image overlap message for exposure 1 of trigger 020138
uvot_overlap.pl vrs. 2009-10-28 fem started at 100519d09h14m08s157224usUT
The observation of trigger 020138 started 2010-05-18T14:12:51.8
Examining file ./020138_g9555_uvot_sky_image.fits
The exposure ID is 295884771
The exposure time is 149.824 (seconds)
The filter is WHITE.
The uvot region is centered at (304.8026,-24.5601) with a roll angle of 79.2
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 (304.8000,-24.5610) with a radius of 3.000 arc min
This is 0.153 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 (304.7893,-24.5544) with a radius of 0.037 arc min
This is 0.805 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The uvot/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 020138
find_uvot_ag.pl vrs. 2009-07-21 fem started at 100519d09h14m17s668942usUT
Observation start time is 2010-05-18T14:12:51.8
Examining file ./020138_g9555_uvot_catalog_image.fits
The exposure ID is 295884771
The exposure is 149.824 sec.
The bin size is 2 pixels
The filter is WHITE
There are 19 detected source(s) for 020138_g9555
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.87
RA DEC Mag Color
bright star 0: 304.79147 (20:19:09.95) -24.54611 (-24:32:46.0) 11.87 GSC-F
Mean distance difference (CAT_DELTA) for 16 matched entries is 0.495" for 020138_g9555
Mean and std. dev of mag. difference (MAG_DELTA) are 0.644 and 0.687 for 020138_g9555
Found 5 entries without IDs and 1 entries that are acceptable afterglow candidates for 020138_g9555.
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=304.8000 (20:19:12.00) DEC=-24.5610 (-24:33:39.6)
XRT distances are from RA=304.7893 (20:19:09.43) DEC=-24.5544 (-24:33:15.7)
*** WARNING 26 per cent of entries have no IDs.
-----------------
Entry 4 in the list of sources is a candidate afterglow for 020138_g9555 with genie
ra=304.80383 (20:19:12.92) dec=-24.55008 (-24:33:00.3) +/- 0.6" mag=18.73+/-0.15
dist=50.1 REFID=7 major=2.3 minor=1.0 flag=1 (neighbor)
*** The position of this source is inconsistent with the XRT position.
The position is 41.3 arc sec from the BAT position.
Found 1 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
304.8012 -24.5516 10.4 -1 USNO-B1 19.68 19.46 19.56
*** If XRT position is correct, then this is NOT the afterglow
**Reject this candidate because profile_major > 2.0 and profile minor < 1.0
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 72907.938 counts in the bkg source region of 5760.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 12.658 counts/pixel (5-sig UL in 4" is 19.97 mag) for 020138_g9555
There are 2735.7642 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 13.817 counts/pixel for 020138_g9555
There are 11936.829 counts in the xrt_bkg source region of 904.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 13.204 counts/pixel (5-sig UL in 4" is 19.95 mag) for 020138_g9555
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 20.53, 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: 020138_295884771_100519d09h14m17s668942usUT_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(304.8026,-24.5601,45")
fk5;-circle(304.806071058917,-24.555935569746,6")
fk5;-circle(304.798636035987,-24.5534924101802,6")
fk5;-circle(304.788596525367,-24.5590093523386,6")
fk5;-circle(304.79598571227,-24.5505015098175,6")
fk5;-circle(304.803834990152,-24.5500815430383,6")
fk5;-circle(304.792339825397,-24.5505138560819,6")
fk5;-circle(304.811937563008,-24.5502545668757,6")
fk5;-circle(304.81480401384,-24.5523261160446,6")
Region file: 020138_295884771_100519d09h14m17s668942usUT_xrt.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(304.78929,-24.55436,8")
Region file: 020138_295884771_100519d09h14m17s668942usUT_xrt_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(304.78929,-24.55436,25")
fk5;-circle(304.78929,-24.55436,15")
fk5;-circle(304.798636035987,-24.5534924101802,6")
fk5;-circle(304.788596525367,-24.5590093523386,6")
fk5;-circle(304.79598571227,-24.5505015098175,6")
fk5;-circle(304.792339825397,-24.5505138560819,6")
fk5;-circle(304.789260283372,-24.5493190534892,6")
fk5;-circle(304.787551186416,-24.5504734795566,6")
fk5;-circle(304.791589129309,-24.5461942773817,6")
image paragraph message for exposure 1 of trigger 020138
------ Start for Possible Stand-alone Circular ----
In response to GRB100518 (Swift/BAT trigger 020138) at 11:33:35 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 9551 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
100% of the XRT error circle. The typical 3-sigma upper limit has been about
19.6 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 mag. No correction has been made for the expected extinction
corresponding to E(B-V) of 0.07.
------- notes for trigger 020138 ------
uvot_gcn_auto.pl vrs. 2010-03-17 fem at 100519d09h14m59s923463usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=020138
-expid=295884771 -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/020138/
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 295884771.81664 or about 2010:138:14:12:49 UT
Found 519 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 120 sources in
srclist catalog. Found 13 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 19 source(s) in Genie image catalog. Found 5 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.53 mag. Found 98 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
9% of the Genie image region.
Genie image analysis:
Found 72907.9 counts in the large background region of 5760.0 pixels or a rate
of 12.658 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 19.97 mag. for a
4-arcsec aperture.
Found 2735.8 counts in the XRT position region of 198.0 pixels or a rate of
13.817 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.809 +/- 0.383 (1-sigma) cps or
20.01 mag and a range from 19.59 to 20.71 mag. The 3-sigma UL at the XRT
position is 1.959 cps or 19.05 mag. The closest srclist source has ra= 304.7889
dec= -24.5590 mag=18.92 sep=16.80". The closest Genie source has ra= 304.7876
dec= -24.5505 mag=18.19 sep=15.11".
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?
295884771 9550 WHITE srclist found no candidates.
295884771 9550 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -24.55436
GRB_ERROR: 10
GRB_RA: 304.78929
IMAGE_START_TIME: 14:12:49
MAGNITUDE: 19.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT