image overlap message for exposure 2 of trigger 831810
uvot_overlap.pl vrs. 2010-12-20b fem started at 180511d19h49m19s740819usUT
The observation of trigger 831810 started 2018-05-10T19:30:05.0
Examining file ./831810_g330_uvot_sky_image.fits
The exposure ID is 547673405
The exposure time is 12.630 (seconds)
The filter is U.
The uvot region is centered at (276.3361,-31.9059) with a roll angle of 95.9
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 (276.3354,-31.9169) with a radius of 1.000 arc min
This is 0.662 arc min from the center of the uvot region
The area of the BAT error circle is 3.14 sq. arc min
The UVOT/BAT overlap is 2.94 sq. arc min or 0.94 of the BAT error circle
The XRT error circle is centered at (276.3314,-31.9081) with a radius of 0.060 arc min
This is 0.272 arc min from the center of the uvot region
The area of the XRT error circle is 0.011 sq. arc min
The UVOT/XRT overlap is 0.011 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 831810
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180511d19h49m25s992424usUT
Observation start time is 2018-05-10T19:30:05.0
Examining file ./831810_g330_uvot_catalog_image.fits
The exposure ID is 547673405
The exposure is 12.630 sec.
The bin size is 2 pixels
The filter is U
There are 12 detected source(s) for 831810_g330
Aspect correction adds 0.00149 degrees (0.358 sec of time = 4.56 arc sec) to RA
Aspect correction adds 0.00087 degrees ( 3.13 arcsec) to Dec
Total aspect correction is 5.53 arcsec
Star catalogs centered at 276.3300 , -31.9030 with radius 2.27 arc min.
n_usno: 1005 n_gsc: 382
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 11.682
RA DEC Mag Color
bright star 0: 276.34451 (18:25:22.68) -31.87095 (-31:52:15.4) 11.99 USNO-V
bright star 1: 276.35013 (18:25:24.03) -31.89800 (-31:53:52.8) 11.68 GSC-V
Mean distance difference (CAT_DELTA) for 11 matched entries is 0.841" for 831810_g330
Mean and std. dev of mag. difference (MAG_DELTA) are 1.630 and 0.542 for 831810_g330
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 831810_g330.
Acceptable entries have no ID, XRT distances < 9", 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=276.3354 (18:25:20.50) DEC=-31.9169 (-31:55:00.9)
XRT distances are from RA=276.3314 (18:25:19.54) DEC=-31.9081 (-31:54:29.1)
-----------------
Entry 7 in the list of sources is a candidate afterglow for 831810_g330 with genie
ra=276.31549 (18:25:15.72) dec=-31.91916 (-31:55:09.0) +/- 0.8" mag=16.80+/-0.23
dist=62.9 REFID=1 major=1.4 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 30.4 arc sec from the BAT position.
This source is near the edge of image (0.950)
Found 31 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
276.3201 -31.9154 19.3 -1 USNO-B1 26.67 18.52 22.14
276.3183 -31.9151 17.1 -1 USNO-B1 17.80 19.85 18.94
276.3205 -31.9171 16.9 -1 USNO-B1 16.85 17.89 17.43
276.3207 -31.9177 16.8 -1 USNO-B1 17.19 17.69 17.47
276.3170 -31.9166 10.3 -1 USNO-B1 17.71 20.15 19.07
276.3175 -31.9187 6.4 -1 USNO-B1 17.80 16.37 17.01
276.3132 -31.9159 13.7 -1 USNO-B1 17.69 19.05 18.45
276.3140 -31.9176 7.2 -1 USNO-B1 18.64 19.59 19.17
276.3164 -31.9194 3.0 -1 USNO-B1 15.94 11.83 13.65 *
276.3163 -31.9202 4.3 -1 USNO-B1 15.46 99.99 99.99 *
276.3157 -31.9203 4.1 -1 USNO-B1 14.05 12.08 12.96 *
276.3102 -31.9166 18.6 -1 USNO-B1 17.58 18.73 18.22
276.3100 -31.9170 18.5 -1 USNO-B1 99.99 18.64 99.99
276.3096 -31.9174 19.1 -1 USNO-B1 16.28 16.66 16.49
276.3152 -31.9220 10.3 -1 USNO-B1 99.99 15.88 99.99
276.3146 -31.9217 9.5 -1 USNO-B1 13.56 12.09 12.74
276.3154 -31.9224 11.6 -1 USNO-B1 17.49 17.27 17.37
276.3110 -31.9203 14.2 -1 USNO-B1 17.37 18.38 17.93
276.3102 -31.9198 16.4 -1 USNO-B1 18.86 17.83 18.29
276.3106 -31.9210 16.2 -1 USNO-B1 18.26 99.99 99.99
276.3126 -31.9228 15.7 -1 USNO-B1 15.75 13.71 14.61
276.3130 -31.9239 18.8 -1 USNO-B1 15.97 17.16 16.63
276.3206 -31.9179 16.4 -1 GSC2.3 99.99 99.99 99.99
276.3174 -31.9185 6.4 -1 GSC2.3 16.74 99.99 99.99
276.3175 -31.9205 7.8 -1 GSC2.3 14.74 99.99 15.34
276.3208 -31.9222 19.6 -1 GSC2.3 16.93 99.99 99.99
276.3151 -31.9199 2.9 -1 GSC2.3 13.68 99.99 14.39 *
276.3097 -31.9176 18.5 -1 GSC2.3 17.18 99.99 99.99
276.3154 -31.9224 11.6 -1 GSC2.3 16.88 99.99 17.26
276.3109 -31.9202 14.4 -1 GSC2.3 99.99 99.99 99.99
276.3124 -31.9227 15.9 -1 GSC2.3 14.19 99.99 14.85
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 9 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
276.3334 -31.9069 7.4 -1 USNO-B1 17.34 16.59 16.92
276.3338 -31.9069 8.5 -1 USNO-B1 15.89 99.99 99.99
276.3343 -31.9069 9.7 -1 USNO-B1 99.99 18.75 99.99
276.3308 -31.9087 2.9 -1 USNO-B1 16.45 17.34 16.95
276.3326 -31.9087 4.2 -1 USNO-B1 99.99 18.81 99.99
276.3335 -31.9089 6.9 -1 USNO-B1 17.60 17.88 17.76
276.3343 -31.9089 9.1 -1 USNO-B1 17.84 13.58 15.47
276.3331 -31.9068 6.9 -1 GSC2.3 16.91 99.99 17.38
276.3307 -31.9086 3.1 -1 GSC2.3 17.18 99.99 99.99
The closest star is 2.91" away.
List UVOT sources within 10" of the XRT position:
There are 5017.4229 counts in the bkg source region of 5776.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 0.869 counts/pixel (5-sig UL in 4" is 17.30 mag) for 831810_g330
There are 194.39691 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 0.972 counts/pixel for 831810_g330
There are 1053.4170 counts in the xrt_bkg source region of 1233.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 0.854 counts/pixel (5-sig UL in 4" is 17.31 mag) for 831810_g330
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 17.85, XRT distances < 9",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 831810_547673405_180511d19h49m25s992424usUT_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(276.3361,-31.9059,45")
fk5;-circle(276.334608794773,-31.9093785787877,6")
fk5;-circle(276.327240758607,-31.897975374051,6")
fk5;-circle(276.336422450852,-31.9174719291896,6")
fk5;-circle(276.345223511532,-31.9021109707754,6")
fk5;-circle(276.347630774688,-31.9054207388686,6")
fk5;-circle(276.349507772907,-31.8978761160459,6")
Region file: 831810_547673405_180511d19h49m25s992424usUT_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(276.33142,-31.90808,8")
Region file: 831810_547673405_180511d19h49m25s992424usUT_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(276.33142,-31.90808,25")
fk5;-circle(276.33142,-31.90808,15")
fk5;-circle(276.334608794773,-31.9093785787877,6")
image paragraph message for exposure 2 of trigger 831810
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.
------ Start for Possible Stand-alone Circular ----
In response to GRB180510 (Swift/BAT trigger 831810) at 19:24:34 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 13 seconds with the U filter starting
309 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.
Results 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 0.26.
------- notes for trigger 831810 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180511d19h49m27s157750usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=831810
-expid=547673405 -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/831810/
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 547673405.01616 or about 2018:130:19:30:00 UT
No information found about the number of stars in the star catalog for srclist
region.
Found 12 source(s) in Genie image catalog. 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 17.85 mag. Found 1001 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
134% of the Genie image region.
Genie image analysis:
Found 5017.4 counts in the large background region of 5776.0 pixels or a rate
of 0.869 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 17.37 mag. for a
4-arcsec aperture.
Found 194.4 counts in the XRT position region of 200.0 pixels or a rate of
0.972 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 1.810 +/- 1.146 (1-sigma) cps or
17.74 mag and a range from 17.20 to 18.83 mag. The 3-sigma UL at the XRT
position is 5.249 cps or 16.58 mag. The closest Genie source has ra= 276.3346
dec= -31.9094 mag=16.58 sep=10.81".
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?
547673405 309 U srclist data are not available.
547673405 309 U image found no candidates.
List afterglow candidates for other finding charts.
547673192 96 ? srclist data are not available.
547673192 96 WHITE image found no candidates.
------- Tokens for Quick GCN -------