image overlap message for exposure 1 of trigger 814259
uvot_overlap.pl vrs. 2010-12-20b fem started at 180314d19h22m27s299242usUT
The observation of trigger 814259 started 2018-03-14T19:14:22.9
Examining file 814259_g170_uvot_sky_image.fits
The exposure ID is 542747662
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (275.0945,7.1885) with a roll angle of 93.6
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 (275.0890,7.1810) with a radius of 3.000 arc min
This is 0.555 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 (275.0898,7.1831) with a radius of 0.082 arc min
This is 0.427 arc min from the center of the uvot region
The area of the XRT error circle is 0.021 sq. arc min
The UVOT/XRT overlap is 0.021 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 814259
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180314d19h22m28s122525usUT
Observation start time is 2018-03-14T19:14:22.9
Examining file 814259_g170_uvot_catalog_image.fits
The exposure ID is 542747662
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 50 detected source(s) for 814259_g170
Aspect correction adds 0.00027 degrees (0.064 sec of time = 0.95 arc sec) to RA
Aspect correction adds 0.00160 degrees ( 5.77 arcsec) to Dec
Total aspect correction is 5.85 arcsec
Star catalogs centered at 275.0915 , 7.1892 with radius 2.62 arc min.
n_usno: 417 n_gsc: 522
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 11.20508
RA DEC Mag Color
bright star 0: 275.09094 (18:20:21.83) 7.21634 (+07:12:58.8) 11.21 USNO-V
bright star 1: 275.05371 (18:20:12.89) 7.17657 (+07:10:35.6) 11.84 GSC-V
Mean distance difference (CAT_DELTA) for 53 matched entries is 0.578" for 814259_g170
Mean and std. dev of mag. difference (MAG_DELTA) are 0.781 and 0.943 for 814259_g170
Found 2 entries without IDs and 1 entries that are acceptable afterglow candidates for 814259_g170.
Acceptable entries have no ID, XRT distances < 12.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=275.0890 (18:20:21.36) DEC= 7.1810 (+07:10:51.6)
XRT distances are from RA=275.0898 (18:20:21.55) DEC= 7.1831 (+07:10:59.2)
-----------------
Entry 31 in the list of sources is a candidate afterglow for 814259_g170 with genie
ra=275.07299 (18:20:17.52) dec=7.17538 (+07:10:31.4) +/- 0.7" mag=19.12+/-0.16
dist=66.2 REFID=45 major=0.7 minor=0.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 60.7 arc sec from the BAT position.
This source is near the edge of image (1.022)
Found 17 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
275.0785 7.1748 19.7 -1 USNO-B1 19.11 17.37 18.14
275.0773 7.1757 15.3 -1 USNO-B1 15.69 13.91 14.70
275.0746 7.1771 8.4 -1 USNO-B1 19.75 18.45 19.02
275.0737 7.1762 3.9 -1 USNO-B1 19.93 18.06 18.89 *
275.0725 7.1763 3.8 -1 USNO-B1 19.27 17.73 18.41 *
275.0725 7.1760 2.8 -1 USNO-B1 17.82 17.38 17.58 *
275.0726 7.1748 2.4 -1 USNO-B1 16.26 14.57 15.32 *
275.0686 7.1774 17.4 -1 USNO-B1 19.46 17.94 18.61
275.0772 7.1757 15.2 -1 GSC2.3 13.45 15.04 13.50
275.0747 7.1770 8.5 -1 GSC2.3 18.40 20.17 18.99
275.0745 7.1768 7.5 -1 GSC2.3 18.29 99.99 99.99
275.0739 7.1763 4.7 -1 GSC2.3 18.77 20.42 99.99 *
275.0753 7.1734 11.0 -1 GSC2.3 99.99 22.00 99.99
275.0704 7.1798 18.5 -1 GSC2.3 20.02 20.41 99.99
275.0726 7.1747 2.7 -1 GSC2.3 14.23 15.48 14.44 *
275.0733 7.1719 12.5 -1 GSC2.3 19.31 20.68 99.99
275.0687 7.1774 17.0 -1 GSC2.3 17.86 19.06 18.19
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
Found 6 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
275.0920 7.1827 8.0 -1 USNO-B1 20.32 18.74 19.44
275.0886 7.1818 6.4 -1 USNO-B1 17.31 15.38 16.24
275.0915 7.1853 9.8 -1 GSC2.3 18.05 18.87 17.17
275.0920 7.1826 8.2 -1 GSC2.3 18.58 20.31 99.99
275.0873 7.1833 8.8 -1 GSC2.3 20.22 21.37 99.99
275.0886 7.1818 6.5 -1 GSC2.3 14.99 16.84 15.25
The closest star is 6.40" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=275.08863 (18:20:21.27) dec=7.18188 (+07:10:54.8) +/- 0.6" mag=16.69+/-0.14 dist=6.1 REFID=35 flag=0
Matched source ra=275.09124 (18:20:21.90) dec=7.18533 (+07:11:07.2) +/- 0.6" mag=13.69+/-0.14 dist=9.5 REFID=27 flag=0
There are 64999.785 counts in the bkg source region of 4414.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 14.726 counts/pixel (5-sig UL in 4" is 19.89 mag) for 814259_g170
There are 5188.9048 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 25.945 counts/pixel for 814259_g170
There are 12817.076 counts in the xrt_bkg source region of 864.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 14.835 counts/pixel (5-sig UL in 4" is 19.89 mag) for 814259_g170
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 20.44, XRT distances < 12.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 814259_542747662_180314d19h22m28s122525usUT_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(275.0945,7.1885,45")
fk5;-circle(275.088625487476,7.18187949783688,6")
fk5;-circle(275.091241598059,7.18532997986956,6")
fk5;-circle(275.095368385141,7.18303181138444,6")
fk5;-circle(275.087760554903,7.18791880315367,6")
fk5;-circle(275.083644761651,7.18411878490382,6")
fk5;-circle(275.085184380872,7.17786952131825,6")
fk5;-circle(275.091342099745,7.19022942156503,6")
fk5;-circle(275.095100431566,7.17627682081584,6")
fk5;-circle(275.097669282431,7.18807970091879,6")
fk5;-circle(275.098982779073,7.18052773653381,6")
fk5;-circle(275.100101935774,7.18477027425072,6")
fk5;-circle(275.087116518598,7.19461550475103,6")
fk5;-circle(275.103138654893,7.18297234887538,6")
fk5;-circle(275.102771487621,7.18737769071452,6")
fk5;-circle(275.102708067025,7.17794551476667,6")
fk5;-circle(275.090084763676,7.19732380663359,6")
fk5;-circle(275.093760177296,7.19701681186198,6")
fk5;-circle(275.104401195139,7.18580190322701,6")
fk5;-circle(275.083581631321,7.19686019812072,6")
fk5;-circle(275.100404629152,7.19581104281341,6")
fk5;-circle(275.105068207994,7.1947791228143,6")
Region file: 814259_542747662_180314d19h22m28s122525usUT_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(275.0898,+7.1831,8")
Region file: 814259_542747662_180314d19h22m28s122525usUT_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(275.0898,+7.1831,25")
fk5;-circle(275.0898,+7.1831,15")
fk5;-circle(275.091241598059,7.18532997986956,6")
fk5;-circle(275.095368385141,7.18303181138444,6")
fk5;-circle(275.087760554903,7.18791880315367,6")
fk5;-circle(275.083644761651,7.18411878490382,6")
fk5;-circle(275.085184380872,7.17786952131825,6")
fk5;-circle(275.091342099745,7.19022942156503,6")
image paragraph message for exposure 1 of trigger 814259
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: no srclist afterglow info
See notes for more details.
2 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 814259) at 19:11:31 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 150 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. Data from the list of sources generated on-board are not available
at this time. No correction has been made for the expected extinction
corresponding to E(B-V) of 0.23.
------- notes for trigger 814259 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180314d19h22m30s151740usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=814259
-expid=542747662 -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/814259/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 542747662.8569 or about 2018:073:19:14:17 UT
No information found about the number of stars in the star catalog for srclist
region.
Found 50 source(s) in Genie image catalog. 2 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.44 mag. Found 509 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 51% of the Genie image region.
Genie image analysis:
Found 64999.8 counts in the large background region of 4414.0 pixels or a rate
of 14.726 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 19.89 mag. for a
4-arcsec aperture.
Found 5188.9 counts in the XRT position region of 200.0 pixels or a rate of
25.944 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 14.813 +/- 0.511 (1-sigma) cps or
16.85 mag and a range from 16.82 to 16.89 mag. The 3-sigma UL at the XRT
position is 16.346 cps or 16.75 mag.
Found 2 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 275.0886 dec= 7.1819 mag=16.69 sep=6.07". The closest Genie
source has ra= 275.0886 dec= 7.1819 mag=16.69 sep=6.07".
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 150 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 18:20:21.27 = 275.08863
DEC(J2000) = +07:10:54.8 = 7.18188
with a 90%-confidence error radius of about 0.61 arc sec. This position is 6.07
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.69 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.23.
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?
542747662 150 ? srclist data are not available.
542747662 150 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------