image overlap message for exposure 1 of trigger 020147
uvot_overlap.pl vrs. 2009-10-28 fem started at 100910d03h35m30s293051usUT
The observation of trigger 020147 started 2010-09-09T12:19:48.0
Examining file ./020147_g11694_uvot_sky_image.fits
The exposure ID is 305727588
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (73.9811,54.6492) with a roll angle of 83.8
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 (73.9505,54.6544) with a radius of 2.000 arc min
This is 1.105 arc min from the center of the uvot region
The area of the BAT error circle is 12.57 sq. arc min
The uvot/BAT overlap is 5.56 sq. arc min or 0.44 of the BAT error circle
The XRT error circle is centered at (73.9476,54.6597) with a radius of 0.090 arc min
This is 1.320 arc min from the center of the uvot region
The area of the XRT error circle is 0.025 sq. arc min
The uvot/XRT overlap is 0.017 sq. arc min or 0.68 of the XRT error circle
image afterglow message for exposure 1 of trigger 020147
find_uvot_ag.pl vrs. 2010-08-31 fem started at 100910d03h35m40s990521usUT
Observation start time is 2010-09-09T12:19:48.0
Examining file ./020147_g11694_uvot_catalog_image.fits
The exposure ID is 305727588
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 30 detected source(s) for 020147_g11694
Star catalogs centered at 73.9816 , 54.6448 with radius 2.61 arc min.
n_usno: 216 n_gsc: 4
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 31 matched entries is 0.419" for 020147_g11694
Mean and std. dev of mag. difference (MAG_DELTA) are 1.285 and 0.411 for 020147_g11694
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 020147_g11694.
Acceptable entries have no ID, XRT distances < 10", and are > ~(80 - 10*(mag-6))" from any bright star.
Magnitude criteria will be applied later.
BAT distances are from RA=73.9505 (04:55:48.12) DEC=54.6544 (+54:39:15.8)
XRT distances are from RA=73.9476 (04:55:47.42) DEC=54.6597 (+54:39:34.8)
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
73.9509 54.6594 6.9 9 USNO-B1 19.11 19.27 19.19
The closest star is 6.88" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=73.95098 (04:55:48.24) dec=54.65926 (+54:39:33.3) +/- 0.8" mag=20.69+/-0.23 dist=7.2 REFID=9
There are 57834.004 counts in the bkg source region of 5602.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.324 counts/pixel (5-sig UL in 4" is 20.08 mag) for 020147_g11694
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 20.64, XRT distances < 10",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 020147_305727588_100910d03h35m40s990521usUT_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(73.9811,54.6492,45")
fk5;-circle(73.9749993268379,54.6466611634878,6")
fk5;-circle(73.9637724570298,54.6456874519685,6")
fk5;-circle(73.9878965150708,54.6488096548755,6")
fk5;-circle(73.9707031140607,54.6396867478903,6")
fk5;-circle(73.9888363696684,54.65651020907,6")
fk5;-circle(73.991427289817,54.6405012788882,6")
fk5;-circle(73.982676301929,54.6620077809013,6")
image paragraph message for exposure 1 of trigger 020147
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: srclist filled telemetry buffer
See notes for more details.
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB100909 (Swift/BAT trigger 020147) at 09:04:00 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 11687 seconds after the INTEGRAL trigger. No credible afterglow
candidate has been found in the initial data products. The 2.7'x2.7' sub-image
covers 68% of the XRT error circle. The typical 3-sigma upper limit has been
about 19.6 mag. 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. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.51.
------- notes for trigger 020147 ------
uvot_gcn_auto.pl vrs. 2010-09-01 fem at 100910d03h36m22s711745usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=020147
-expid=305727588 -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/020147/
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 305727588.02668 or about 2010:252:12:19:46 UT
Found 1132 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 8 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 30 source(s) in Genie image catalog. 1 source(s) are within 10" of the
xrt position. 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
20.64 mag. Found 212 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 21% of the Genie image region.
Genie image analysis:
Found 57834.0 counts in the large background region of 5602.0 pixels or a rate
of 10.324 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 20.08 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 19.43 mag. The closest srclist
source has ra= 73.9550 dec= 54.6619 mag=18.28 sep=17.28".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 73.9510 dec= 54.6593 mag=20.69 sep=7.23". The closest Genie
source has ra= 73.9510 dec= 54.6593 mag=20.69 sep=7.23".
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 11687 seconds after the INTEGRAL trigger. There is a candidate
afterglow in the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 04:55:48.24 = 73.95098
DEC(J2000) = +54:39:33.3 = 54.65926
with a 90%-confidence error radius of about 0.81 arc sec. The estimated
magnitude is 20.69 with a 1-sigma error of about 0.23. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.51.
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?
305727588 11687 WHITE srclist found no candidates.
305727588 11687 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------