image overlap message for exposure 1 of trigger 873186
uvot_overlap.pl vrs. 2010-12-20b fem started at 181123d08h58m37s890684usUT
The observation of trigger 873186 started 2018-11-23T05:34:48.5
Examining file ./873186_g104_uvot_sky_image.fits
The exposure ID is 564644088
The exposure time is 149.857 (seconds)
The filter is WHITE.
*** Warning -- found 17145 null pixels in the image.
The uvot region is centered at (184.3503,14.5863) with a roll angle of 121.9
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 (184.3480,14.5890) with a radius of 3.000 arc min
This is 0.212 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 (184.3669,14.5979) with a radius of 0.030 arc min
This is 1.188 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 873186
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181123d08h58m47s864738usUT
Observation start time is 2018-11-23T05:34:48.5
Examining file ./873186_g104_uvot_catalog_image.fits
The exposure ID is 564644088
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 873186_g104
Aspect correction adds 0.00070 degrees (0.168 sec of time = 2.44 arc sec) to RA
Aspect correction adds -0.00115 degrees (-4.16 arcsec) to Dec
Total aspect correction is 4.82 arcsec
Star catalogs centered at 184.3762 , 14.5772 with radius 2.00 arc min.
n_usno: 14 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 1 matched entries is 0.108" for 873186_g104
Mean and std. dev of mag. difference (MAG_DELTA) are 1.097 and 0.000 for 873186_g104
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 873186_g104.
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=184.3480 (12:17:23.52) DEC=14.5890 (+14:35:20.4)
XRT distances are from RA=184.3669 (12:17:28.05) DEC=14.5979 (+14:35:52.4)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 16104.049 counts in the bkg source region of 891.00000 pixels.
Rate in bkg region from 0 to 45 arcsec is 18.074 counts/pixel (5-sig UL in 4" is 19.78 mag) for 873186_g104
There are 3584.2754 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 18.102 counts/pixel for 873186_g104
XRT source is too far (71.229022344758") from center -- do not compute local background.
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 20.33, 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: 873186_564644088_181123d08h58m47s864738usUT_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(184.3503,14.5863,45")
Region file: 873186_564644088_181123d08h58m47s864738usUT_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(184.36687,14.59789,8")
image paragraph message for exposure 1 of trigger 873186
------ Start for Possible Stand-alone Circular ----
In response to GRB181123 (Swift/BAT trigger 873186) at 05:33:03 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 83 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
0.03.
------- notes for trigger 873186 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181123d08h58m54s117554usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=873186
-expid=564644088 -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/873186/
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 564644088.53834 or about 2018:327:05:34:43 UT
Found 137 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 20 sources in
srclist catalog. Found 0 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 1 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 20.33 mag. Found 10 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 1% of the
Genie image region. The Genie image is INCOMPLETE with 17145 null pixels.
Genie image analysis:
Found 16104.0 counts in the large background region of 891.0 pixels or a rate
of 18.074 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 19.78 mag. for a
4-arcsec aperture.
Found 3584.3 counts in the XRT position region of 198.0 pixels or a rate of
18.103 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 0.038 +/- 0.441 (1-sigma) cps or
23.34 mag and a range from 20.58 to 99.99 mag. The 3-sigma UL at the XRT
position is 1.361 cps or 19.45 mag. The closest srclist source has ra= 184.3692
dec= 14.6095 mag=19.53 sep=42.41". The closest Genie source has ra= 184.3761
dec= 14.5772 mag=16.26 sep=81.35".
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?
564644088 82 WHITE srclist found no candidates.
564644088 82 WHITE image found no candidates.
List afterglow candidates for other finding charts.
564644301 295 U srclist found no candidates.
564644301 295 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 14.59789
GRB_ERROR: 5
GRB_RA: 184.36687
IMAGE_START_TIME: 05:34:43
MAGNITUDE: 19.4
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT