image overlap message for exposure 1 of trigger 868846
uvot_overlap.pl vrs. 2010-12-20b fem started at 181026d03h35m33s133996usUT
The observation of trigger 868846 started 2018-10-26T03:00:11.6
Examining file ./868846_g144_uvot_sky_image.fits
The exposure ID is 562215611
The exposure time is 63.226 (seconds)
The filter is WHITE.
The uvot region is centered at (135.3166,-40.3262) with a roll angle of 90.1
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 (135.2490,-40.3410) with a radius of 3.000 arc min
This is 3.216 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 2.42 sq. arc min or 0.09 of the BAT error circle
The XRT error circle is centered at (135.2173,-40.2889) with a radius of 0.092 arc min
This is 5.064 arc min from the center of the uvot region
The area of the XRT error circle is 0.026 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 1 of trigger 868846
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181026d03h35m34s143412usUT
Observation start time is 2018-10-26T03:00:11.6
Examining file ./868846_g144_uvot_sources_image.fits
The exposure ID is 562215611
The exposure is 63.226 sec.
The bin size is 2 pixels
The filter is WHITE
There are 9 detected source(s) for 868846_g144
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 135.3086 , -40.3259 with radius 2.00 arc min.
n_usno: 153 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 10.28188
RA DEC Mag Color
bright star 0: 135.30961 (09:01:14.31) -40.30419 (-40:18:15.1) 10.44 USNO-V
bright star 1: 135.27633 (09:01:06.32) -40.32622 (-40:19:34.4) 10.28 USNO-V
bright star 2: 135.27641 (09:01:06.34) -40.30872 (-40:18:31.4) 11.54 USNO-V
Found 9 entries without IDs and 7 entries that are acceptable afterglow candidates for 868846_g144.
Acceptable entries have no ID, XRT distances < 13.75", 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=135.2490 (09:00:59.76) DEC=-40.3410 (-40:20:27.6)
XRT distances are from RA=135.2173 (09:00:52.16) DEC=-40.2889 (-40:17:19.9)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 868846_g144 with genie
ra=135.29405 (09:01:10.57) dec=-40.32872 (-40:19:43.4) +/- 0.7" mag=16.25+/-0.14
dist=254.8 REFID=1 major=0.8 minor=0.5 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 131.3 arc sec from the BAT position.
Found 7 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
135.2993 -40.3249 19.9 -1 USNO-B1 19.80 18.18 18.90
135.2991 -40.3285 13.9 -1 USNO-B1 20.62 18.88 19.65
135.2964 -40.3332 17.3 -1 USNO-B1 20.03 99.99 99.99
135.2957 -40.3329 15.8 -1 USNO-B1 19.85 17.23 18.40
135.2932 -40.3312 9.4 -1 USNO-B1 16.37 14.89 15.55 *
135.2908 -40.3263 12.3 -1 USNO-B1 18.17 17.52 17.81 *
135.2907 -40.3257 14.3 -1 USNO-B1 20.05 19.29 19.62
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 3 in the list of sources is a candidate afterglow for 868846_g144 with genie
ra=135.32163 (09:01:17.19) dec=-40.32828 (-40:19:41.8) +/- 0.7" mag=13.71+/-0.14
dist=319.5 REFID=4 major=5.6 minor=3.3 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 204.5 arc sec from the BAT position.
Found 5 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
135.3214 -40.3314 11.2 -1 USNO-B1 19.90 18.66 19.21 *
135.3201 -40.3335 19.2 -1 USNO-B1 20.83 19.52 20.10
135.3242 -40.3266 9.3 -1 USNO-B1 20.38 18.91 19.56 *
135.3239 -40.3313 12.4 -1 USNO-B1 19.50 17.99 18.66 *
135.3236 -40.3324 15.7 -1 USNO-B1 18.31 16.27 17.18
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 4 in the list of sources is a candidate afterglow for 868846_g144 with genie
ra=135.31677 (09:01:16.03) dec=-40.32637 (-40:19:34.9) +/- 0.7" mag=13.71+/-0.14
dist=304.5 REFID=5 major=5.8 minor=2.6 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 193.3 arc sec from the BAT position.
Found 1 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
135.3112 -40.3248 16.2 -1 USNO-B1 21.19 19.82 20.43
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 5.8
-----------------
Entry 5 in the list of sources is a candidate afterglow for 868846_g144 with genie
ra=135.31160 (09:01:14.78) dec=-40.33128 (-40:19:52.6) +/- 0.7" mag=15.47+/-0.14
dist=300.4 REFID=6 major=1.9 minor=1.7 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 175.3 arc sec from the BAT position.
