image overlap message for exposure 1 of trigger 810300
uvot_overlap.pl vrs. 2010-12-20b fem started at 180216d07h21m04s721133usUT
The observation of trigger 810300 started 2018-02-16T06:56:14.4
Examining file ./810300_g4730_uvot_sky_image.fits
The exposure ID is 540456974
The exposure time is 43.200 (seconds)
The filter is WHITE.
The uvot region is centered at (254.5541,-42.7073) with a roll angle of 89.3
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 (254.5450,-42.7090) with a radius of 3.000 arc min
This is 0.414 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 (254.5524,-42.6988) with a radius of 0.063 arc min
This is 0.516 arc min from the center of the uvot region
The area of the XRT error circle is 0.013 sq. arc min
The UVOT/XRT overlap is 0.013 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 810300
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180216d07h21m08s094996usUT
Observation start time is 2018-02-16T06:56:14.4
Examining file ./810300_g4730_uvot_catalog_image.fits
The exposure ID is 540456974
The exposure is 43.200 sec.
The bin size is 2 pixels
The filter is WHITE
There are 23 detected source(s) for 810300_g4730
Aspect correction adds -0.00088 degrees (-0.211 sec of time = -2.33 arc sec) to RA
Aspect correction adds 0.00032 degrees ( 1.14 arcsec) to Dec
Total aspect correction is 2.59 arcsec
Star catalogs centered at 254.5556 , -42.7026 with radius 2.77 arc min.
n_usno: 304 n_gsc: 829
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 9.51
RA DEC Mag Color
bright star 0: 254.60022 (16:58:24.05) -42.72814 (-42:43:41.3) 10.34 USNO-V
bright star 1: 254.60379 (16:58:24.91) -42.72785 (-42:43:40.3) 9.51 USNO-R
Mean distance difference (CAT_DELTA) for 23 matched entries is 0.705" for 810300_g4730
Mean and std. dev of mag. difference (MAG_DELTA) are 1.742 and 0.653 for 810300_g4730
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 810300_g4730.
Acceptable entries have no ID, XRT distances < 9.5", 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=254.5450 (16:58:10.80) DEC=-42.7090 (-42:42:32.4)
XRT distances are from RA=254.5524 (16:58:12.58) DEC=-42.6988 (-42:41:55.7)
-----------------
Entry 11 in the list of sources is a candidate afterglow for 810300_g4730 with genie
ra=254.53432 (16:58:08.24) dec=-42.72365 (-42:43:25.1) +/- 0.7" mag=18.93+/-0.19
dist=101.4 REFID=1 major=1.1 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 59.8 arc sec from the BAT position.
This source is near the edge of image (0.963)
Found 15 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
254.5402 -42.7205 19.2 -1 USNO-B1 15.79 14.18 14.89
254.5358 -42.7195 15.6 -1 USNO-B1 18.52 15.08 16.61
254.5333 -42.7218 7.0 -1 USNO-B1 99.99 16.77 99.99
254.5360 -42.7234 4.6 -1 USNO-B1 99.99 18.42 99.99 *
254.5323 -42.7213 9.9 -1 USNO-B1 15.91 14.21 14.96
254.5352 -42.7234 2.4 -1 USNO-B1 18.54 19.36 19.00 *
254.5339 -42.7233 1.6 -1 USNO-B1 17.98 15.37 16.53 *
254.5318 -42.7221 8.6 -1 USNO-B1 99.99 16.34 99.99
254.5300 -42.7272 17.1 -1 USNO-B1 20.61 17.95 19.13
254.5401 -42.7205 19.0 -1 GSC2.3 14.36 15.64 14.53
254.5354 -42.7195 15.1 -1 GSC2.3 15.84 18.68 16.85
254.5310 -42.7190 19.0 -1 GSC2.3 19.68 21.70 99.99
254.5322 -42.7214 9.8 -1 GSC2.3 14.41 15.94 14.81
254.5342 -42.7237 0.3 -1 GSC2.3 16.50 18.11 17.72 *
254.5299 -42.7272 17.5 -1 GSC2.3 18.45 20.37 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
-----------------
Entry 20 in the list of sources is a candidate afterglow for 810300_g4730 with genie
ra=254.57617 (16:58:18.28) dec=-42.69163 (-42:41:29.9) +/- 0.6" mag=17.50+/-0.15
dist=68.0 REFID=5 major=0.9 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 103.5 arc sec from the BAT position.
This source is near the edge of image (0.950)
Found 9 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
254.5768 -42.6920 2.0 -1 USNO-B1 99.99 12.73 99.99 *
254.5789 -42.6941 11.5 -1 USNO-B1 17.81 14.86 16.17
254.5774 -42.6921 3.7 -1 USNO-B1 17.87 13.89 15.66 *
254.5790 -42.6939 11.2 -1 USNO-B1 18.52 16.41 17.34
254.5784 -42.6926 6.8 -1 USNO-B1 99.99 16.37 99.99
254.5759 -42.6917 0.6 -1 GSC2.3 14.82 17.85 15.71 *
254.5789 -42.6941 11.6 -1 GSC2.3 16.79 19.24 99.99
254.5786 -42.6925 7.1 -1 GSC2.3 16.24 18.41 17.07
254.5800 -42.6871 19.1 -1 GSC2.3 18.31 20.07 99.99
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 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 31404.348 counts in the bkg source region of 5797.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.417 counts/pixel (5-sig UL in 4" is 19.08 mag) for 810300_g4730
There are 1079.6195 counts in the xrt source region of 196.00000 pixels.
Rate in xrt region with 8 arcsec radius is 5.508 counts/pixel for 810300_g4730
There are 5472.6934 counts in the xrt_bkg source region of 995.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 5.500 counts/pixel (5-sig UL in 4" is 19.07 mag) for 810300_g4730
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 19.64, XRT distances < 9.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 810300_540456974_180216d07h21m08s094996usUT_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(254.5541,-42.7073,45")
fk5;-circle(254.550279129089,-42.714848734362,6")
fk5;-circle(254.549146401171,-42.70260884417,6")
fk5;-circle(254.536924581289,-42.7031815436776,6")
fk5;-circle(254.559585239962,-42.7040814923035,6")
fk5;-circle(254.547890145801,-42.6954739232756,6")
fk5;-circle(254.561159718014,-42.7010137259081,6")
Region file: 810300_540456974_180216d07h21m08s094996usUT_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(254.55242,-42.69881,8")
Region file: 810300_540456974_180216d07h21m08s094996usUT_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(254.55242,-42.69881,25")
fk5;-circle(254.55242,-42.69881,15")
fk5;-circle(254.549146401171,-42.70260884417,6")
fk5;-circle(254.559585239962,-42.7040814923035,6")
fk5;-circle(254.547890145801,-42.6954739232756,6")
fk5;-circle(254.561159718014,-42.7010137259081,6")
fk5;-circle(254.544114647863,-42.6934168734542,6")
image paragraph message for exposure 1 of trigger 810300
------ Start for Possible Stand-alone Circular ----
In response to GRB180216 (Swift/BAT trigger 810300) at 05:37:23 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 43 seconds with the White filter
starting 4710 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 extinction.
------- notes for trigger 810300 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180216d07h21m17s927864usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=810300
-expid=540456974 -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/810300/
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 540456974.41948 or about 2018:047:06:56:09 UT
Found 1191 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 25% of the srclist region. Found 115 sources in
srclist catalog. Found 21 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.54 mag.
Found 23 source(s) in Genie image catalog. 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 19.64 mag. Found 300 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
27% of the Genie image region.
Genie image analysis:
Found 31404.3 counts in the large background region of 5797.0 pixels or a rate
of 5.417 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 19.08 mag. for a
4-arcsec aperture.
Found 1079.6 counts in the XRT position region of 196.0 pixels or a rate of
5.508 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.036 +/- 0.836 (1-sigma) cps or
23.38 mag and a range from 19.93 to 99.99 mag. The 3-sigma UL at the XRT
position is 2.544 cps or 18.77 mag. The closest srclist source has ra= 254.5492
dec= -42.7026 mag=17.07 sep=16.19". The closest Genie source has ra= 254.5491
dec= -42.7026 mag=14.89 sep=16.19".
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?
540456974 4710 WHITE srclist found no candidates.
540456974 4710 WHITE image found no candidates.
List afterglow candidates for other finding charts.
540458197 5933 WHITE srclist found no candidates.
540458197 5933 ? image data are not available.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -42.69881
GRB_ERROR: 9.5
GRB_RA: 254.55242
IMAGE_START_TIME: 06:56:09
MAGNITUDE: 18.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT