image overlap message for exposure 1 of trigger 948219
uvot_overlap.pl vrs. 2010-12-20b fem started at 200109d14h17m32s661279usUT
The observation of trigger 948219 started 2020-01-07T19:41:55.6
Examining file ./948219_g926_uvot_sky_image.fits
The exposure ID is 600118915
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (107.0516,-83.7189) with a roll angle of 181.3
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 (107.0667,-83.7157) with a radius of 1.200 arc min
This is 0.217 arc min from the center of the uvot region
The area of the BAT error circle is 4.52 sq. arc min
The UVOT/BAT overlap is 4.49 sq. arc min or 0.99 of the BAT error circle
The XRT error circle is centered at (106.9086,-83.7162) with a radius of 0.067 arc min
This is 0.952 arc min from the center of the uvot region
The area of the XRT error circle is 0.014 sq. arc min
The UVOT/XRT overlap is 0.014 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 948219
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200109d14h17m33s918637usUT
Observation start time is 2020-01-07T19:41:55.6
Examining file ./948219_g926_uvot_sources_image.fits
The exposure ID is 600118915
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 4 detected source(s) for 948219_g926
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 107.1021 , -83.7158 with radius 2.22 arc min.
n_usno: 71 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Found 4 entries without IDs and 4 entries that are acceptable afterglow candidates for 948219_g926.
Acceptable entries have no ID, XRT distances < 10", 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=107.0667 (07:08:16.00) DEC=-83.7157 (-83:42:56.5)
XRT distances are from RA=106.9086 (07:07:38.07) DEC=-83.7162 (-83:42:58.3)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 948219_g926 with genie
ra=106.92758 (07:07:42.62) dec=-83.72277 (-83:43:22.0) +/- 0.8" mag=18.69+/-0.16
dist=24.8 REFID=1 major=1.8 minor=1.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 60.4 arc sec from the BAT position.
Found 2 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
106.9183 -83.7230 3.7 -1 USNO-B1 17.13 16.02 16.51 *
106.8995 -83.7252 14.0 -1 USNO-B1 19.93 18.90 19.36
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 948219_g926 with genie
ra=107.06354 (07:08:15.25) dec=-83.70878 (-83:42:31.6) +/- 0.8" mag=18.48+/-0.16
dist=66.7 REFID=2 major=1.6 minor=1.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 24.9 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
107.0498 -83.7091 5.5 -1 USNO-B1 17.16 16.48 16.78 *
107.0458 -83.7047 16.1 -1 USNO-B1 99.99 19.81 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 948219_g926 with genie
ra=106.92496 (07:07:41.99) dec=-83.71520 (-83:42:54.7) +/- 0.7" mag=15.63+/-0.14
dist=7.3 REFID=3 major=2.1 minor=1.8 flag=0
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
106.9488 -83.7168 10.9 -1 USNO-B1 99.99 20.62 99.99 *
106.9114 -83.7153 5.4 -1 USNO-B1 15.08 14.28 14.63 *
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 948219_g926 with genie
ra=107.27915 (07:09:07.00) dec=-83.71850 (-83:43:06.6) +/- 0.8" mag=17.77+/-0.15
dist=146.2 REFID=4 major=1.5 minor=0.5 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 84.3 arc sec from the BAT position.
This source is near the edge of image (0.961)
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
107.2668 -83.7188 5.0 -1 USNO-B1 16.37 15.40 15.83 *
107.2769 -83.7215 10.7 -1 USNO-B1 17.84 16.89 17.31 *
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 3 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
106.9488 -83.7168 16.0 -1 USNO-B1 99.99 20.62 99.99
106.9114 -83.7153 3.4 -1 USNO-B1 15.08 14.28 14.63
106.8678 -83.7149 16.8 -1 USNO-B1 19.30 18.56 18.89
The closest star is 3.37" away.
List UVOT sources within 20" of the XRT position:
Unmatched source ra=106.92496 (07:07:41.99) dec=-83.71520 (-83:42:54.7) +/- 0.7" mag=15.63+/-0.14 dist=7.3 REFID=3 flag=0
There are 2.2352373E+05 counts in the bkg source region of 6208.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 36.006 counts/pixel (5-sig UL in 4" is 19.40 mag) for 948219_g926
There are 8881.5557 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 44.408 counts/pixel for 948219_g926
XRT source is too far (57.1494952149423") from center -- do not compute local background.
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 19.96, XRT distances < 10",
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: 948219_600118915_200109d14h17m33s918637usUT_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(107.0516,-83.7189,45")
fk5;-circle(106.927578016625,-83.7227690746574,6")
fk5;-circle(107.063536825777,-83.7087835510174,6")
Region file: 948219_600118915_200109d14h17m33s918637usUT_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(106.90863,-83.71619,8")
image paragraph message for exposure 1 of trigger 948219
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.
1 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 GRB200107 (Swift/BAT trigger 948219) at 19:26:28 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 902 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 expected extinction corresponding to E(B-V) of 0.19.
------- notes for trigger 948219 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200109d14h17m37s651726usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=948219
-expid=600118915 -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/948219/
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 600118915.61942 or about 0000:9503:19:41:59 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 4 source(s) in Genie image catalog. 1 source(s) are within 20.0" of the
xrt position. Found 4 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
19.96 mag. Found 67 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 9% of the Genie image region.
Found 1 Genie source(s) within 20.0" of the XRT position. The brightest such
source has ra= 106.9250 dec= -83.7152 mag=15.63 sep=7.35". The closest Genie
source has ra= 106.9250 dec= -83.7152 mag=15.63 sep=7.35".
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 902 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 07:07:41.99 = 106.92496
DEC(J2000) = -83:42:54.7 = -83.71520
with a 90%-confidence error radius of about 0.74 arc sec. This position is 7.35
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.63 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.19.
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?
600118915 902 WHITE srclist data are not available.
600118915 902 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------