image overlap message for exposure 3 of trigger 851829
uvot_overlap.pl vrs. 2010-12-20b fem started at 180805d12h11m11s714782usUT
The observation of trigger 851829 started 2018-08-05T09:19:50.1
Examining file ./851829_g900_uvot_sky_image.fits
The exposure ID is 555153590
The exposure time is 149.857 (seconds)
The filter is WHITE.
*** Warning -- found 23012 null pixels in the image.
The uvot region is centered at (167.5256,-45.3280) with a roll angle of 326.9
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 (167.5300,-45.3310) with a radius of 3.000 arc min
This is 0.258 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 at most 1.74 sq. arc min or 0.06 of the BAT error circle
The XRT error circle is centered at (167.5662,-45.3322) with a radius of 0.042 arc min
This is 1.732 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 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 851829
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180805d12h11m27s008325usUT
Observation start time is 2018-08-05T09:19:50.1
Examining file ./851829_g900_uvot_catalog_image.fits
The exposure ID is 555153590
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 851829_g900
Aspect correction adds 0.00019 degrees (0.044 sec of time = 0.47 arc sec) to RA
Aspect correction adds -0.00029 degrees (-1.04 arcsec) to Dec
Total aspect correction is 1.14 arcsec
Star catalogs centered at 167.5124 , -45.3357 with radius 2.00 arc min.
n_usno: 88 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 0.382" for 851829_g900
Mean and std. dev of mag. difference (MAG_DELTA) are -4.409 and 0.000 for 851829_g900
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 851829_g900.
Acceptable entries have no ID, XRT distances < 6.25", 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=167.5300 (11:10:07.20) DEC=-45.3310 (-45:19:51.6)
XRT distances are from RA=167.5662 (11:10:15.90) DEC=-45.3322 (-45:19:56.0)
*** WARNING 66 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 851829_g900 with genie
ra=167.49706 (11:09:59.30) dec=-45.33094 (-45:19:51.4) +/- 1.1" mag=13.66+/-0.35
dist=175.2 REFID=1 major=30.8 minor=4.5 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 83.4 arc sec from the BAT position.
This source is near the edge of image (0.938)
Found 3 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
167.5012 -45.3272 17.0 -1 USNO-B1 19.49 18.79 19.10
167.4999 -45.3258 19.9 -1 USNO-B1 20.03 19.59 19.79
167.4931 -45.3333 13.1 -1 USNO-B1 21.37 19.45 20.31
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 30.8
-----------------
Entry 1 in the list of sources is a candidate afterglow for 851829_g900 with genie
ra=167.49853 (11:09:59.65) dec=-45.34033 (-45:20:25.2) +/- 1.1" mag=13.66+/-0.35
dist=173.8 REFID=2 major=7.2 minor=4.5 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 86.4 arc sec from the BAT position.
This source is near the edge of image (0.926)
Found 2 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
167.5005 -45.3393 6.3 -1 USNO-B1 18.45 17.41 17.87
167.4953 -45.3443 16.5 -1 USNO-B1 20.74 19.48 20.04
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 7.2
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 0.0000000 counts in the bkg source region of 0.0000000 pixels.
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 19.42, XRT distances < 6.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 851829_555153590_180805d12h11m27s008325usUT_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(167.5256,-45.3280,45")
image paragraph message for exposure 3 of trigger 851829
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: incomplete image, no overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB180805 (Swift/BAT trigger 851829) at 09:04:49 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 879 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 mag. No correction has been made for the expected
extinction corresponding to E(B-V) of 0.19.
------- notes for trigger 851829 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180805d12h11m29s111833usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=851829
-expid=555153590 -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/851829/
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 555153590.062 or about 2018:217:09:19:45 UT
Found 2146 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 17% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 6 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 3 source(s) in Genie image catalog. Found 2 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.42 mag. Found 84 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 14% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region. The Genie image is INCOMPLETE with 23012 null pixels.
Found no Genie image background information. The number of srclist sources
filled the available telemetry. The weakest source detected was 18.83 mag. The
closest srclist source has ra= 167.5754 dec= -45.3256 mag=18.35 sep=33.31". The
closest Genie source has ra= 167.4985 dec= -45.3403 mag=13.66 sep=173.82".
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?
555153590 879 WHITE srclist found no candidates.
555153590 879 WHITE image found no candidates.
List afterglow candidates for other finding charts.
555152800 89 WHITE srclist found no candidates.
555152800 89 WHITE image found no candidates.
555153012 301 U srclist found no candidates.
555153012 301 U image found no candidates.
------- Tokens for Quick GCN -------