srclist overlap message for exposure 2 of trigger 176918
uvot_overlap.pl vrs. 2006-11-27 fem started at 061207d20h17m40sUT
The observation of trigger 176918 started 2006-01-11T20:20:34.0
Examining file ./176918_o290_v8_uvot_sky_srclist.fits.1
The exposure ID is 158703634
The exposure time is undefined.
The filter is B.
The uvot region is centered at (286.4266,70.3748) with a roll angle of 173.6
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (286.3370,70.3600) with a radius of 3.000 arc min
This is 2.011 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 26.67 sq. arc min or 0.94 of the BAT error circle
The XRT error circle is centered at (286.4266,70.3770) with a radius of 0.097 arc min
This is 0.134 arc min from the center of the uvot region
The area of the XRT error circle is 0.029 sq. arc min
The uvot/XRT overlap is 0.029 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 176918
find_uvot_ag.pl vrs. 2006-09-28 fem started at 061207d20h17m41sUT
Observation start time is 2006-01-11T20:20:34.0
Examining file ./176918_o290_v8_uvot_catalog_srclist.fits.1
The exposure ID is 158703634
The filter is B
There are 54 detected source(s) for 176918_o290_v8
*** WARNING -- access to gsc2.2 catalog failed.
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for matched entries is 0.426" for 176918_o290_v8
Mean and std. dev of mag. difference (MAG_DELTA) are 0.634 and 0.281 for 176918_o290_v8
Found 2 entries without IDs and 0 entries that are acceptable afterglow candidates for 176918_o290_v8.
Acceptable entries have no ID, XRT distances < 8", and are > ~(80 - 10*(mag-6))" from any bright star.
Magnitude criteria will be applied later.
BAT distances are from RA=286.3370 (19:05:20.88) DEC=70.3600 (+70:21:36.0)
XRT distances are from RA=286.4266 (19:05:42.38) DEC=70.3770 (+70:22:37.2)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 11:
ra=286.5439 dec= 70.3918 mag=19.3 dist=151.5 REFID=53
There are 0 star(s) in the USNOB1 catalog within 10" of the XRT position.
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, mag between 9.01 and 18.00, XRT distances < 8",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 2 of trigger 176918
------ Start for Possible Stand-alone Circular ----
In response to GRB060111 (Swift/BAT trigger 176918) at 20:15:43.24 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 200 seconds with the B filter starting
290 seconds after the BAT trigger. No afterglow candidate has been found in the
initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error
circle. The typical 3-sigma upper limit has been about 18.5 mag. 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 of about 0.5 magnitudes.
------- notes for trigger 176918 ------
uvot_gcn_auto.pl vrs. 2006-11-20 fem at 061207d20h17m42sUT
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/176918/
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 158703634.02838 or 2006:011:20:20:33 UT
Access to GSC star catalog FAILED. This increases the odds of a FALSE afterglow
detection.
Found 272 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 54 sources in
srclist catalog. Found 2 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.00 mag.
Found 2 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 20.26 mag. Found 23 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 3% of the
Genie image region.
Genie image analysis:
Found 66028.3 counts in the large background region of 6087.0 pixels or a rate
of 10.847 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 19.71 mag. for a
4-arcsec aperture.
Found 2248.1 counts in the XRT position region of 201.0 pixels or a rate of
11.185 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.283 +/- 0.257 (1-sigma) cps or
20.49 mag and a range from 19.79 to 23.09 mag. The 3-sigma UL at the XRT
position is 1.055 cps or 19.06 mag.
There are 0 catalogued stars within 10 arc sec. of XRT position.
All AG candidates sorted by magnitude for the current finding chart.
(V/White SRCLIST mags < 17.5/18.5 are reliable. Mag > 18.5/19.5 are not.
Others are uncertain.)
(V/White Genie image mags < 18.0/19.0 are reliable. Mag > 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?
158703634 291 B srclist found no candidates.
158703634 291 B image found no candidates.
List afterglow candidates for other finding charts.
No unique and reliable afterglow was found.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: b
GRB_DEC: +70.3770
GRB_ERROR: 8
GRB_RA: 286.4266
IMAGE_START_TIME: 20:20:33
MAGNITUDE: 19.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT