image overlap message for exposure 1 of trigger 1006906
uvot_overlap.pl vrs. 2010-12-20b fem started at 201116d23h07m52s069224usUT
The observation of trigger 1006906 started 2020-11-16T23:02:15.1
Examining file 1006906_g176_uvot_sky_image.fits
The exposure ID is 627260535
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (85.7629,25.2377) with a roll angle of 85.3
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 (85.7760,25.2330) with a radius of 3.000 arc min
This is 0.763 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 (85.7592,25.2369) with a radius of 0.090 arc min
This is 0.207 arc min from the center of the uvot region
The area of the XRT error circle is 0.025 sq. arc min
The UVOT/XRT overlap is 0.025 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1006906
find_uvot_ag.pl vrs. 2020-10-30 fem started at 201116d23h07m53s599406usUT
Observation start time is 2020-11-16T23:02:15.1
Examining file 1006906_g176_uvot_sources_image.fits
The exposure ID is 627260535
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 5 detected source(s) for 1006906_g176
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 85.7575 , 25.2368 with radius 2.00 arc min.
n_usno: 105 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Found 5 entries without IDs and 5 entries that are acceptable afterglow candidates for 1006906_g176.
Acceptable entries have no ID, XRT distances < 13.5", 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=85.7760 (05:43:06.24) DEC=25.2330 (+25:13:58.8)
XRT distances are from RA=85.7592 (05:43:02.21) DEC=25.2369 (+25:14:12.8)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1006906_g176 with genie
ra=85.76650 (05:43:03.96) dec=25.23240 (+25:13:56.7) +/- 0.7" mag=16.73+/-0.14
dist=28.8 REFID=1 major=1.8 minor=1.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 31.0 arc sec from the BAT position.
Found 3 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
85.7635 25.2306 11.7 -1 USNO-B1 20.31 18.79 19.46 *
85.7683 25.2333 6.6 -1 USNO-B1 16.48 14.90 15.60 *
85.7655 25.2290 12.8 -1 USNO-B1 20.16 18.57 19.28 *
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 1 in the list of sources is a candidate afterglow for 1006906_g176 with genie
ra=85.75192 (05:43:00.46) dec=25.24109 (+25:14:27.9) +/- 0.7" mag=13.72+/-0.14
dist=28.1 REFID=2 major=7.6 minor=2.4 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 83.6 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
85.7550 25.2420 10.5 -1 USNO-B1 20.27 18.12 19.07 *
85.7509 25.2368 15.8 -1 USNO-B1 14.51 12.95 13.64
85.7499 25.2379 13.1 -1 USNO-B1 18.41 16.78 17.50 *
85.7521 25.2428 6.1 -1 USNO-B1 99.99 18.85 99.99 *
85.7493 25.2401 9.1 -1 USNO-B1 20.30 18.16 19.12 *
85.7508 25.2431 8.3 -1 USNO-B1 20.17 18.30 19.13 *
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 1006906_g176 with genie
ra=85.74840 (05:42:59.62) dec=25.24125 (+25:14:28.5) +/- 0.7" mag=13.72+/-0.14
dist=38.5 REFID=3 major=5.7 minor=4.0 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 94.7 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
85.7509 25.2368 18.0 -1 USNO-B1 14.51 12.95 13.64
85.7499 25.2379 12.9 -1 USNO-B1 18.41 16.78 17.50 *
85.7521 25.2428 13.3 -1 USNO-B1 99.99 18.85 99.99 *
85.7493 25.2401 5.1 -1 USNO-B1 20.30 18.16 19.12 *
85.7508 25.2431 10.2 -1 USNO-B1 20.17 18.30 19.13 *
85.7464 25.2367 17.6 -1 USNO-B1 99.99 18.90 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 3 in the list of sources is a candidate afterglow for 1006906_g176 with genie
ra=85.76002 (05:43:02.41) dec=25.24102 (+25:14:27.7) +/- 0.7" mag=16.27+/-0.14
dist=15.1 REFID=4 major=1.5 minor=0.6 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 59.5 arc sec from the BAT position.
