image overlap message for exposure 2 of trigger 840853
uvot_overlap.pl vrs. 2010-12-20b fem started at 180613d21h09m08s403895usUT
The observation of trigger 840853 started 2018-06-13T15:50:54.6
Examining file ./840853_g875_uvot_sky_image.fits
The exposure ID is 550597854
The exposure time is 149.868 (seconds)
The filter is U.
The uvot region is centered at (211.5159,-43.0731) with a roll angle of 261.0
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 (211.5620,-43.0760) with a radius of 3.000 arc min
This is 2.028 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 5.96 sq. arc min or 0.21 of the BAT error circle
The XRT error circle is centered at (211.5206,-43.0724) with a radius of 0.082 arc min
This is 0.209 arc min from the center of the uvot region
The area of the XRT error circle is 0.021 sq. arc min
The UVOT/XRT overlap is 0.021 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 840853
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180613d21h09m39s247099usUT
Observation start time is 2018-06-13T15:50:54.6
Examining file ./840853_g875_uvot_catalog_image.fits
The exposure ID is 550597854
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is U
There are 22 detected source(s) for 840853_g875
Aspect correction adds -0.00031 degrees (-0.074 sec of time = -0.81 arc sec) to RA
Aspect correction adds -0.00007 degrees (-0.24 arcsec) to Dec
Total aspect correction is 0.85 arcsec
Star catalogs centered at 211.5181 , -43.0768 with radius 2.65 arc min.
n_usno: 303 n_gsc: 406
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 6.22604
RA DEC Mag Color
bright star 0: 211.54544 (14:06:10.91) -43.09170 (-43:05:30.1) 6.23 USNO-V
bright star 1: 211.48569 (14:05:56.57) -43.06884 (-43:04:07.8) 11.44 USNO-V
bright star 2: 211.48540 (14:05:56.50) -43.06788 (-43:04:04.4) 10.39 USNO-R
Mean distance difference (CAT_DELTA) for 22 matched entries is 0.621" for 840853_g875
Mean and std. dev of mag. difference (MAG_DELTA) are 0.943 and 1.375 for 840853_g875
Found 4 entries without IDs and 1 entries that are acceptable afterglow candidates for 840853_g875.
Acceptable entries have no ID, XRT distances < 12.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
3 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=211.5620 (14:06:14.88) DEC=-43.0760 (-43:04:33.6)
XRT distances are from RA=211.5206 (14:06:04.94) DEC=-43.0724 (-43:04:20.5)
-----------------
Entry 6 in the list of sources is a candidate afterglow for 840853_g875 with genie
ra=211.53575 (14:06:08.58) dec=-43.07586 (-43:04:33.1) +/- 0.6" mag=17.46+/-0.15
dist=41.8 REFID=16 major=2.8 minor=2.1 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 69.0 arc sec from the BAT position.
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
211.5319 -43.0728 15.0 -1 USNO-B1 19.86 18.55 19.13
211.5355 -43.0742 5.9 -1 USNO-B1 19.35 18.57 18.92
211.5318 -43.0725 16.0 -1 GSC2.3 18.84 20.57 99.99
211.5334 -43.0726 13.2 -1 GSC2.3 19.97 99.99 99.99
211.5358 -43.0761 0.9 -1 GSC2.3 99.99 18.24 99.99 *
211.5355 -43.0743 5.7 -1 GSC2.3 99.99 19.92 99.99
211.5360 -43.0719 14.4 -1 GSC2.3 19.43 21.16 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
Found 4 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
211.5210 -43.0718 2.4 -1 USNO-B1 20.24 20.54 20.41
211.5221 -43.0741 7.6 -1 GSC2.3 20.50 99.99 99.99
211.5204 -43.0727 1.3 -1 GSC2.3 18.54 19.97 99.99
211.5204 -43.0707 5.9 -1 GSC2.3 99.99 22.04 99.99
The closest star is 1.26" away.
List UVOT sources within 10" of the XRT position:
There are 16339.741 counts in the bkg source region of 5792.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.821 counts/pixel (5-sig UL in 4" is 19.35 mag) for 840853_g875
There are 538.27368 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 2.691 counts/pixel for 840853_g875
There are 2788.9646 counts in the xrt_bkg source region of 1017.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 2.742 counts/pixel (5-sig UL in 4" is 19.36 mag) for 840853_g875
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 19.90, XRT distances < 12.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 840853_550597854_180613d21h09m39s247099usUT_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(211.5159,-43.0731,45")
fk5;-circle(211.515420173627,-43.0662582115801,6")
fk5;-circle(211.526003913043,-43.0675198458192,6")
fk5;-circle(211.515662093534,-43.0766568774991,6")
fk5;-circle(211.532049710322,-43.070279474441,6")
fk5;-circle(211.504440820852,-43.0689091692043,6")
fk5;-circle(211.497562166368,-43.0688367159487,6")
Region file: 840853_550597854_180613d21h09m39s247099usUT_xrt.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(211.52058,-43.07236,8")
Region file: 840853_550597854_180613d21h09m39s247099usUT_xrt_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(211.52058,-43.07236,25")
fk5;-circle(211.52058,-43.07236,15")
fk5;-circle(211.515420173627,-43.0662582115801,6")
fk5;-circle(211.526003913043,-43.0675198458192,6")
fk5;-circle(211.515662093534,-43.0766568774991,6")
image paragraph message for exposure 2 of trigger 840853
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB180613 (Swift/BAT trigger 840853) at 15:36:18 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the U filter starting
854 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
0.09.
------- notes for trigger 840853 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180613d21h09m47s137725usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=840853
-expid=550597854 -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/840853/
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 550597854.58944 or about 2018:164:15:50:49 UT
Found 3116 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 27% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 91 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 17.84 mag.
Found 22 source(s) in Genie image catalog. Found 4 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.90 mag. Found 398 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
39% of the Genie image region.
Genie image analysis:
Found 16339.7 counts in the large background region of 5792.0 pixels or a rate
of 2.821 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 19.39 mag. for a
4-arcsec aperture.
Found 538.3 counts in the XRT position region of 200.0 pixels or a rate of
2.691 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.068 +/- 0.169 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.508 cps or 19.11 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 18.60
mag. The closest srclist source has ra= 211.5261 dec= -43.0679 mag=18.41
sep=21.67". The closest Genie source has ra= 211.5157 dec= -43.0767 mag=20.06
sep=20.16".
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?
550597854 854 U srclist found no candidates.
550597854 854 U image found no candidates.
List afterglow candidates for other finding charts.
550597154 154 U srclist found no candidates.
550597154 154 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -43.07236
GRB_ERROR: 12.25
GRB_RA: 211.52058
IMAGE_START_TIME: 15:50:49
MAGNITUDE: 19.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT