image overlap message for exposure 2 of trigger 1231488
uvot_overlap.pl vrs. 2010-12-20b fem started at 240529d05h55m35s876268usUT
The observation of trigger 1231488 started 2024-05-29T03:04:45.3
Examining file ./1231488_g374_uvot_sky_image.fits
The exposure ID is 738644685
The exposure time is 249.935 (seconds)
The filter is U.
*** Warning -- found 14006 null pixels in the image.
The uvot region is centered at (335.3612,51.5636) with a roll angle of 75.3
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 (335.3220,51.5550) with a radius of 3.000 arc min
This is 1.552 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 at most 5.62 sq. arc min or 0.20 of the BAT error circle
The XRT error circle is centered at (335.3574,51.5617) with a radius of 0.037 arc min
This is 0.184 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1231488
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240529d05h55m47s940804usUT
Observation start time is 2024-05-29T03:04:45.3
Examining file ./1231488_g374_uvot_sources_image.fits
The exposure ID is 738644685
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 2 detected source(s) for 1231488_g374
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 335.3580 , 51.5665 with radius 2.00 arc min.
n_usno: 249 n_gsc: 281
Bright star catalog has no entries brighter than 12 mag
Found 2 entries without IDs and 0 entries that are acceptable afterglow candidates for 1231488_g374.
Acceptable entries have no ID, XRT distances < 5.5", 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=335.3220 (22:21:17.28) DEC=51.5550 (+51:33:18.0)
XRT distances are from RA=335.3574 (22:21:25.78) DEC=51.5617 (+51:33:42.0)
*** WARNING 100 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 0:
ra=335.38009 dec= 51.56340 +/- 0.7" mag= NaN+/-0.14 dist=51.1 REFID=1 flag=19
Found 14 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
335.3615 51.5629 10.3 -1 USNO-B1 18.78 17.52 18.08
335.3635 51.5632 14.8 -1 USNO-B1 19.81 18.05 18.83
335.3559 51.5615 3.4 -1 USNO-B1 17.77 16.20 16.89
335.3510 51.5630 15.1 -1 USNO-B1 20.27 18.45 19.26
335.3662 51.5610 19.9 -1 USNO-B1 19.97 19.17 19.53
335.3488 51.5612 19.4 -1 USNO-B1 20.02 18.50 19.18
335.3541 51.5567 19.3 -1 USNO-B1 15.74 14.22 14.89
335.3615 51.5628 10.1 -1 GSC2.3 17.65 18.90 17.78
335.3637 51.5631 14.9 -1 GSC2.3 18.52 20.53 99.99
335.3560 51.5615 3.4 -1 GSC2.3 16.37 17.38 16.89
335.3512 51.5629 14.7 -1 GSC2.3 18.51 20.83 19.52
335.3515 51.5602 14.3 -1 GSC2.3 19.63 99.99 99.99
335.3488 51.5610 19.4 -1 GSC2.3 18.68 20.03 18.99
335.3541 51.5566 19.5 -1 GSC2.3 14.29 15.03 14.55
The closest star is 3.37" away.
List UVOT sources within 20" of the XRT position:
There are 2.6049675E+06 counts in the bkg source region of 2424.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1074.657 counts/pixel (5-sig UL in 4" is 16.68 mag) for 1231488_g374
There are 0.0000000 counts in the xrt source region of 0.0000000 pixels.
There are 1.0224568E+06 counts in the xrt_bkg source region of 221.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 4626.501 counts/pixel (5-sig UL in 4" is 15.88 mag) for 1231488_g374
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 17.23, XRT distances < 5.5",
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: 1231488_738644685_240529d05h55m47s940804usUT_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(335.3612,51.5636,45")
fk5;-circle(335.380089408796,51.563404714002,6")
Region file: 1231488_738644685_240529d05h55m47s940804usUT_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(335.35742,51.56167,8")
Region file: 1231488_738644685_240529d05h55m47s940804usUT_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(335.35742,51.56167,25")
fk5;-circle(335.35742,51.56167,15")
image paragraph message for exposure 2 of trigger 1231488
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 (high pixel value), damaged image (negative pixel value)
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB240529 (Swift/BAT trigger 1231488) at 02:58:30 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
341 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 (high pixel value), damaged image
(negative pixel value). The 8'x8' region for the list of sources generated
on-board covers 100% of the XRT error circle. Because of the density of
catalogued stars, further analysis is required to report an upper limit for any
afterglow in the region. No correction has been made for the large, but
uncertain, extinction expected.
------- notes for trigger 1231488 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240529d05h55m50s711370usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1231488
-expid=738644685 -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/1231488/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. The Genie image appears to be
DAMAGED with a max. value of 10996.4.
The Genie image appears to be DAMAGED with a min. value of -1894.164917.
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 738644685.32064 or about 2024:150:03:04:40 UT
Found 2891 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 44% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 20 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
THERE IS NO ASPECT SOLUTION for the image data.
Found 2 source(s) in Genie image catalog. Found 2 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 17.23 mag. Found 270 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 46% of the
Genie image region. The Genie image is INCOMPLETE with 14006 null pixels.
The number of srclist sources filled the available telemetry. The weakest
source detected was 18.21 mag. The closest srclist source has ra= 335.3545 dec=
51.5566 mag=16.35 sep=19.28". The closest Genie source has ra= 335.3801 dec=
51.5634 mag= NaN sep=51.12".
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?
738644685 340 U srclist found no candidates.
738644685 340 U image found no candidates.
List afterglow candidates for other finding charts.
738644472 127 WHITE 335.35851 51.56205 17.84/19.2 2.8 srclist Yes
738644472 127 WHITE image found no candidates.
------- Tokens for Quick GCN -------