image overlap message for exposure 1 of trigger 872470
uvot_overlap.pl vrs. 2010-12-20b fem started at 181118d17h57m48s531077usUT
The observation of trigger 872470 started 2018-11-18T17:51:50.1
Examining file 872470_g1095_uvot_sky_image.fits
The exposure ID is 564256310
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (299.2658,-15.6662) with a roll angle of 256.1
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 (299.2700,-15.6650) with a radius of 3.000 arc min
This is 0.252 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
Could not find the location of an XRT error circle
image afterglow message for exposure 1 of trigger 872470
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181118d17h57m52s759182usUT
Observation start time is 2018-11-18T17:51:50.1
Examining file 872470_g1095_uvot_catalog_image.fits
The exposure ID is 564256310
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 16 detected source(s) for 872470_g1095
Aspect correction adds 0.00000 degrees (0.001 sec of time = 0.02 arc sec) to RA
Aspect correction adds 0.00041 degrees ( 1.49 arcsec) to Dec
Total aspect correction is 1.49 arcsec
Star catalogs centered at 299.2677 , -15.6664 with radius 2.67 arc min.
n_usno: 205 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 17 matched entries is 0.564" for 872470_g1095
Mean and std. dev of mag. difference (MAG_DELTA) are 0.713 and 0.355 for 872470_g1095
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 872470_g1095.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", 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=299.2700 (19:57:04.80) DEC=-15.6650 (-15:39:54.0)
XRT distances are as reported in catalog file.
There are 1.4631997E+05 counts in the bkg source region of 6159.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 23.757 counts/pixel (5-sig UL in 4" is 19.63 mag) for 872470_g1095
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.62, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 872470_564256310_181118d17h57m52s759182usUT_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(299.2658,-15.6662,45")
fk5;-circle(299.269166855381,-15.6589978708304,6")
fk5;-circle(299.278041238742,-15.6609287527697,6")
image paragraph message for exposure 1 of trigger 872470
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB181118 (Swift/BAT trigger 872470) at 17:33:34 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 1073 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 25%
of the BAT error circle. The typical 3-sigma upper limit has been about 19.6
mag. The 8'x8' region for the list of sources generated on-board covers 100% of
the BAT error circle. The list of sources is typically complete to about 18
mag. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.16.
------- notes for trigger 872470 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181118d17h58m10s692259usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=872470
-expid=564256310 -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/872470/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. No XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 564256310.14552 or about 2018:322:17:51:45 UT
Found 1081 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 19% of the srclist region. Found 127 sources in
srclist catalog. Found 6 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
Found 16 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 19.62 mag. Found 201 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
19% of the Genie image region.
Genie image analysis:
Found 146320.0 counts in the large background region of 6159.0 pixels or a rate
of 23.757 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 19.63 mag. for a
4-arcsec aperture.
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?
564256310 1073 WHITE srclist found no candidates.
564256310 1073 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -15.66500
GRB_ERROR: 200
GRB_RA: 299.27000
IMAGE_START_TIME: 17:51:45
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT