image overlap message for exposure 3 of trigger 870201
uvot_overlap.pl vrs. 2010-12-20b fem started at 181103d10h00m07s803463usUT
The observation of trigger 870201 started 2018-11-03T04:37:27.6
Examining file ./870201_g896_uvot_sky_image.fits
The exposure ID is 562912647
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (197.1143,52.2271) with a roll angle of 158.2
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 (197.1090,52.2300) with a radius of 3.000 arc min
This is 0.262 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 (197.1159,52.2259) with a radius of 0.027 arc min
This is 0.093 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 870201
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181103d10h01m04s473853usUT
Observation start time is 2018-11-03T04:37:27.6
Examining file ./870201_g896_uvot_catalog_image.fits
The exposure ID is 562912647
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 2 detected source(s) for 870201_g896
Aspect correction adds 0.00007 degrees (0.016 sec of time = 0.15 arc sec) to RA
Aspect correction adds -0.00026 degrees (-0.95 arcsec) to Dec
Total aspect correction is 0.96 arcsec
Star catalogs centered at 197.1067 , 52.2394 with radius 2.00 arc min.
n_usno: 23 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.321" for 870201_g896
Mean and std. dev of mag. difference (MAG_DELTA) are -0.119 and 0.186 for 870201_g896
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 870201_g896.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
Magnitude criteria will be applied later.
BAT distances are from RA=197.1090 (13:08:26.16) DEC=52.2300 (+52:13:48.0)
XRT distances are from RA=197.1159 (13:08:27.81) DEC=52.2259 (+52:13:33.1)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 79993.703 counts in the bkg source region of 6208.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 12.886 counts/pixel (5-sig UL in 4" is 19.96 mag) for 870201_g896
There are 2713.9849 counts in the xrt source region of 204.00000 pixels.
Rate in xrt region with 8 arcsec radius is 13.304 counts/pixel for 870201_g896
There are 16216.786 counts in the xrt_bkg source region of 1253.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 12.942 counts/pixel (5-sig UL in 4" is 19.96 mag) for 870201_g896
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 20.52, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 870201_562912647_181103d10h01m04s473853usUT_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(197.1143,52.2271,45")
fk5;-circle(197.130853676414,52.2321471703113,6")
Region file: 870201_562912647_181103d10h01m04s473853usUT_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(197.11588,52.22586,8")
Region file: 870201_562912647_181103d10h01m04s473853usUT_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(197.11588,52.22586,25")
fk5;-circle(197.11588,52.22586,15")
image paragraph message for exposure 3 of trigger 870201
------ Start for Possible Stand-alone Circular ----
In response to GRB181103 (Swift/BAT trigger 870201) at 04:22:30 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 875 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
0.01.
------- notes for trigger 870201 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181103d10h01m25s358511usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=870201
-expid=562912647 -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/870201/
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 562912647.557 or about 2018:307:04:37:22 UT
Found 619 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 42 sources in
srclist catalog. Found 9 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 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 20.52 mag. Found 19 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 79993.7 counts in the large background region of 6208.0 pixels or a rate
of 12.886 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 19.96 mag. for a
4-arcsec aperture.
Found 2714.0 counts in the XRT position region of 204.0 pixels or a rate of
13.304 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.492 +/- 0.374 (1-sigma) cps or
20.55 mag and a range from 19.94 to 22.10 mag. The 3-sigma UL at the XRT
position is 1.613 cps or 19.26 mag. The closest srclist source has ra= 197.1377
dec= 52.2276 mag=20.17 sep=48.52". The closest Genie source has ra= 197.1309
dec= 52.2321 mag=20.61 sep=40.03".
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?
562912647 874 WHITE srclist found no candidates.
562912647 874 WHITE image found no candidates.
List afterglow candidates for other finding charts.
562911865 92 WHITE srclist found no candidates.
562911865 92 WHITE image found no candidates.
562912023 250 U srclist found no candidates.
562912023 250 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 52.22586
GRB_ERROR: 5
GRB_RA: 197.11588
IMAGE_START_TIME: 04:37:22
MAGNITUDE: 19.3
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT