image overlap message for exposure 3 of trigger 882809
uvot_overlap.pl vrs. 2010-12-20b fem started at 190109d14h24m39s313010usUT
The observation of trigger 882809 started 2019-01-09T12:10:49.6
Examining file ./882809_g879_uvot_sky_image.fits
The exposure ID is 568728649
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (55.5848,63.5786) with a roll angle of 292.2
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 (55.5950,63.5780) with a radius of 3.000 arc min
This is 0.274 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 (55.4873,63.5920) with a radius of 0.030 arc min
This is 2.727 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 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 882809
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190109d14h25m08s473916usUT
Observation start time is 2019-01-09T12:10:49.6
Examining file ./882809_g879_uvot_catalog_image.fits
The exposure ID is 568728649
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 27 detected source(s) for 882809_g879
Aspect correction adds -0.00128 degrees (-0.307 sec of time = -2.05 arc sec) to RA
Aspect correction adds 0.00008 degrees ( 0.31 arcsec) to Dec
Total aspect correction is 2.07 arcsec
Star catalogs centered at 55.5844 , 63.5781 with radius 2.42 arc min.
n_usno: 200 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.88956
RA DEC Mag Color
bright star 0: 55.64073 (03:42:33.77) 63.59154 (+63:35:29.5) 11.89 USNO-V
Mean distance difference (CAT_DELTA) for 29 matched entries is 0.581" for 882809_g879
Mean and std. dev of mag. difference (MAG_DELTA) are 0.907 and 0.409 for 882809_g879
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 882809_g879.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=55.5950 (03:42:22.80) DEC=63.5780 (+63:34:40.8)
XRT distances are from RA=55.4873 (03:41:56.94) DEC=63.5920 (+63:35:31.3)
-----------------
Entry 17 in the list of sources is a candidate afterglow for 882809_g879 with genie
ra=55.62981 (03:42:31.16) dec=63.58803 (+63:35:16.9) +/- 0.7" mag=19.39+/-0.16
dist=228.8 REFID=9 major=1.9 minor=1.2 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 66.4 arc sec from the BAT position.
This source is near the edge of image (0.931)
Found 4 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
55.6259 63.5865 8.3 -1 USNO-B1 20.16 18.61 19.30
55.6264 63.5925 16.9 -1 USNO-B1 19.27 17.86 18.49
55.6341 63.5912 13.4 -1 USNO-B1 20.11 18.20 19.05
55.6407 63.5876 17.5 -1 USNO-B1 19.99 18.22 19.01
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 1.9
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 53152.762 counts in the bkg source region of 5665.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 9.383 counts/pixel (5-sig UL in 4" is 20.13 mag) for 882809_g879
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 20.69, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 882809_568728649_190109d14h25m08s473916usUT_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(55.5848,63.5786,45")
fk5;-circle(55.6019872326219,63.5770186252373,6")
fk5;-circle(55.5945142526452,63.5815994876162,6")
fk5;-circle(55.5859357490293,63.5768467488813,6")
fk5;-circle(55.6137701352844,63.5806756497419,6")
fk5;-circle(55.5737996924869,63.5757234983112,6")
fk5;-circle(55.5927235428336,63.5879600026269,6")
fk5;-circle(55.6067574281706,63.5865893114449,6")
image paragraph message for exposure 3 of trigger 882809
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB190109 (Swift/BAT trigger 882809) at 11:56:09 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 858 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 0.72.
------- notes for trigger 882809 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190109d14h25m14s459470usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=882809
-expid=568728649 -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/882809/
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 568728649.56884 or about 2019:009:12:10:44 UT
Found 2176 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 20% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 22 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 27 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 20.69 mag. Found 196 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
23% of the Genie image region. The XRT position was OUTSIDE the star catalog
search region.
Genie image analysis:
Found 53152.8 counts in the large background region of 5665.0 pixels or a rate
of 9.383 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 20.13 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 19.09 mag. The closest srclist
source has ra= 55.4864 dec= 63.5856 mag=17.55 sep=23.11". The closest Genie
source has ra= 55.5440 dec= 63.5854 mag=21.05 sep=94.00".
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?
568728649 857 WHITE srclist found no candidates.
568728649 857 WHITE image found no candidates.
List afterglow candidates for other finding charts.
568727882 90 WHITE srclist found no candidates.
568727882 90 WHITE image found no candidates.
568728094 302 U srclist found no candidates.
568728094 302 U image found no candidates.
------- Tokens for Quick GCN -------