image overlap message for exposure 3 of trigger 868312
uvot_overlap.pl vrs. 2010-12-20b fem started at 181022d17h53m41s041591usUT
The observation of trigger 868312 started 2018-10-22T17:44:59.2
Examining file 868312_g885_uvot_sky_image.fits
The exposure ID is 561923099
The exposure time is 149.868 (seconds)
The filter is U.
The uvot region is centered at (56.8000,-29.3323) with a roll angle of 140.5
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 (56.7950,-29.3320) with a radius of 3.000 arc min
This is 0.262 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 (56.7920,-29.3796) with a radius of 0.035 arc min
This is 2.867 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 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 3 of trigger 868312
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181022d17h53m42s097821usUT
Observation start time is 2018-10-22T17:44:59.2
Examining file 868312_g885_uvot_catalog_image.fits
The exposure ID is 561923099
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is U
There are 1 detected source(s) for 868312_g885
Aspect correction adds 0.00082 degrees (0.197 sec of time = 2.57 arc sec) to RA
Aspect correction adds 0.00151 degrees ( 5.45 arcsec) to Dec
Total aspect correction is 6.03 arcsec
Star catalogs centered at 56.7819 , -29.3343 with radius 2.00 arc min.
n_usno: 41 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 1 matched entries is 0.402" for 868312_g885
Mean and std. dev of mag. difference (MAG_DELTA) are 1.101 and 0.000 for 868312_g885
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 868312_g885.
Acceptable entries have no ID, XRT distances < 5.25", 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=56.7950 (03:47:10.80) DEC=-29.3320 (-29:19:55.2)
XRT distances are from RA=56.7920 (03:47:10.08) DEC=-29.3796 (-29:22:46.6)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 16952.457 counts in the bkg source region of 6316.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.684 counts/pixel (5-sig UL in 4" is 19.37 mag) for 868312_g885
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 19.93, XRT distances < 5.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 868312_561923099_181022d17h53m42s097821usUT_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(56.8000,-29.3323,45")
image paragraph message for exposure 3 of trigger 868312
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB181022 (Swift/BAT trigger 868312) at 17:30:13 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the U filter starting
864 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 868312 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181022d17h53m43s246919usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=868312
-expid=561923099 -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/868312/
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 561923099.1886 or about 2018:295:17:44:54 UT
Found 574 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 38 sources in
srclist catalog. Found 15 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 1 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 19.93 mag. Found 37 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region.
Genie image analysis:
Found 16952.5 counts in the large background region of 6316.0 pixels or a rate
of 2.684 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 19.41 mag. for a
4-arcsec aperture. The closest srclist source has ra= 56.7557 dec= -29.3593
mag=17.83 sep=135.53". The closest Genie source has ra= 56.7766 dec= -29.3329
mag=17.04 sep=175.14".
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?
561923099 864 U srclist found no candidates.
561923099 864 U image found no candidates.
List afterglow candidates for other finding charts.
561922332 97 U srclist found no candidates.
561922332 97 U image found no candidates.
561922591 356 ? srclist data are not available.
561922591 356 UVW2 image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -29.37967
GRB_ERROR: 5.25
GRB_RA: 56.79204
IMAGE_START_TIME: 17:44:54
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT