image overlap message for exposure 1 of trigger 809374
uvot_overlap.pl vrs. 2010-12-20b fem started at 180210d00h30m59s517197usUT
The observation of trigger 809374 started 2018-02-10T00:16:33.4
Examining file ./809374_g437_uvot_sky_image.fits
The exposure ID is 539914593
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (299.7489,35.0340) with a roll angle of 151.3
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 (299.7470,35.0380) with a radius of 3.000 arc min
This is 0.256 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 (299.7140,35.0784) with a radius of 0.142 arc min
This is 3.164 arc min from the center of the uvot region
The area of the XRT error circle is 0.063 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 1 of trigger 809374
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180210d00h31m05s213807usUT
Observation start time is 2018-02-10T00:16:33.4
Examining file ./809374_g437_uvot_catalog_image.fits
The exposure ID is 539914593
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 20 detected source(s) for 809374_g437
Aspect correction adds -0.00080 degrees (-0.191 sec of time = -2.35 arc sec) to RA
Aspect correction adds 0.00036 degrees ( 1.28 arcsec) to Dec
Total aspect correction is 2.67 arcsec
Star catalogs centered at 299.7496 , 35.0379 with radius 2.39 arc min.
n_usno: 181 n_gsc: 287
*** WARNING -- XRT position is outside star catalog search region.
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.76364
RA DEC Mag Color
bright star 0: 299.78774 (19:59:09.06) 35.03084 (+35:01:51.0) 11.76 USNO-V
Mean distance difference (CAT_DELTA) for 21 matched entries is 0.521" for 809374_g437
Mean and std. dev of mag. difference (MAG_DELTA) are 1.630 and 0.549 for 809374_g437
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 809374_g437.
Acceptable entries have no ID, XRT distances < 15", 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=299.7470 (19:58:59.28) DEC=35.0380 (+35:02:16.8)
XRT distances are from RA=299.7140 (19:58:51.37) DEC=35.0784 (+35:04:42.1)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 1.0388621E+05 counts in the bkg source region of 5789.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 17.945 counts/pixel (5-sig UL in 4" is 19.78 mag) for 809374_g437
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 20.34, XRT distances < 15",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 809374_539914593_180210d00h31m05s213807usUT_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(299.7489,35.0340,45")
fk5;-circle(299.747053187538,35.0386964361699,6")
fk5;-circle(299.744098743163,35.0370992411339,6")
fk5;-circle(299.754434563378,35.0335013292625,6")
fk5;-circle(299.758760010791,35.0360407868774,6")
fk5;-circle(299.760541494523,35.0261286829387,6")
fk5;-circle(299.764533849428,35.0297881637329,6")
image paragraph message for exposure 1 of trigger 809374
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.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB180210 (Swift/BAT trigger 809374) at 00:09:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 417 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 coverage of the XRT error circle by the 8'x8' region
for the list of sources generated on-board is uncertain because the large
number of sources filled the available telemetry. The list of sources is
typically complete to about 18 mag. No correction has been made for the large,
but uncertain, extinction expected.
------- notes for trigger 809374 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180210d00h31m07s533630usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=809374
-expid=539914593 -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/809374/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 539914593.44706 or about 2018:041:00:16:28 UT
Found 2076 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 37% of the srclist region. Found 181 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 36 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 20 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 20.34 mag. Found 287 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
34% of the Genie image region. The XRT position was OUTSIDE the star catalog
search region.
Genie image analysis:
Found 103886.2 counts in the large background region of 5789.0 pixels or a rate
of 17.945 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 19.78 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 19.29 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 299.7145 dec= 35.0810 mag=18.98 sep=9.79".
The closest srclist source has ra= 299.7145 dec= 35.0810 mag=18.98 sep=9.79".
The closest Genie source has ra= 299.7242 dec= 35.0463 mag=17.94 sep=119.34".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 417 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 19:58:51.49 = 299.71453
DEC(J2000) = +35:04:51.8 = 35.08105
with a 90%-confidence error radius of about 1.10 arc sec. This position is 9.79
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.98 with a 1-sigma error of about 0.35. No correction has been made for the
large, but uncertain, extinction expected.
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?
539914593 417 WHITE srclist found no candidates.
539914593 417 WHITE image found no candidates.
List afterglow candidates for other finding charts.
539915048 872 WHITE srclist found no candidates.
539915048 872 WHITE image found no candidates.
------- Tokens for Quick GCN -------