Found 2 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
85.7585 25.2412 4.9 -1 USNO-B1 17.68 15.92 16.70 *
85.7550 25.2420 16.9 -1 USNO-B1 20.27 18.12 19.07
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 1006906_g176 with genie
ra=85.76024 (05:43:02.46) dec=25.23895 (+25:14:20.2) +/- 0.7" mag=13.72+/-0.14
dist=8.1 REFID=5 major=6.3 minor=4.9 flag=3 (neighbor+blended)
Found 2 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
85.7604 25.2352 13.6 -1 USNO-B1 99.99 18.75 99.99
85.7585 25.2412 9.8 -1 USNO-B1 17.68 15.92 16.70 *
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 2 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
85.7604 25.2352 7.3 -1 USNO-B1 99.99 18.75 99.99
85.7585 25.2412 15.6 -1 USNO-B1 17.68 15.92 16.70
The closest star is 7.31" away.
List UVOT sources within 20" of the XRT position:
Unmatched source ra=85.76002 (05:43:02.41) dec=25.24102 (+25:14:27.7) +/- 0.7" mag=16.27+/-0.14 dist=15.1 REFID=4 flag=3
Unmatched source ra=85.76024 (05:43:02.46) dec=25.23895 (+25:14:20.2) +/- 0.7" mag=13.72+/-0.14 dist=8.1 REFID=5 flag=3
There are 1.3247278E+05 counts in the bkg source region of 5880.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 22.529 counts/pixel (5-sig UL in 4" is 19.66 mag) for 1006906_g176
There are 11096.459 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 55.482 counts/pixel for 1006906_g176
There are 28327.924 counts in the xrt_bkg source region of 1158.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 24.463 counts/pixel (5-sig UL in 4" is 19.61 mag) for 1006906_g176
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 20.21, XRT distances < 13.5",
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: 1006906_627260535_201116d23h07m53s599406usUT_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(85.7629,25.2377,45")
fk5;-circle(85.7665042161002,25.2324037684924,6")
fk5;-circle(85.7519212313028,25.2410942709699,6")
fk5;-circle(85.7483975794311,25.241251205013,6")
fk5;-circle(85.7600227036025,25.2410220529692,6")
fk5;-circle(85.7602385695127,25.2389454605056,6")
Region file: 1006906_627260535_201116d23h07m53s599406usUT_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(85.7592,+25.2369,8")
Region file: 1006906_627260535_201116d23h07m53s599406usUT_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(85.7592,+25.2369,25")
fk5;-circle(85.7592,+25.2369,15")
fk5;-circle(85.7665042161002,25.2324037684924,6")
fk5;-circle(85.7519212313028,25.2410942709699,6")
fk5;-circle(85.7600227036025,25.2410220529692,6")
image paragraph message for exposure 1 of trigger 1006906
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.
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 GRB201116 (Swift/BAT trigger 1006906) at 22:59:18 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 151 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 1006906 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 201116d23h07m56s237377usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1006906
-expid=627260535 -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/1006906/
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.
UVOT exposure began at MET 627260535.05106 or about 2020:321:23:02:10 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 5 source(s) in Genie image catalog. 2 source(s) are within 20.0" of the
xrt position. Found 5 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.21 mag. Found 101 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 17% of the Genie image region.
Found 2 Genie source(s) within 20.0" of the XRT position. The brightest such
source has ra= 85.7602 dec= 25.2389 mag=13.72 sep=8.10". The closest Genie
source has ra= 85.7602 dec= 25.2389 mag=13.72 sep=8.10".
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 151 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 05:43:02.46 = 85.76024
DEC(J2000) = +25:14:20.2 = 25.23895
with a 90%-confidence error radius of about 0.74 arc sec. This position is 8.10
arc sec. from the center of the XRT error circle. The estimated magnitude is
13.72 with a 1-sigma error of about 0.14. No correction has been made for the
large, but uncertain, extinction expected.
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?
627260535 151 WHITE srclist data are not available.
627260535 151 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------