image overlap message for exposure 3 of trigger 814305
uvot_overlap.pl vrs. 2010-12-20b fem started at 180315d03h21m30s430414usUT
The observation of trigger 814305 started 2018-03-14T22:38:19.5
Examining file ./814305_g882_uvot_sky_image.fits
The exposure ID is 542759899
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (297.8975,23.6230) 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 1.732 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 6.74 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 0.599 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 814305
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180315d03h21m57s391114usUT
Observation start time is 2018-03-14T22:38:19.5
Examining file ./814305_g882_uvot_catalog_image.fits
The exposure ID is 542759899
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 44 detected source(s) for 814305_g882
Aspect correction adds -0.00038 degrees (-0.090 sec of time = -1.24 arc sec) to RA
Aspect correction adds -0.00056 degrees (-2.02 arcsec) to Dec
Total aspect correction is 2.37 arcsec
Star catalogs centered at 297.8975 , 23.6253 with radius 2.69 arc min.
n_usno: 423 n_gsc: 550
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 11.07022
RA DEC Mag Color
bright star 0: 297.91705 (19:51:40.09) 23.66289 (+23:39:46.4) 11.07 USNO-V
bright star 1: 297.93396 (19:51:44.15) 23.65223 (+23:39:08.0) 11.34 USNO-V
Mean distance difference (CAT_DELTA) for 46 matched entries is 0.587" for 814305_g882
Mean and std. dev of mag. difference (MAG_DELTA) are 1.194 and 0.701 for 814305_g882
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 814305_g882.
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.
0 sources matched bright stars.
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 NO acceptable entries.
Unidentified entry closest to XRT position is no. 45:
ra=297.92676 dec= 23.62770 +/- 0.6" mag=18.44+/-0.15 dist=132.9 REFID=21 flag=0
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:
Matched source ra=297.88649 (19:51:32.76) dec=23.62515 (+23:37:30.6) +/- 0.6" mag=18.84+/-0.16 dist=4.0 REFID=22 flag=0
There are 97703.859 counts in the bkg source region of 5479.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 17.832 counts/pixel (5-sig UL in 4" is 19.79 mag) for 814305_g882
There are 3865.5586 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 19.328 counts/pixel for 814305_g882
There are 17602.568 counts in the xrt_bkg source region of 981.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 17.943 counts/pixel (5-sig UL in 4" is 19.78 mag) for 814305_g882
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 20.34, 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_542759899_180315d03h21m57s391114usUT_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(297.8975,23.6230,45")
fk5;-circle(297.888674549387,23.621774033889,6")
fk5;-circle(297.890211828555,23.618674467759,6")
fk5;-circle(297.890193473418,23.6164532386718,6")
fk5;-circle(297.886485470506,23.6251541820386,6")
fk5;-circle(297.888820598941,23.6290474620858,6")
fk5;-circle(297.894168913149,23.6315956822207,6")
fk5;-circle(297.884132732008,23.630074254172,6")
fk5;-circle(297.901134186318,23.610212524848,6")
fk5;-circle(297.908110388433,23.6237416649544,6")
fk5;-circle(297.902168107227,23.6355325227989,6")
fk5;-circle(297.909642926777,23.6157642333031,6")
fk5;-circle(297.910267149075,23.6303569967066,6")
Region file: 814305_542759899_180315d03h21m57s391114usUT_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_542759899_180315d03h21m57s391114usUT_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(297.888674549387,23.621774033889,6")
fk5;-circle(297.890211828555,23.618674467759,6")
fk5;-circle(297.890193473418,23.6164532386718,6")
fk5;-circle(297.888820598941,23.6290474620858,6")
fk5;-circle(297.884132732008,23.630074254172,6")
image paragraph message for exposure 3 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, srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
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 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 150 seconds with the White filter
starting 861 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 180315d03h22m00s493050usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=814305
-expid=542759899 -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 542759899.48964 or about 2018:073:22:38:14 UT
Found 4891 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 49% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. 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 44 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.34 mag. Found 550 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 52% of the Genie image region.
Genie image analysis:
Found 97703.9 counts in the large background region of 5479.0 pixels or a rate
of 17.832 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 19.79 mag. for a
4-arcsec aperture.
Found 3865.6 counts in the XRT position region of 200.0 pixels or a rate of
19.328 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 1.846 +/- 0.452 (1-sigma) cps or
19.11 mag and a range from 18.88 to 19.42 mag. The 3-sigma UL at the XRT
position is 3.202 cps or 18.52 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.70 mag. The closest
srclist source has ra= 297.8903 dec= 23.6165 mag=16.76 sep=29.61".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 297.8865 dec= 23.6252 mag=18.84 sep=3.99". The closest Genie
source has ra= 297.8865 dec= 23.6252 mag=18.84 sep=3.99".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 861 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 19:51:32.76 = 297.88649
DEC(J2000) = +23:37:30.5 = 23.62515
with a 90%-confidence error radius of about 0.64 arc sec. This position is 3.99
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.84 with a 1-sigma error of about 0.16. No correction has been made for the
large, but uncertain, extinction expected.
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?
542759899 861 WHITE srclist found no candidates.
542759899 861 WHITE 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.
542759345 307 U srclist found no candidates.
542759345 307 U image found no candidates.
------- Tokens for Quick GCN -------