image overlap message for exposure 2 of trigger 814305
uvot_overlap.pl vrs. 2010-12-20b fem started at 180315d03h21m29s965848usUT
The observation of trigger 814305 started 2018-03-14T22:29:05.5
Examining file ./814305_g328_uvot_sky_image.fits
The exposure ID is 542759345
The exposure time is 249.946 (seconds)
The filter is U.
The uvot region is centered at (297.8970,23.6234) with a roll angle of 106.9
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 (297.8660,23.6230) with a radius of 3.000 arc min
This is 1.705 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 6.79 sq. arc min or 0.24 of the BAT error circle
The XRT error circle is centered at (297.8867,23.6241) with a radius of 0.025 arc min
This is 0.569 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 2 of trigger 814305
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180315d03h21m45s295633usUT
Observation start time is 2018-03-14T22:29:05.5
Examining file ./814305_g328_uvot_catalog_image.fits
The exposure ID is 542759345
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 14 detected source(s) for 814305_g328
Aspect correction adds 0.00014 degrees (0.034 sec of time = 0.47 arc sec) to RA
Aspect correction adds -0.00033 degrees (-1.20 arcsec) to Dec
Total aspect correction is 1.29 arcsec
Star catalogs centered at 297.8934 , 23.6226 with radius 2.48 arc min.
n_usno: 378 n_gsc: 487
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 14 matched entries is 0.783" for 814305_g328
Mean and std. dev of mag. difference (MAG_DELTA) are 2.476 and 0.787 for 814305_g328
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 814305_g328.
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=297.8660 (19:51:27.84) DEC=23.6230 (+23:37:22.8)
XRT distances are from RA=297.8867 (19:51:32.80) DEC=23.6241 (+23:37:26.6)
Found 2 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
297.8864 23.6251 4.0 -1 USNO-B1 18.30 16.73 17.43
297.8864 23.6251 3.7 -1 GSC2.3 17.12 18.58 17.93
The closest star is 3.68" away.
List UVOT sources within 10" of the XRT position:
There are 25094.285 counts in the bkg source region of 6057.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 4.143 counts/pixel (5-sig UL in 4" is 19.69 mag) for 814305_g328
There are 894.54126 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 4.450 counts/pixel for 814305_g328
There are 5203.6782 counts in the xrt_bkg source region of 1239.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 4.200 counts/pixel (5-sig UL in 4" is 19.69 mag) for 814305_g328
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 20.25, 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: 814305_542759345_180315d03h21m45s295633usUT_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(297.8970,23.6234,45")
fk5;-circle(297.89019960732,23.6164656036671,6")
fk5;-circle(297.894229970676,23.6316076332727,6")
fk5;-circle(297.90215809678,23.6354945518296,6")
Region file: 814305_542759345_180315d03h21m45s295633usUT_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(297.88667,23.62406,8")
Region file: 814305_542759345_180315d03h21m45s295633usUT_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(297.88667,23.62406,25")
fk5;-circle(297.88667,23.62406,15")
fk5;-circle(297.89019960732,23.6164656036671,6")
image paragraph message for exposure 2 of trigger 814305
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars
SRCLIST PROBLEM: high density of stars
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB180314 (Swift/BAT trigger 814305) at 22:23:36 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
307 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. Because of the density of catalogued stars, further analysis
is required to report an upper limit for any afterglow in the sub-image. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. Because of the density of catalogued stars, further analysis is
required to report an upper limit for any afterglow in the region. No
correction has been made for the large, but uncertain, extinction expected.
------- notes for trigger 814305 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180315d03h21m48s048592usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=814305
-expid=542759345 -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/814305/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Large extinction of 7.09 found for bat position. Unreliable extinction found
for xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 542759345.50468 or about 2018:073:22:29:00 UT
Found 2797 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 50% of the srclist region. Found 111 sources in
srclist catalog. Found 44 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 14 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 20.25 mag. Found 487 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
54% of the Genie image region.
Genie image analysis:
Found 25094.3 counts in the large background region of 6057.0 pixels or a rate
of 4.143 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 19.73 mag. for a
4-arcsec aperture.
Found 894.5 counts in the XRT position region of 201.0 pixels or a rate of
4.450 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.201 +/- 0.128 (1-sigma) cps or
20.12 mag and a range from 19.58 to 21.22 mag. The 3-sigma UL at the XRT
position is 0.587 cps or 18.96 mag. The closest srclist source has ra= 297.8904
dec= 23.6165 mag=17.53 sep=29.96". The closest Genie source has ra= 297.8902
dec= 23.6165 mag=16.81 sep=29.72".
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?
542759345 307 U srclist found no candidates.
542759345 307 U image found no candidates.
List afterglow candidates for other finding charts.
542759131 93 WHITE srclist found no candidates.
542759131 93 WHITE image found no candidates.
542759899 861 WHITE srclist found no candidates.
542759899 861 WHITE image found no candidates.
------- Tokens for Quick GCN -------