image overlap message for exposure 1 of trigger 1216743
uvot_overlap.pl vrs. 2010-12-20b fem started at 240221d22h26m01s989073usUT
The observation of trigger 1216743 started 2024-02-21T22:20:34.6
Examining file 1216743_g906_uvot_sky_image.fits
The exposure ID is 730246834
The exposure time is 149.835 (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 (245.3475,-15.6753) with a roll angle of 99.9
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
Could not find the location of a BAT error circle
The XRT error circle is centered at (245.3427,-15.6761) with a radius of 0.078 arc min
This is 0.284 arc min from the center of the uvot region
The area of the XRT error circle is 0.019 sq. arc min
The UVOT/XRT overlap is 0.019 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1216743
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240221d22h26m03s522525usUT
Observation start time is 2024-02-21T22:20:34.6
Examining file 1216743_g906_uvot_sources_image.fits
The exposure ID is 730246834
The exposure is 149.835 sec.
The bin size is 2 pixels
The filter is WHITE
There are 8 detected source(s) for 1216743_g906
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 245.3459 , -15.6764 with radius 2.12 arc min.
n_usno: 109 n_gsc: 106
Bright star catalog has no entries brighter than 12 mag
Found 8 entries without IDs and 0 entries that are acceptable afterglow candidates for 1216743_g906.
Acceptable entries have no ID, XRT distances < 11.75", 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 as reported in catalog file.
XRT distances are from RA=245.3427 (16:21:22.25) DEC=-15.6761 (-15:40:34.0)
*** WARNING 100 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 1:
ra=245.34986 dec=-15.66700 +/- 0.8" mag=19.61+/-0.18 dist=41.1 REFID=2 flag=0
Found 8 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
245.3472 -15.6738 17.7 -1 USNO-B1 19.76 18.65 19.14
245.3404 -15.6778 10.0 -1 USNO-B1 19.11 19.20 19.16
245.3403 -15.6773 9.5 -1 USNO-B1 18.73 18.06 18.36
245.3408 -15.6802 16.4 -1 USNO-B1 20.06 19.00 19.47
245.3373 -15.6777 19.5 -1 USNO-B1 20.88 99.99 99.99
245.3472 -15.6738 17.6 -1 GSC2.3 18.31 19.91 99.99
245.3402 -15.6773 9.7 -1 GSC2.3 17.87 19.02 99.99
245.3407 -15.6803 16.5 -1 GSC2.3 18.73 20.15 99.99
The closest star is 9.46" away.
List UVOT sources within 20" of the XRT position:
There are 1.0247102E+05 counts in the bkg source region of 5905.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 17.353 counts/pixel (5-sig UL in 4" is 19.80 mag) for 1216743_g906
There are 3442.0786 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 17.210 counts/pixel for 1216743_g906
There are 21897.977 counts in the xrt_bkg source region of 1251.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 17.504 counts/pixel (5-sig UL in 4" is 19.80 mag) for 1216743_g906
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.35, XRT distances < 11.75",
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: 1216743_730246834_240221d22h26m03s522525usUT_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(245.3475,-15.6753,45")
fk5;-circle(245.349863226441,-15.667004540748,6")
fk5;-circle(245.353722089879,-15.6703972881524,6")
fk5;-circle(245.356028424667,-15.6731069889165,6")
fk5;-circle(245.359990538811,-15.675765513583,6")
Region file: 1216743_730246834_240221d22h26m03s522525usUT_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(245.3427,-15.6761,8")
Region file: 1216743_730246834_240221d22h26m03s522525usUT_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(245.3427,-15.6761,25")
fk5;-circle(245.3427,-15.6761,15")
image paragraph message for exposure 1 of trigger 1216743
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.
------ Start for Possible Stand-alone Circular ----
In response to GRB?????? (Swift/BAT trigger 1216743) at ??? UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 16923 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. Data 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 0.350.
------- notes for trigger 1216743 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240221d22h26m06s574447usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1216743
-expid=730246834 -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/1216743/
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. No BAT position found.
UVOT exposure began at MET 730246834.60228 or about 2024:052:22:20:29 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 8 source(s) in Genie image catalog. Found 8 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.35 mag. Found 105 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 16% of the
Genie image region. The closest Genie source has ra= 245.3499 dec= -15.6670
mag=19.61 sep=41.09".
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?
730246834 ???? ? srclist data are not available.
730246834 ???? WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------