image overlap message for exposure 2 of trigger 844615
uvot_overlap.pl vrs. 2010-12-20b fem started at 180626d10h08m34s295670usUT
The observation of trigger 844615 started 2018-06-26T08:27:14.0
Examining file ./844615_g356_uvot_sky_image.fits
The exposure ID is 551694433
The exposure time is 249.946 (seconds)
The filter is U.
*** Warning -- found 20138 null pixels in the image.
The uvot region is centered at (243.5638,14.7677) with a roll angle of 320.5
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 (243.5670,14.7640) with a radius of 3.000 arc min
This is 0.290 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 4.10 sq. arc min or 0.14 of the BAT error circle
The XRT error circle is centered at (243.5760,14.7569) with a radius of 0.030 arc min
This is 0.961 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 2 of trigger 844615
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180626d10h08m54s938674usUT
Observation start time is 2018-06-26T08:27:14.0
Examining file ./844615_g356_uvot_catalog_image.fits
The exposure ID is 551694433
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 4 detected source(s) for 844615_g356
Aspect correction adds 0.00034 degrees (0.082 sec of time = 1.19 arc sec) to RA
Aspect correction adds 0.00112 degrees ( 4.03 arcsec) to Dec
Total aspect correction is 4.20 arcsec
Star catalogs centered at 243.5605 , 14.7622 with radius 2.30 arc min.
n_usno: 103 n_gsc: 79
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.556" for 844615_g356
Mean and std. dev of mag. difference (MAG_DELTA) are 0.942 and 0.555 for 844615_g356
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 844615_g356.
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=243.5670 (16:14:16.08) DEC=14.7640 (+14:45:50.4)
XRT distances are from RA=243.5760 (16:14:18.25) DEC=14.7569 (+14:45:24.9)
Found 0 entries in star catalog(s) within 10" of the XRT position.
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.
XRT source is too far (57.6328066703032") 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 18.32, 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: 844615_551694433_180626d10h08m54s938674usUT_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(243.5638,14.7677,45")
Region file: 844615_551694433_180626d10h08m54s938674usUT_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(243.57604,14.75692,8")
image paragraph message for exposure 2 of trigger 844615
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB180626 (Swift/BAT trigger 844615) at 08:21:16 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
335 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 none of the
XRT error circle. 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 0.04.
------- notes for trigger 844615 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180626d10h08m59s308062usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=844615
-expid=551694433 -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/844615/
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 551694433.96216 or about 2018:177:08:27:08 UT
Found 1239 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 129 sources in
srclist catalog. Found 57 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 4 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 18.32 mag. Found 99 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 12% of the
Genie image region. The Genie image is INCOMPLETE with 20138 null pixels.
Found no Genie image background information. The closest srclist source has ra=
243.5757 dec= 14.7612 mag=18.36 sep=15.26". The closest Genie source has ra=
243.5534 dec= 14.7482 mag=19.10 sep=84.81".
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?
551694433 334 U srclist found no candidates.
551694433 334 U image found no candidates.
List afterglow candidates for other finding charts.
551694221 122 WHITE srclist found no candidates.
551694221 122 WHITE 243.57551 14.75707 20.71/20.9 1.9 image Yes
551694964 865 WHITE srclist found no candidates.
551694964 865 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 14.75692
GRB_ERROR: 5
GRB_RA: 243.57604
IMAGE_START_TIME: 08:27:08
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT