image overlap message for exposure 1 of trigger 842475
uvot_overlap.pl vrs. 2010-12-20b fem started at 180618d03h28m38s210638usUT
The observation of trigger 842475 started 2018-06-18T00:45:00.1
Examining file ./842475_g107_uvot_sky_image.fits
The exposure ID is 550975500
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 24134 null pixels in the image.
The uvot region is centered at (169.9289,73.8371) with a roll angle of 270.5
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 (169.9370,73.8480) with a radius of 3.000 arc min
This is 0.666 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 at most 6.40 sq. arc min or 0.23 of the BAT error circle
The XRT error circle is centered at (169.9414,73.8373) with a radius of 0.028 arc min
This is 0.209 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 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 842475
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180618d03h28m41s979808usUT
Observation start time is 2018-06-18T00:45:00.1
Examining file ./842475_g107_uvot_catalog_image.fits
The exposure ID is 550975500
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 842475_g107
Aspect correction adds 0.00022 degrees (0.054 sec of time = 0.22 arc sec) to RA
Aspect correction adds 0.00043 degrees ( 1.54 arcsec) to Dec
Total aspect correction is 1.56 arcsec
Star catalogs centered at 169.9226 , 73.8315 with radius 2.35 arc min.
n_usno: 30 n_gsc: 26
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 0 matched entries is 0.000" for 842475_g107
Mean and std. dev of mag. difference (MAG_DELTA) are 0.000 and -1.000 for 842475_g107
Found 6 entries without IDs and 6 entries that are acceptable afterglow candidates for 842475_g107.
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=169.9370 (11:19:44.88) DEC=73.8480 (+73:50:52.8)
XRT distances are from RA=169.9414 (11:19:45.94) DEC=73.8373 (+73:50:14.3)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 842475_g107 with genie
ra=169.91985 (11:19:40.76) dec=73.81433 (+73:48:51.6) +/- 2.7" mag=22.33+/-0.86
dist=85.5 REFID=6 major=1.0 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 122.4 arc sec from the BAT position.
This source is near the edge of image (0.962)
Found 1 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
169.9352 73.8178 19.9 -1 GSC2.3 99.99 21.20 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 1 in the list of sources is a candidate afterglow for 842475_g107 with genie
ra=169.88584 (11:19:32.60) dec=73.81953 (+73:49:10.3) +/- 1.4" mag=21.46+/-0.43
dist=84.9 REFID=5 major=0.8 minor=0.5 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 114.6 arc sec from the BAT position.
This source is near the edge of image (0.965)
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 2 in the list of sources is a candidate afterglow for 842475_g107 with genie
ra=169.87771 (11:19:30.65) dec=73.82047 (+73:49:13.7) +/- 1.0" mag=20.85+/-0.28
dist=88.1 REFID=4 major=1.2 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 115.5 arc sec from the BAT position.
This source is near the edge of image (0.977)
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
169.8803 73.8259 19.7 -1 GSC2.3 16.37 18.60 16.93
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 3 in the list of sources is a candidate afterglow for 842475_g107 with genie
ra=169.86777 (11:19:28.26) dec=73.82233 (+73:49:20.4) +/- 1.2" mag=21.18+/-0.35
dist=91.5 REFID=3 major=1.2 minor=0.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 115.6 arc sec from the BAT position.
This source is near the edge of image (0.965)
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
169.8802 73.8260 18.2 -1 USNO-B1 18.92 16.48 17.56
169.8803 73.8259 18.0 -1 GSC2.3 16.37 18.60 16.93
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 4 in the list of sources is a candidate afterglow for 842475_g107 with genie
ra=169.94167 (11:19:46.00) dec=73.81116 (+73:48:40.2) +/- 1.5" mag=21.57+/-0.46
dist=94.1 REFID=1 major=1.1 minor=0.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 132.7 arc sec from the BAT position.
This source is near the edge of image (0.953)
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 5 in the list of sources is a candidate afterglow for 842475_g107 with genie
ra=169.84467 (11:19:22.72) dec=73.82661 (+73:49:35.8) +/- 1.3" mag=21.35+/-0.39
dist=104.4 REFID=2 major=1.0 minor=0.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 120.4 arc sec from the BAT position.
This source is near the edge of image (0.937)
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
Found 2 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
169.9339 73.8383 8.3 -1 USNO-B1 21.52 19.59 20.45
169.9342 73.8382 8.0 -1 GSC2.3 99.99 21.43 99.99
The closest star is 7.98" away.
List UVOT sources within 10" of the XRT position:
There are 0.0000000 counts in the bkg source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt_bkg source region of 0.0000000 pixels.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.42, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 842475_550975500_180618d03h28m41s979808usUT_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(169.9289,73.8371,45")
Region file: 842475_550975500_180618d03h28m41s979808usUT_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(169.94142,73.83731,8")
Region file: 842475_550975500_180618d03h28m41s979808usUT_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(169.94142,73.83731,25")
fk5;-circle(169.94142,73.83731,15")
image paragraph message for exposure 1 of trigger 842475
IMAGE PROBLEM: incomplete image,
------ Start for Possible Stand-alone Circular ----
In response to GRB180618 (Swift/BAT trigger 842475) at 00:43:12 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 86 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 11:19:45.78 = 169.94074
DEC(J2000) = +73:50:13.3 = 73.83704
with a 90%-confidence error radius of about 1.10 arc sec. This position is 1.2
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.81. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.07.
------- notes for trigger 842475 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180618d03h28m44s824373usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=842475
-expid=550975500 -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/842475/
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 550975500.11282 or about 2018:169:00:44:55 UT
Found 164 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 21 sources in
srclist catalog. Found 2 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 6 source(s) in Genie image catalog. Found 6 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.42 mag. Found 26 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 3% of the
Genie image region. The Genie image is INCOMPLETE with 24134 null pixels.
The closest Genie source has ra= 169.8858 dec= 73.8195 mag=21.46 sep=84.88".
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?
550975500 85 WHITE 169.94074 73.83704 17.81/19.2 1.2 srclist Yes
550975500 85 WHITE image found no candidates.
List afterglow candidates for other finding charts.
550975712 297 U 169.94069 73.83696 17.89/18.1 1.9 srclist Yes
550975712 297 U 169.94103 73.83700 17.39/20.6 2.2 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 73.83704
GRB_ERROR: 1.10
GRB_RA: 169.94074
IMAGE_START_TIME: 00:44:55
MAGNITUDE: 17.81
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT