26 *
169.5830 -48.3620 15.6 -1 USNO-B1 18.63 17.10 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 24 in the list of sources is a candidate afterglow for 853824_g261 with 1x1 stamp
ra=169.61372 (11:18:27.29) dec=-48.31277 (-48:18:46.0) +/- 1.1" mag=17.70+/-0.35
dist=126.6 REFID=128
*** The position of this source is inconsistent with the XRT position.
The position is 112.6 arc sec from the BAT position.
src: 24 distr. of nearby unmatched sources: 0 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
169.6090 -48.3149 13.7 -1 USNO-B1 19.72 18.20 18.87
169.6147 -48.3127 2.4 -1 USNO-B1 17.14 15.50 16.23 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 28 in the list of sources is a candidate afterglow for 853824_g261 with 3x3 stamp
ra=169.65960 (11:18:38.30) dec=-48.37969 (-48:22:46.9) +/- 1.1" mag=14.64+/-0.35
dist=138.2 REFID=11
*** The position of this source is inconsistent with the XRT position.
The position is 173.3 arc sec from the BAT position.
src: 28 srclist_match has ID
src: 28 distr. of nearby unmatched sources: 1 1 0 0 0
Found 7 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
169.6525 -48.3775 18.8 -1 USNO-B1 19.17 17.35 18.16
169.6609 -48.3748 17.8 -1 USNO-B1 17.40 15.30 16.23
169.6595 -48.3802 1.8 -1 USNO-B1 14.18 12.91 13.47 *
169.6583 -48.3811 6.1 -1 USNO-B1 20.82 11.86 15.84 *
169.6601 -48.3813 6.1 -1 USNO-B1 12.66 12.01 12.30 *
169.6657 -48.3810 15.4 -1 USNO-B1 19.41 17.97 18.61
169.6608 -48.3831 12.4 -1 USNO-B1 15.23 13.48 14.25
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
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 < 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 853824
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB180818 (Swift/BAT trigger 853824) at 03:12:04 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
240 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.11.
------- notes for trigger 853824 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180818d05h33m20s092519usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=853824
-expid=556254986 -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/853824/
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 556254986.1206 or about 2018:230:03:16:21 UT
Found 3208 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 23 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 25 source(s) in Genie image catalog. 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 19.97 mag. Found 322 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
32% of the Genie image region.
Genie image analysis:
Found 41075.6 counts in the large background region of 5974.0 pixels or a rate
of 6.876 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 19.46 mag. for a
4-arcsec aperture.
Found 1351.6 counts in the XRT position region of 198.0 pixels or a rate of
6.826 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.096 +/- 0.159 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.476 cps or 19.19 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 18.21
mag. The closest srclist source has ra= 169.6353 dec= -48.3328 mag=17.65
sep=41.97". The closest Genie source has ra= 169.6396 dec= -48.3466 mag=18.19
sep=10.26".
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?
556254986 240 U srclist found no candidates.
556254986 240 U image found no candidates.
List afterglow candidates for other finding charts.
556254828 82 WHITE srclist found no candidates.
556254828 82 WHITE image found no candidates.
556255613 867 WHITE srclist found no candidates.
556255613 867 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -48.34442
GRB_ERROR: 5
GRB_RA: 169.63679
IMAGE_START_TIME: 03:16:21
MAGNITUDE: 19.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT