image overlap message for exposure 1 of trigger 939079
uvot_overlap.pl vrs. 2010-12-20b fem started at 191123d18h36m07s846846usUT
The observation of trigger 939079 started 2019-11-23T10:40:26.5
Examining file ./939079_g101_uvot_sky_image.fits
The exposure ID is 596198426
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (215.2752,22.8517) with a roll angle of 150.3
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (215.2610,22.8420) with a radius of 3.000 arc min
This is 0.978 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (215.2619,22.8599) with a radius of 0.028 arc min
This is 0.889 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
image afterglow message for exposure 1 of trigger 939079
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191123d18h36m12s877537usUT
Observation start time is 2019-11-23T10:40:26.5
Examining file ./939079_g101_uvot_catalog_image.fits
The exposure ID is 596198426
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 2 detected source(s) for 939079_g101
Aspect correction adds -0.00162 degrees (-0.389 sec of time = -5.37 arc sec) to RA
Aspect correction adds -0.00014 degrees (-0.52 arcsec) to Dec
Total aspect correction is 5.40 arcsec
Star catalogs centered at 215.2749 , 22.8555 with radius 2.58 arc min.
n_usno: 59 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 1 matched entries is 1.944" for 939079_g101
Mean and std. dev of mag. difference (MAG_DELTA) are 1.876 and 0.000 for 939079_g101
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 939079_g101.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=215.2610 (14:21:02.64) DEC=22.8420 (+22:50:31.2)
XRT distances are from RA=215.2619 (14:21:02.85) DEC=22.8599 (+22:51:35.7)
*** WARNING 50 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 939079_g101 with genie
ra=215.26196 (14:21:02.87) dec=22.86008 (+22:51:36.3) +/- 0.8" mag=18.13+/-0.15
dist=0.6 REFID=2 major=1.0 minor=0.9 flag=0
Found 3 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
215.2635 22.8557 16.7 -1 USNO-B1 20.78 21.00 20.90
215.2633 22.8561 14.9 -1 USNO-B1 20.98 20.16 20.52
215.2653 22.8624 13.9 -1 USNO-B1 20.47 99.99 99.99
uvot_check_outside found 14 of 14 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=215.26196 (14:21:02.87) dec=22.86008 (+22:51:36.3) +/- 0.8" mag=18.13+/-0.15 dist=0.6 REFID=2 flag=0
There are 1.0304285E+05 counts in the bkg source region of 6309.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 16.333 counts/pixel (5-sig UL in 4" is 19.83 mag) for 939079_g101
There are 1523.5023 counts in the src source region of 51.000000 pixels.
Rate in src region with 4 arcsec radius is 29.873 counts/pixel for 939079_g101
source too far from center -- do not compute local background.
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 20.39, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 939079_596198426_191123d18h36m12s877537usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(215.2752,22.8517,45")
Region file: 939079_596198426_191123d18h36m12s877537usUT_cand_src.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(215.26195500174,22.8600759414199,4")
image paragraph message for exposure 1 of trigger 939079
------ Start for Possible Stand-alone Circular ----
In response to GRB191123 (Swift/BAT trigger 939079) at 10:38:44 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 78 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 14:21:02.87 = 215.26196
DEC(J2000) = +22:51:36.3 = 22.86008
with a 90%-confidence error radius of about 0.75 arc sec. This position is 0.6
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.13 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.04.
------- notes for trigger 939079 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191123d18h36m15s685704usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=939079
-expid=596198426 -meonly -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/939079/
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 596198426.54162 or about 2019:327:10:40:21 UT
Found 233 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 19 sources in
srclist catalog. Found 3 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 2 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.39 mag. Found 55 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 5% of the Genie image region.
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?
596198426 77 WHITE 215.26201 22.86013 18.52/19.2 0.9 srclist Yes
596198426 77 WHITE 215.26196 22.86008 18.13/20.4 0.6 image Yes
List afterglow candidates for other finding charts.
596198638 289 U srclist found no candidates.
596198638 289 U image found no candidates.
596199217 868 WHITE 215.26200 22.85997 18.97/19.2 0.2 srclist Yes
596199217 868 WHITE 215.26198 22.85999 19.11/20.5 0.1 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 22.86008
GRB_ERROR: 0.75
GRB_RA: 215.26196
IMAGE_START_TIME: 10:40:21
MAGNITUDE: 18.13
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT