srclist overlap message for exposure 1 of trigger 863053
uvot_overlap.pl vrs. 2010-12-20b fem started at 180924d00h23m46s043890usUT
The observation of trigger 863053 started 2018-09-24T00:17:17.9
Examining file 863053_g946_uvot_sky_srclist.fits
The exposure ID is 559441037
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (267.5679,-31.7691) with a roll angle of 271.4
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (267.5740,-31.7670) with a radius of 3.000 arc min
This is 0.338 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
Could not find the location of an XRT error circle
srclist afterglow message for exposure 1 of trigger 863053
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180924d00h23m47s815628usUT
Observation start time is 2018-09-24T00:17:17.9
Examining file 863053_g946_uvot_catalog_srclist.fits
The exposure ID is 559441037
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 155 detected source(s) for 863053_g946
Aspect correction adds -0.00083 degrees (-0.199 sec of time = -2.53 arc sec) to RA
Aspect correction adds 0.00040 degrees ( 1.42 arcsec) to Dec
Total aspect correction is 2.90 arcsec
Star catalogs centered at 267.5638 , -31.7701 with radius 6.08 arc min.
n_usno: 1045 n_gsc: 0
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 10.525
RA DEC Mag Color
bright star 0: 267.54063 (17:50:09.75) -31.74546 (-31:44:43.6) 11.44 USNO-V
bright star 1: 267.55632 (17:50:13.52) -31.71042 (-31:42:37.5) 10.52 USNO-V
bright star 2: 267.49947 (17:49:59.87) -31.73661 (-31:44:11.8) 11.05 USNO-V
bright star 3: 267.61311 (17:50:27.15) -31.82101 (-31:49:15.6) 11.46 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 93 matched entries is 0.731" for 863053_g946
Mean and std. dev of mag. difference (MAG_DELTA) are 1.434 and 0.613 for 863053_g946
Found 66 entries without IDs and 4 entries that are acceptable afterglow candidates for 863053_g946.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
55 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=267.5740 (17:50:17.76) DEC=-31.7670 (-31:46:01.2)
XRT distances are as reported in catalog file.
*** WARNING 42 per cent of entries have no IDs.
-----------------
Entry 3 in the list of sources is a candidate afterglow for 863053_g946 with 3x3 stamp
ra=267.59019 (17:50:21.65) dec=-31.76511 (-31:45:54.4) +/- 1.1" mag=18.62+/-0.35
dist=50.0 REFID=64
src: 3 distr. of nearby unmatched sources: 1 0 0 0 0
Found 2 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
267.5896 -31.7687 13.1 -1 USNO-B1 15.11 13.81 14.39
267.5906 -31.7647 2.0 -1 USNO-B1 18.00 15.77 16.76 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 22 in the list of sources is a candidate afterglow for 863053_g946 with 1x1 stamp
ra=267.53369 (17:50:08.09) dec=-31.76468 (-31:45:52.8) +/- 1.1" mag=18.98+/-0.35
dist=123.7 REFID=145
src: 22 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
267.5316 -31.7637 7.3 -1 USNO-B1 19.60 99.99 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 47 in the list of sources is a candidate afterglow for 863053_g946 with 1x1 stamp
ra=267.52374 (17:50:05.70) dec=-31.74425 (-31:44:39.3) +/- 1.1" mag=18.98+/-0.35
dist=174.3 REFID=142
src: 47 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
267.5282 -31.7443 13.5 -1 USNO-B1 99.99 20.39 99.99
267.5206 -31.7410 15.1 -1 USNO-B1 19.53 20.92 20.30
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 52 in the list of sources is a candidate afterglow for 863053_g946 with 3x3 stamp
ra=267.51654 (17:50:03.97) dec=-31.75249 (-31:45:09.0) +/- 1.1" mag=19.60+/-0.35
dist=183.5 REFID=133
src: 52 distr. of nearby unmatched sources: 0 0 0 0 0
Found 4 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
267.5224 -31.7517 18.3 -1 USNO-B1 18.76 18.53 18.63
267.5182 -31.7523 5.0 -1 USNO-B1 19.52 18.88 19.16
267.5129 -31.7560 16.8 -1 USNO-B1 19.31 18.22 18.70
267.5126 -31.7563 18.3 -1 USNO-B1 19.25 99.99 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
separation of 22 and 47 is 79.6 arc sec
separation of 22 and 52 is 68.4 arc sec
separation of 47 and 52 is 36.9 arc sec
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.66, BAT distances < 200",
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 1 of trigger 863053
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB180924 (Swift/BAT trigger 863053) at 00:01:30 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of nominal 150.000 seconds with the White
filter starting 925 seconds after the BAT trigger. No credible afterglow
candidate has been found in the initial data products. Data from the 2.7'x2.7'
sub-image are not available at this time. The 8'x8' region for the list of
sources generated on-board covers 100% of the BAT error circle. The list of
sources is typically complete to about 18 mag. No correction has been made for
the large, but uncertain, extinction expected.
------- notes for trigger 863053 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180924d00h23m50s804422usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=863053
-expid=559441037 -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/863053/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position.
*** Warning -- no exposure found, using srclist assumed value.
No XRT position found for srclist. BAT position found.
UVOT exposure began at MET 559441037.93196 or about 2018:267:00:17:12 UT
Found 1041 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 19% of the srclist region. Found 155 sources in
srclist catalog. Found 66 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
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?
559441037 925 WHITE 267.53369 -31.76468 18.98/18.7 123.7 srclist Yes
559441037 925 WHITE 267.52374 -31.74425 18.98/18.7 174.3 srclist Yes
559441037 925 WHITE 267.51654 -31.75249 19.60/18.7 183.5 srclist Yes
559441037 925 ? image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -31.76700
GRB_ERROR: 200
GRB_RA: 267.57400
IMAGE_START_TIME: 00:17:12
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT