image overlap message for exposure 2 of trigger 848932
uvot_overlap.pl vrs. 2010-12-20b fem started at 180721d03h46m59s064812usUT
The observation of trigger 848932 started 2018-07-20T22:29:31.2
Examining file ./848932_g333_uvot_sky_image.fits
The exposure ID is 553818571
The exposure time is 113.304 (seconds)
The filter is U.
*** Warning -- found 21168 null pixels in the image.
The uvot region is centered at (265.6193,-26.5866) with a roll angle of 266.6
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 (265.6230,-26.5840) with a radius of 3.000 arc min
This is 0.250 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 at most 6.60 sq. arc min or 0.23 of the BAT error circle
The XRT error circle is centered at (265.6356,-26.6290) with a radius of 0.032 arc min
This is 2.693 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 848932
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180721d03h47m10s641709usUT
Observation start time is 2018-07-20T22:29:31.2
Examining file ./848932_g333_uvot_sources_image.fits
The exposure ID is 553818571
The exposure is 113.304 sec.
The bin size is 2 pixels
The filter is U
There are 3 detected source(s) for 848932_g333
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 265.6108 , -26.6028 with radius 2.02 arc min.
n_usno: 613 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
Bright star catalog has no entries brighter than 12 mag
Found 3 entries without IDs and 3 entries that are acceptable afterglow candidates for 848932_g333.
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=265.6230 (17:42:29.52) DEC=-26.5840 (-26:35:02.4)
XRT distances are from RA=265.6356 (17:42:32.54) DEC=-26.6290 (-26:37:44.5)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 848932_g333 with genie
ra=265.62717 (17:42:30.52) dec=-26.61152 (-26:36:41.5) +/- 0.8" mag=17.79+/-0.17
dist=68.6 REFID=1 major=0.9 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 100.0 arc sec from the BAT position.
This source is near the edge of image (0.892)
Found 21 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 12 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
265.6219 -26.6102 17.5 -1 USNO-B1 99.99 19.28 99.99 *
265.6241 -26.6083 15.3 -1 USNO-B1 99.99 18.88 99.99 *
265.6248 -26.6071 17.8 -1 USNO-B1 99.99 19.09 99.99 *
265.6220 -26.6120 16.7 -1 USNO-B1 99.99 19.75 99.99 *
265.6254 -26.6072 16.7 -1 USNO-B1 99.99 18.71 99.99 *
265.6241 -26.6109 10.0 -1 USNO-B1 99.99 25.13 99.99 *
265.6264 -26.6073 15.5 -1 USNO-B1 99.99 18.22 99.99 *
265.6267 -26.6067 17.4 -1 USNO-B1 99.99 46.07 99.99 *
265.6263 -26.6097 7.2 -1 USNO-B1 99.99 18.22 99.99 *
265.6258 -26.6117 4.4 -1 USNO-B1 99.99 16.47 99.99 *
265.6263 -26.6112 2.9 -1 USNO-B1 17.80 14.57 16.00 *
265.6247 -26.6140 12.1 -1 USNO-B1 99.99 19.86 99.99 *
265.6288 -26.6089 10.8 -1 USNO-B1 99.99 19.57 99.99 *
265.6249 -26.6153 15.6 -1 USNO-B1 99.99 16.84 99.99 *
265.6295 -26.6120 7.7 -1 USNO-B1 99.99 18.00 99.99 *
265.6279 -26.6144 10.6 -1 USNO-B1 99.99 18.98 99.99 *
265.6314 -26.6087 17.0 -1 USNO-B1 99.99 18.40 99.99 *
265.6274 -26.6151 13.1 -1 USNO-B1 99.99 18.74 99.99 *
265.6307 -26.6124 11.9 -1 USNO-B1 99.99 17.64 99.99 *
265.6293 -26.6159 17.0 -1 USNO-B1 99.99 19.06 99.99 *
265.6324 -26.6129 17.5 -1 USNO-B1 99.99 18.64 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 20.25" or brighter than 12 mag
-----------------
Entry 1 in the list of sources is a candidate afterglow for 848932_g333 with genie
ra=265.59445 (17:42:22.67) dec=-26.59404 (-26:35:38.5) +/- 0.8" mag=18.00+/-0.17
dist=182.8 REFID=2 major=1.1 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 98.8 arc sec from the BAT position.
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
265.5991 -26.5948 15.1 -1 USNO-B1 99.99 20.20 99.99
265.5974 -26.5958 11.3 -1 USNO-B1 99.99 17.84 99.99 *
265.6001 -26.5921 19.6 -1 USNO-B1 99.99 18.83 99.99
265.5955 -26.5977 13.6 -1 USNO-B1 99.99 19.08 99.99
265.5954 -26.5962 8.3 -1 USNO-B1 19.88 16.42 17.96 *
265.5942 -26.5936 1.8 -1 USNO-B1 16.95 14.18 15.41 *
265.5937 -26.5913 10.2 -1 USNO-B1 17.14 18.14 17.70 *
265.5937 -26.5897 15.7 -1 USNO-B1 19.44 17.34 18.27
265.5889 -26.5930 18.4 -1 USNO-B1 99.99 22.34 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 848932_g333 with genie
ra=265.61093 (17:42:26.62) dec=-26.60727 (-26:36:26.2) +/- 1.0" mag=19.22+/-0.25
dist=111.5 REFID=3 major=0.8 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 92.3 arc sec from the BAT position.
This source is near the edge of image (0.996)
Found 17 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
265.6118 -26.6033 14.4 -1 USNO-B1 99.99 16.96 99.99 *
265.6129 -26.6029 16.9 -1 USNO-B1 99.99 16.46 99.99 *
265.6081 -26.6040 14.8 -1 USNO-B1 18.79 15.60 17.01 *
265.6078 -26.6026 19.6 -1 USNO-B1 99.99 16.12 99.99 *
265.6101 -26.6065 3.7 -1 USNO-B1 18.66 15.86 17.10 *
265.6073 -26.6068 11.8 -1 USNO-B1 99.99 17.35 99.99 *
265.6059 -26.6059 16.8 -1 USNO-B1 99.99 18.40 99.99 *
265.6116 -26.6082 4.1 -1 USNO-B1 99.99 18.72 99.99 *
265.6091 -26.6083 7.0 -1 USNO-B1 99.99 17.05 99.99 *
265.6158 -26.6067 15.9 -1 USNO-B1 99.99 19.42 99.99 *
265.6162 -26.6065 17.3 -1 USNO-B1 99.99 18.86 99.99 *
265.6161 -26.6084 17.3 -1 USNO-B1 99.99 17.97 99.99 *
265.6076 -26.6097 13.8 -1 USNO-B1 99.99 20.62 99.99 *
265.6095 -26.6107 13.3 -1 USNO-B1 99.99 22.65 99.99 *
265.6051 -26.6091 19.9 -1 USNO-B1 99.99 18.25 99.99 *
265.6121 -26.6108 13.4 -1 USNO-B1 19.65 17.31 18.35 *
265.6069 -26.6115 19.9 -1 USNO-B1 99.99 20.51 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 20.25" or brighter than 12 mag
Found 7 entries in star catalog(s) within 20" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
265.6338 -26.6238 19.9 -1 USNO-B1 99.99 18.87 99.99
265.6331 -26.6261 13.1 -1 USNO-B1 99.99 19.06 99.99
265.6330 -26.6264 12.6 -1 USNO-B1 99.99 20.17 99.99
265.6362 -26.6244 17.0 -1 USNO-B1 99.99 34.97 99.99
265.6297 -26.6299 19.2 -1 USNO-B1 99.99 17.17 99.99
265.6340 -26.6275 7.6 -1 USNO-B1 99.99 50.59 99.99
265.6301 -26.6313 19.5 -1 USNO-B1 16.59 14.29 15.31
The closest star is 7.59" away.
List UVOT sources within 20" of the XRT position:
There are 0.0000000 counts in the bkg source region of 0.0000000 pixels.
Do not compute counts in XRT region because position is too far from center.
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 17.89, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Results are questionable because aspect solution FAILED.
Region file: 848932_553818571_180721d03h47m10s641709usUT_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(265.6193,-26.5866,45")
image paragraph message for exposure 2 of trigger 848932
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no aspect solution
SRCLIST PROBLEM: no srclist afterglow info
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 GRB180720 (Swift/BAT trigger 848932) at 22:23:57 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 113 seconds with the U filter starting
312 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image processing FAILED
because of no aspect solution. Results from the list of sources generated
on-board are not available at this time. No correction has been made for the
large, but uncertain, extinction expected.
------- notes for trigger 848932 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180721d03h47m12s556190usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=848932
-expid=553818571 -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/848932/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Large extinction of 6.57 found for bat position. Unreliable extinction found
for xrt position. XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 553818571.21052 or about 2018:201:22:29:26 UT
No information found about the number of stars in the star catalog for srclist
region.
THERE IS NO ASPECT SOLUTION for the image data.
Found 3 source(s) in Genie image catalog. Found 3 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 17.89 mag. Found 609 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 103% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region. The Genie image is INCOMPLETE with 21168 null pixels.
The closest Genie source has ra= 265.6272 dec= -26.6115 mag=17.79 sep=68.60".
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?
553818571 312 U srclist data are not available.
553818571 312 U image found no candidates.
List afterglow candidates for other finding charts.
553818359 100 WHITE srclist found no candidates.
553818359 100 WHITE image found no candidates.
------- Tokens for Quick GCN -------