image overlap message for exposure 1 of trigger 1186294
uvot_overlap.pl vrs. 2010-12-20b fem started at 230820d19h43m03s778463usUT
The observation of trigger 1186294 started 2023-08-20T19:31:35.7
Examining file 1186294_g182_uvot_sky_image.fits
The exposure ID is 714252695
The exposure time is 149.879 (seconds)
The filter is WHITE.
*** Warning -- no aspect solution was applied to the image.
consequently the calculated overlaps are questionable.
The uvot region is centered at (132.8834,-42.0824) with a roll angle of 19.8
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 (132.8860,-42.1420) with a radius of 3.000 arc min
This is 3.578 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 1.53 sq. arc min or 0.05 of the BAT error circle
The XRT error circle is centered at (132.8835,-42.0881) with a radius of 0.085 arc min
This is 0.343 arc min from the center of the uvot region
The area of the XRT error circle is 0.023 sq. arc min
The UVOT/XRT overlap is 0.023 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1186294
find_uvot_ag.pl vrs. 2023-04-25a fem started at 230820d19h43m04s947731usUT
Observation start time is 2023-08-20T19:31:35.7
Examining file 1186294_g182_uvot_sources_image.fits
The exposure ID is 714252695
The exposure is 149.879 sec.
The bin size is 2 pixels
The filter is WHITE
There are 10 detected source(s) for 1186294_g182
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 132.8722 , -42.0764 with radius 2.00 arc min.
n_usno: 143 n_gsc: 142
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.1336
RA DEC Mag Color
bright star 0: 132.90093 (08:51:36.22) -42.07033 (-42:04:13.2) 10.13 USNO-V
Found 10 entries without IDs and 1 entries that are acceptable afterglow candidates for 1186294_g182.
Acceptable entries have no ID, XRT distances < 12.75", 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=132.8860 (08:51:32.64) DEC=-42.1420 (-42:08:31.2)
XRT distances are from RA=132.8835 (08:51:32.04) DEC=-42.0881 (-42:05:17.2)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1186294_g182 with genie
ra=132.88638 (08:51:32.73) dec=-42.08643 (-42:05:11.2) +/- 0.8" mag=19.15+/-0.19
dist=9.8 REFID=1 major=2.6 minor=2.1 flag=0
Found 6 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
132.8861 -42.0849 5.4 -1 USNO-B1 19.10 16.80 17.82 *
132.8860 -42.0917 18.8 -1 USNO-B1 19.74 18.59 19.10
132.8834 -42.0814 19.8 -1 GSC2.3 20.18 99.99 99.99
132.8806 -42.0846 16.8 -1 GSC2.3 20.55 99.99 99.99
132.8859 -42.0848 5.9 -1 GSC2.3 16.89 19.72 99.99 *
132.8858 -42.0916 18.6 -1 GSC2.3 18.72 20.73 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
Found 5 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
132.8861 -42.0849 13.3 -1 USNO-B1 19.10 16.80 17.82
132.8860 -42.0917 14.5 -1 USNO-B1 19.74 18.59 19.10
132.8806 -42.0846 14.8 -1 GSC2.3 20.55 99.99 99.99
132.8859 -42.0848 13.3 -1 GSC2.3 16.89 19.72 99.99
132.8858 -42.0916 14.0 -1 GSC2.3 18.72 20.73 99.99
The closest star is 13.30" away.
List UVOT sources within 20" of the XRT position:
Unmatched source ra=132.88638 (08:51:32.73) dec=-42.08643 (-42:05:11.2) +/- 0.8" mag=19.15+/-0.19 dist=9.8 REFID=1 flag=0
There are 2.3682816E+05 counts in the bkg source region of 5889.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 40.215 counts/pixel (5-sig UL in 4" is 19.34 mag) for 1186294_g182
There are 8403.7852 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 42.443 counts/pixel for 1186294_g182
There are 50489.707 counts in the xrt_bkg source region of 1243.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 40.619 counts/pixel (5-sig UL in 4" is 19.34 mag) for 1186294_g182
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 19.90, XRT distances < 12.75",
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: 1186294_714252695_230820d19h43m04s947731usUT_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(132.8834,-42.0824,45")
fk5;-circle(132.886380295086,-42.0864318551255,6")
fk5;-circle(132.874668312597,-42.0752733765375,6")
fk5;-circle(132.876486280269,-42.076958946936,6")
fk5;-circle(132.875856123541,-42.0814561283249,6")
Region file: 1186294_714252695_230820d19h43m04s947731usUT_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(132.8835,-42.0881,8")
Region file: 1186294_714252695_230820d19h43m04s947731usUT_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(132.8835,-42.0881,25")
fk5;-circle(132.8835,-42.0881,15")
fk5;-circle(132.886380295086,-42.0864318551255,6")
image paragraph message for exposure 1 of trigger 1186294
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.
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 GRB230820 (Swift/BAT trigger 1186294) at 19:28:32 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 1186294 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230820d19h43m07s382370usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1186294
-expid=714252695 -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/1186294/
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 714252695.72218 or about 2023:232:19:31:30 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 10 source(s) in Genie image catalog. 1 source(s) are within 20.0" of the
xrt position. Found 10 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
19.90 mag. Found 139 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 24% of the Genie image region.
Found 1 Genie source(s) within 20.0" of the XRT position. The brightest such
source has ra= 132.8864 dec= -42.0864 mag=19.15 sep=9.76". The closest Genie
source has ra= 132.8864 dec= -42.0864 mag=19.15 sep=9.76".
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) = 08:51:32.73 = 132.88638
DEC(J2000) = -42:05:11.1 = -42.08643
with a 90%-confidence error radius of about 0.83 arc sec. This position is 9.76
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.15 with a 1-sigma error of about 0.19. 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?
714252695 151 WHITE srclist data are not available.
714252695 151 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------