srclist overlap message for exposure 2 of trigger 871103
uvot_overlap.pl vrs. 2010-12-20b fem started at 181108d20h08m47s388583usUT
The observation of trigger 871103 started 2018-11-08T19:51:59.5
Examining file ./871103_g884_uvot_sky_srclist.fits
The exposure ID is 563399519
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (187.9943,13.2854) with a roll angle of 129.3
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 (188.0350,13.3380) with a radius of 3.000 arc min
This is 3.949 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 27.50 sq. arc min or 0.97 of the BAT error circle
The XRT error circle is centered at (188.0629,13.3421) with a radius of 0.047 arc min
This is 5.254 arc min from the center of the uvot region
The area of the XRT error circle is 0.007 sq. arc min
The UVOT/XRT overlap is 0.007 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 871103
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181108d20h08m56s208669usUT
Observation start time is 2018-11-08T19:51:59.5
Examining file ./871103_g884_uvot_catalog_srclist.fits
The exposure ID is 563399519
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 39 detected source(s) for 871103_g884
Aspect correction adds -0.00063 degrees (-0.151 sec of time = -2.20 arc sec) to RA
Aspect correction adds -0.00086 degrees (-3.09 arcsec) to Dec
Total aspect correction is 3.79 arcsec
Star catalogs centered at 187.9910 , 13.3051 with radius 8.73 arc min.
n_usno: 628 n_gsc: 0
*** WARNING -- bright star catalog has 8 entries brighter than 12 mag
The brightest has mag 7.75
RA DEC Mag Color
bright star 0: 188.05696 (12:32:13.67) 13.24669 (+13:14:48.1) 11.70 USNO-V
bright star 1: 188.00726 (12:32:01.74) 13.42353 (+13:25:24.7) 10.96 USNO-V
bright star 2: 188.04064 (12:32:09.75) 13.41846 (+13:25:06.5) 11.30 USNO-V
bright star 3: 188.04247 (12:32:10.19) 13.41946 (+13:25:10.0) 8.67 USNO-V
bright star 4: 188.04386 (12:32:10.53) 13.41958 (+13:25:10.5) 9.23 USNO-V
bright star 5: 188.04522 (12:32:10.85) 13.41941 (+13:25:09.9) 10.41 USNO-V
bright star 6: 188.04258 (12:32:10.22) 13.42078 (+13:25:14.8) 7.75 USNO-R
bright star 7: 188.04628 (12:32:11.11) 13.41946 (+13:25:10.1) 8.15 USNO-R
Mean distance difference (CAT_DELTA) for 30 matched entries is 0.659" for 871103_g884
Mean and std. dev of mag. difference (MAG_DELTA) are 1.357 and 0.618 for 871103_g884
Found 9 entries without IDs and 3 entries that are acceptable afterglow candidates for 871103_g884.
Acceptable entries have no ID, XRT distances < 7", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=188.0350 (12:32:08.40) DEC=13.3380 (+13:20:16.8)
XRT distances are from RA=188.0629 (12:32:15.09) DEC=13.3421 (+13:20:31.7)
-----------------
Entry 20 in the list of sources is a candidate afterglow for 871103_g884 with 5x5 stamp
ra=187.99325 (12:31:58.38) dec=13.34592 (+13:20:45.3) +/- 1.1" mag=19.29+/-0.35
dist=244.3 REFID=33
*** The position of this source is inconsistent with the XRT position.
The position is 149.0 arc sec from the BAT position.
src: 20 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 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)
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 25 in the list of sources is a candidate afterglow for 871103_g884 with 5x5 stamp
ra=188.01777 (12:32:04.26) dec=13.34205 (+13:20:31.4) +/- 1.1" mag=19.23+/-0.35
dist=158.0 REFID=30
*** The position of this source is inconsistent with the XRT position.
The position is 62.1 arc sec from the BAT position.
src: 25 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 37 in the list of sources is a candidate afterglow for 871103_g884 with 5x5 stamp
ra=188.06205 (12:32:14.89) dec=13.38660 (+13:23:11.8) +/- 1.1" mag=19.78+/-0.35
dist=160.1 REFID=38
*** The position of this source is inconsistent with the XRT position.
The position is 199.0 arc sec from the BAT position.
src: 37 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
188.0620 13.3874 3.0 -1 USNO-B1 18.33 16.22 17.16 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 1 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
188.0632 13.3425 1.7 -1 USNO-B1 19.21 18.40 18.76
The closest star is 1.72" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=188.06323 (12:32:15.17) dec=13.34287 (+13:20:34.3) +/- 1.1" mag=18.59+/-0.35 dist=2.9 REFID=24
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 7",
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 871103
------ Start for Possible Stand-alone Circular ----
In response to GRB181108 (Swift/BAT trigger 871103) at 19:37:14 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 863 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 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 0.03.
------- notes for trigger 871103 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181108d20h08m57s222826usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=871103
-expid=563399519 -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/871103/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
*** Warning -- no exposure found, using srclist assumed value.
XRT position found for srclist. BAT position found.
UVOT exposure began at MET 563399519.4632 or about 2018:312:19:51:54 UT
Found 624 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 39 sources in
srclist catalog. Found 9 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 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 188.0632 dec= 13.3429 mag=18.59 sep=2.89".
The closest srclist source has ra= 188.0632 dec= 13.3429 mag=18.59 sep=2.89".
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 nominal 150.000 seconds with the White
filter starting 863 seconds after the BAT trigger. There is a candidate
afterglow in the list of sources generated on-board at
RA(J2000) = 12:32:15.18 = 188.06323
DEC(J2000) = +13:20:34.3 = 13.34287
with a 90%-confidence error radius of about 1.10 arc sec. This position is 2.89
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.59 with a 1-sigma error of about 0.35. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.03.
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?
563399519 863 WHITE srclist found no candidates.
563399519 863 ? image data are not available.
List afterglow candidates for other finding charts.
563398868 212 WHITE srclist found no candidates.
563398868 212 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 13.34214
GRB_ERROR: 7
GRB_RA: 188.06288
IMAGE_START_TIME: 19:51:54
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT