image overlap message for exposure 2 of trigger 866783
uvot_overlap.pl vrs. 2010-12-20b fem started at 181013d07h00m19s050765usUT
The observation of trigger 866783 started 2018-10-13T02:44:17.3
Examining file ./866783_g287_uvot_sky_image.fits
The exposure ID is 561091457
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (207.6023,40.1745) with a roll angle of 192.4
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 (207.6010,40.1790) with a radius of 3.000 arc min
This is 0.278 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 (207.6518,40.1082) with a radius of 0.065 arc min
This is 4.578 arc min from the center of the uvot region
The area of the XRT error circle is 0.013 sq. arc min
The UVOT/XRT overlap is 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 866783
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181013d07h00m28s111496usUT
Observation start time is 2018-10-13T02:44:17.3
Examining file ./866783_g287_uvot_sources_image.fits
The exposure ID is 561091457
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 0 detected source(s) for 866783_g287
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 207.6028 , 40.2046 with radius 2.00 arc min.
n_usno: 33 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
Bright star catalog has no entries brighter than 12 mag
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 866783_g287.
Acceptable entries have no ID, XRT distances < 9.75", 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=207.6010 (13:50:24.24) DEC=40.1790 (+40:10:44.4)
XRT distances are from RA=207.6518 (13:50:36.43) DEC=40.1082 (+40:06:29.5)
Found 0 entries in star catalog(s) within 20" of the XRT position.
List UVOT sources within 20" of the XRT position:
There are 44182.215 counts in the bkg source region of 6308.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 7.004 counts/pixel (5-sig UL in 4" is 19.41 mag) for 866783_g287
Do not compute counts in XRT region because position is too far from center.
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 19.96, XRT distances < 9.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Results are questionable because aspect solution FAILED.
Region file: 866783_561091457_181013d07h00m28s111496usUT_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(207.6023,40.1745,45")
image paragraph message for exposure 2 of trigger 866783
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB181013 (Swift/BAT trigger 866783) at 02:39:29 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
265 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 0.01.
------- notes for trigger 866783 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181013d07h00m30s834729usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=866783
-expid=561091457 -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/866783/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 561091457.31688 or about 2018:286:02:44:12 UT
Found 568 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 13 sources in
srclist catalog. Found 2 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 0 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 19.96 mag. Found 29 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region.
Genie image analysis:
Found 44182.2 counts in the large background region of 6308.0 pixels or a rate
of 7.004 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 19.45 mag. for a
4-arcsec aperture. The closest srclist source has ra= 207.6311 dec= 40.0933
mag=15.26 sep=78.17".
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?
561091457 265 U srclist found no candidates.
561091457 265 U image found no candidates.
List afterglow candidates for other finding charts.
561091298 106 WHITE srclist found no candidates.
561091298 106 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 40.10819
GRB_ERROR: 9.75
GRB_RA: 207.65179
IMAGE_START_TIME: 02:44:12
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT