image overlap message for exposure 2 of trigger 882809
uvot_overlap.pl vrs. 2010-12-20b fem started at 190109d14h24m38s258388usUT
The observation of trigger 882809 started 2019-01-09T12:01:34.3
Examining file ./882809_g324_uvot_sky_image.fits
The exposure ID is 568728094
The exposure time is 249.946 (seconds)
The filter is U.
The uvot region is centered at (55.5858,63.5777) 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 0.245 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 2.769 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 2 of trigger 882809
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190109d14h24m56s579713usUT
Observation start time is 2019-01-09T12:01:34.3
Examining file ./882809_g324_uvot_catalog_image.fits
The exposure ID is 568728094
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 10 detected source(s) for 882809_g324
Aspect correction adds -0.00153 degrees (-0.366 sec of time = -2.44 arc sec) to RA
Aspect correction adds -0.00002 degrees (-0.08 arcsec) to Dec
Total aspect correction is 2.44 arcsec
Star catalogs centered at 55.5944 , 63.5781 with radius 2.25 arc min.
n_usno: 176 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 11 matched entries is 0.533" for 882809_g324
Mean and std. dev of mag. difference (MAG_DELTA) are 1.375 and 0.537 for 882809_g324
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 882809_g324.
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)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 15721.206 counts in the bkg source region of 6066.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.592 counts/pixel (5-sig UL in 4" is 19.95 mag) for 882809_g324
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 20.50, 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_568728094_190109d14h24m56s579713usUT_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(55.5858,63.5777,45")
fk5;-circle(55.5857993000383,63.5767297461021,6")
fk5;-circle(55.5924013825734,63.5878533534775,6")
fk5;-circle(55.6100421722808,63.5697740263272,6")
image paragraph message for exposure 2 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 250 seconds with the U filter starting
302 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 18.0 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 190109d14h25m02s204307usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=882809
-expid=568728094 -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 568728094.31508 or about 2019:009:12:01:29 UT
Found 2170 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 66 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 10 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 20.50 mag. Found 172 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 15721.2 counts in the large background region of 6066.0 pixels or a rate
of 2.592 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 19.99 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 19.06 mag. The closest srclist
source has ra= 55.4858 dec= 63.5860 mag=17.85 sep=21.82". The closest Genie
source has ra= 55.5620 dec= 63.5895 mag=18.76 sep=120.01".
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?
568728094 302 U srclist found no candidates.
568728094 302 U 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.
568728649 857 WHITE srclist found no candidates.
568728649 857 WHITE image found no candidates.
------- Tokens for Quick GCN -------