image overlap message for exposure 2 of trigger 1217736
uvot_overlap.pl vrs. 2010-12-20b fem started at 240227d06h23m08s809407usUT
The observation of trigger 1217736 started 2024-02-27T06:00:11.7
Examining file 1217736_g355_uvot_sky_image.fits
The exposure ID is 730706411
The exposure time is 111.747 (seconds)
The filter is U.
*** Warning -- no aspect solution was applied to the image.
consequently the calculated overlaps are questionable.
*** Warning -- found 4712 null pixels in the image.
The uvot region is centered at (84.2404,21.7775) with a roll angle of 267.3
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 (83.8920,21.7320) with a radius of 3.000 arc min
This is 19.603 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 0.00 sq. arc min or 0.00 of the BAT error circle
Could not find the location of an XRT error circle
image afterglow message for exposure 2 of trigger 1217736
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240227d06h23m09s727586usUT
Observation start time is 2024-02-27T06:00:11.7
Examining file 1217736_g355_uvot_sources_image.fits
The exposure ID is 730706411
The exposure is 111.747 sec.
The bin size is 2 pixels
The filter is U
There are 10 detected source(s) for 1217736_g355
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 84.2347 , 21.7768 with radius 2.51 arc min.
n_usno: 169 n_gsc: 168
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Found 10 entries without IDs and 0 entries that are acceptable afterglow candidates for 1217736_g355.
Acceptable entries have no ID, BAT distance < 210" or XRT distance < 20", 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=83.8920 (05:35:34.08) DEC=21.7320 (+21:43:55.2)
XRT distances are as reported in catalog file.
*** WARNING 100 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to BAT position is no. 8:
ra= 84.21470 dec= 21.76702 +/- 0.8" mag=18.40+/-0.19 dist=1086.2 REFID=9 flag=0
There are 11834.391 counts in the bkg source region of 5946.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.990 counts/pixel (5-sig UL in 4" is 19.22 mag) for 1217736_g355
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.21, BAT distances < 210",
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: 1217736_730706411_240227d06h23m09s727586usUT_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(84.2404,21.7775,45")
fk5;-circle(84.2389922644862,21.7786572449047,6")
fk5;-circle(84.2276643527218,21.7744670506228,6")
fk5;-circle(84.2324023557163,21.7745900481457,6")
fk5;-circle(84.2316915487925,21.7737718161385,6")
fk5;-circle(84.2280605857476,21.7709266008119,6")
image paragraph message for exposure 2 of trigger 1217736
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no aspect solution, damaged image (negative pixel value)
SRCLIST PROBLEM: no srclist afterglow info
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB240227 (Swift/BAT trigger 1217736) at 05:54:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 112 seconds with the U filter starting
323 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, damaged image (negative pixel value). 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
0.566.
------- notes for trigger 1217736 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240227d06h23m10s885036usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1217736
-expid=730706411 -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/1217736/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
The Genie image appears to be DAMAGED with a min. value of -15.607121.
No XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 730706411.71348 or about 2024:058:06:00:06 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 10 source(s) in Genie image catalog. 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 19.21 mag. Found 168 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
18% of the Genie image region. The Genie image is INCOMPLETE with 4712 null
pixels.
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?
730706411 323 U srclist data are not available.
730706411 323 U image found no candidates.
List afterglow candidates for other finding charts.
730706253 165 ? srclist data are not available.
730706253 165 WHITE image found no candidates.
------- Tokens for Quick GCN -------