Found 3 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
135.3093 -40.3294 9.3 -1 USNO-B1 18.73 17.68 18.15 *
135.3053 -40.3326 18.1 -1 USNO-B1 16.96 15.96 16.41
135.3094 -40.3335 10.0 -1 USNO-B1 19.81 18.42 19.04 *
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 6 in the list of sources is a candidate afterglow for 868846_g144 with genie
ra=135.30940 (09:01:14.26) dec=-40.33314 (-40:19:59.3) +/- 0.7" mag=13.71+/-0.14
dist=298.7 REFID=7 major=2.9 minor=1.5 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 168.2 arc sec from the BAT position.
Found 3 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
135.3093 -40.3294 13.6 -1 USNO-B1 18.73 17.68 18.15
135.3053 -40.3326 11.5 -1 USNO-B1 16.96 15.96 16.41 *
135.3094 -40.3335 1.3 -1 USNO-B1 19.81 18.42 19.04 *
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 7 in the list of sources is a candidate afterglow for 868846_g144 with genie
ra=135.29626 (09:01:11.10) dec=-40.32670 (-40:19:36.1) +/- 0.7" mag=16.50+/-0.14
dist=255.9 REFID=8 major=0.8 minor=0.7 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 139.5 arc sec from the BAT position.
Found 8 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
135.3023 -40.3260 16.7 -1 USNO-B1 18.92 17.41 18.08
135.2993 -40.3249 10.6 -1 USNO-B1 19.80 18.18 18.90 *
135.2999 -40.3229 17.0 -1 USNO-B1 17.59 16.12 16.77
135.2997 -40.3222 18.9 -1 USNO-B1 19.62 18.31 18.89
135.2991 -40.3285 10.3 -1 USNO-B1 20.62 18.88 19.65 *
135.2932 -40.3312 18.4 -1 USNO-B1 16.37 14.89 15.55
135.2908 -40.3263 14.9 -1 USNO-B1 18.17 17.52 17.81
135.2907 -40.3257 15.7 -1 USNO-B1 20.05 19.29 19.62
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 8 in the list of sources is a candidate afterglow for 868846_g144 with genie
ra=135.29500 (09:01:10.80) dec=-40.32772 (-40:19:39.8) +/- 0.8" mag=16.71+/-0.14
dist=255.0 REFID=9 major=0.8 minor=0.6 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 135.0 arc sec from the BAT position.
Found 6 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
135.2993 -40.3249 15.6 -1 USNO-B1 19.80 18.18 18.90
135.2991 -40.3285 11.7 -1 USNO-B1 20.62 18.88 19.65 *
135.2957 -40.3329 18.9 -1 USNO-B1 19.85 17.23 18.40
135.2932 -40.3312 13.6 -1 USNO-B1 16.37 14.89 15.55
135.2908 -40.3263 12.4 -1 USNO-B1 18.17 17.52 17.81 *
135.2907 -40.3257 13.9 -1 USNO-B1 20.05 19.29 19.62
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
Found 0 entries in star catalog(s) within 20" of the XRT position.
List UVOT sources within 20" of the XRT position:
There are 64836.367 counts in the bkg source region of 5649.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 11.477 counts/pixel (5-sig UL in 4" is 19.09 mag) for 868846_g144
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 19.64, XRT distances < 13.75",
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: 868846_562215611_181026d03h35m34s143412usUT_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(135.3166,-40.3262,45")
fk5;-circle(135.320401555757,-40.3185644183685,6")
fk5;-circle(135.32315442257,-40.3248180856609,6")
fk5;-circle(135.321631467671,-40.328282070483,6")
fk5;-circle(135.316773749848,-40.3263745429759,6")
fk5;-circle(135.311602718614,-40.3312761005309,6")
fk5;-circle(135.309399237611,-40.3331382351627,6")
image paragraph message for exposure 1 of trigger 868846
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 GRB181026 (Swift/BAT trigger 868846) at 02:57:46 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 63 seconds with the White filter
starting 123 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 868846 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181026d03h35m35s530911usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=868846
-expid=562215611 -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/868846/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for Genie image. BAT position found.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 562215611.63674 or about 2018:299:03:00:06 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 9 source(s) in Genie image catalog. Found 9 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 149 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 25% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region. The closest Genie source has ra= 135.2940 dec= -40.3287 mag=16.25
sep=254.79".
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?
562215611 123 WHITE srclist data are not available.
562215611 123 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------