image overlap message for exposure 1 of trigger 823014
uvot_overlap.pl vrs. 2010-12-20b fem started at 180407d04h31m06s660392usUT
The observation of trigger 823014 started 2018-04-07T04:26:17.3
Examining file 823014_g1258_uvot_sky_image.fits
The exposure ID is 544767977
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (209.9380,48.6585) with a roll angle of 16.7
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 (209.9380,48.6540) with a radius of 3.000 arc min
This is 0.270 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 823014
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180407d04h31m28s923128usUT
Observation start time is 2018-04-07T04:26:17.3
Examining file 823014_g1258_uvot_catalog_image.fits
The exposure ID is 544767977
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 5 detected source(s) for 823014_g1258
Aspect correction adds 0.00037 degrees (0.089 sec of time = 0.88 arc sec) to RA
Aspect correction adds 0.00062 degrees ( 2.24 arcsec) to Dec
Total aspect correction is 2.40 arcsec
Star catalogs centered at 209.9328 , 48.6585 with radius 2.52 arc min.
n_usno: 55 n_gsc: 44
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 6 matched entries is 0.483" for 823014_g1258
Mean and std. dev of mag. difference (MAG_DELTA) are 0.601 and 0.674 for 823014_g1258
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 823014_g1258.
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=209.9380 (13:59:45.12) DEC=48.6540 (+48:39:14.4)
XRT distances are as reported in catalog file.
There are 36766.027 counts in the bkg source region of 6208.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.922 counts/pixel (5-sig UL in 4" is 20.38 mag) for 823014_g1258
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.38, 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: 823014_544767977_180407d04h31m28s923128usUT_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(209.9380,48.6585,45")
fk5;-circle(209.925075253881,48.6594483461584,6")
image paragraph message for exposure 1 of trigger 823014
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB180407 (Swift/BAT trigger 823014) at 04:05:18 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 1238 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 0.02.
------- notes for trigger 823014 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180407d04h31m31s392639usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=823014
-expid=544767977 -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/823014/
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 544767977.27296 or about 2018:097:04:26:12 UT
Found 281 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 37 sources in
srclist catalog. Found 13 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 5 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 20.38 mag. Found 51 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.
Genie image analysis:
Found 36766.0 counts in the large background region of 6208.0 pixels or a rate
of 5.922 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 20.38 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?
544767977 1237 WHITE srclist found no candidates.
544767977 1237 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 48.65400
GRB_ERROR: 200
GRB_RA: 209.93800
IMAGE_START_TIME: 04:26:12
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT