image afterglow message for exposure 1 of trigger 020117
find_uvot_ag.pl vrs. 2009-07-21 fem started at 091028d17h11m27s168110usUT
Observation start time is 2009-10-28T17:05:57.5
Examining file 20117_g356_uvot_catalog_image.fits
The exposure ID is 278442357
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 020117
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 6 matched entries is 0.288" for 020117
Mean and std. dev of mag. difference (MAG_DELTA) are 0.618 and 0.458 for 020117
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 020117.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", and are > ~(80 - 10*(mag-6))" from any bright star.
Magnitude criteria will be applied later.
BAT distances are from RA=133.7040 (08:54:48.96) DEC=20.1080 (+20:06:28.8)
XRT distances are as reported in catalog file.
There are 1.0578134E+05 counts in the bkg source region of 6201.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 17.059 counts/pixel (5-sig UL in 4" is 19.81 mag) for 020117
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.80, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 020117_278442357_091028d17h11m27s168110usUT_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(133.7303,20.1141,45")
fk5;-circle(133.726855044026,20.1038176752409,6")
image paragraph message for exposure 1 of trigger 020117
IMAGE PROBLEM: overlap undefined
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 GRB091028 (Swift/BAT trigger 020117) at 17:00:00 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 overlap of the sub-image and the
XRT error circle is uncertain. The 8'x8' region for the list of sources
generated on-board covers 100% of the BAT 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 0.03.
------- notes for trigger 020117 ------
uvot_gcn_auto.pl vrs. 2009-06-29 fem at 091028d20h03m55s808278usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=020117
-expid=278442863 -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/020117/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 278442863.86846 or about 2009:301:17:14:21 UT
Found 409 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 69 sources in
srclist catalog. Found 7 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
Found 5 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
20.36 mag. Found 46 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 4% of the Genie image region.
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 133.7037 dec= 20.1086 mag=15.65 sep=0.94". The closest Genie
source has ra= 133.7037 dec= 20.1086 mag=15.65 sep=0.94".
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?
278442863 857 WHITE srclist found no candidates.
278442863 857 WHITE image found no candidates.
List afterglow candidates for other finding charts.
278442357 351 WHITE srclist found no candidates.
278442357 351 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 20.10800
GRB_ERROR: 200
GRB_RA: 133.70400
IMAGE_START_TIME: 17:14:21
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT