image overlap message for exposure 2 of trigger 852625
uvot_overlap.pl vrs. 2010-12-20b fem started at 180810d10h26m00s286562usUT
The observation of trigger 852625 started 2018-08-10T10:16:56.2
Examining file 852625_g333_uvot_sky_image.fits
The exposure ID is 555589016
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (144.4343,-42.7625) with a roll angle of 355.2
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 (144.4360,-42.7670) with a radius of 3.000 arc min
This is 0.280 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 2 of trigger 852625
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180810d10h26m01s037456usUT
Observation start time is 2018-08-10T10:16:56.2
Examining file 852625_g333_uvot_catalog_image.fits
The exposure ID is 555589016
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 14 detected source(s) for 852625_g333
Aspect correction adds 0.00072 degrees (0.173 sec of time = 1.90 arc sec) to RA
Aspect correction adds 0.00109 degrees ( 3.94 arcsec) to Dec
Total aspect correction is 4.37 arcsec
Star catalogs centered at 144.4371 , -42.7650 with radius 2.39 arc min.
n_usno: 270 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 11.23186
RA DEC Mag Color
bright star 0: 144.42999 (09:37:43.20) -42.78564 (-42:47:08.3) 11.25 USNO-R
bright star 1: 144.41413 (09:37:39.39) -42.74955 (-42:44:58.4) 11.23 USNO-V
bright star 2: 144.48255 (09:37:55.81) -42.78519 (-42:47:06.7) 11.91 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 15 matched entries is 0.456" for 852625_g333
Mean and std. dev of mag. difference (MAG_DELTA) are 1.528 and 0.639 for 852625_g333
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 852625_g333.
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.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=144.4360 (09:37:44.64) DEC=-42.7670 (-42:46:01.2)
XRT distances are as reported in catalog file.
Found NO acceptable entries.
Unidentified entry closest to BAT position is no. 6:
ra=144.42846 dec=-42.78393 +/- 0.7" mag=18.36+/-0.17 dist=64.1 REFID=1 flag=0
There are 66832.242 counts in the bkg source region of 6005.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 11.129 counts/pixel (5-sig UL in 4" is 19.16 mag) for 852625_g333
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.15, 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: 852625_555589016_180810d10h26m01s037456usUT_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(144.4343,-42.7625,45")
fk5;-circle(144.436286515759,-42.7652548507423,6")
fk5;-circle(144.43658850453,-42.7730909664245,6")
fk5;-circle(144.439984382162,-42.7737946971163,6")
fk5;-circle(144.445616364026,-42.773118239733,6")
fk5;-circle(144.452828205413,-42.7593554482871,6")
image paragraph message for exposure 2 of trigger 852625
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: partial overlap
SRCLIST PROBLEM: no srclist afterglow info
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB180810 (Swift/BAT trigger 852625) at 10:11:22 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
312 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 19.2 mag.
Results from the list of sources generated on-board are not available at this
time. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.52.
------- notes for trigger 852625 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180810d10h26m02s020004usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=852625
-expid=555589016 -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/852625/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 555589016.17568 or about 2018:222:10:16:51 UT
No information found about the number of stars in the star catalog for srclist
region.
Found 14 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.15 mag. Found 266 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
32% of the Genie image region.
Genie image analysis:
Found 66832.2 counts in the large background region of 6005.0 pixels or a rate
of 11.129 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 19.20 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?
555589016 312 U srclist data are not available.
555589016 312 U image found no candidates.
List afterglow candidates for other finding charts.
555588857 153 WHITE 144.39524 -42.80571 18.13/18.7 176.1 srclist Yes
555588857 153 WHITE image found no candidates.
------- Tokens for Quick GCN -------