image overlap message for exposure 2 of trigger 1202749
uvot_overlap.pl vrs. 2010-12-20b fem started at 231217d19h23m51s751239usUT
The observation of trigger 1202749 started 2023-12-16T18:50:42.9
Examining file ./1202749_g899_uvot_sky_image.fits
The exposure ID is 724445442
The exposure time is 149.857 (seconds)
The filter is U.
The uvot region is centered at (39.7516,33.5943) with a roll angle of 273.1
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 (39.7775,33.6136) with a radius of 2.000 arc min
This is 1.735 arc min from the center of the uvot region
The area of the BAT error circle is 12.57 sq. arc min
The UVOT/BAT overlap is 3.83 sq. arc min or 0.30 of the BAT error circle
The XRT error circle is centered at (39.7727,33.5764) with a radius of 0.065 arc min
This is 1.508 arc min from the center of the uvot region
The area of the XRT error circle is 0.013 sq. arc min
The UVOT/XRT overlap is 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1202749
find_uvot_ag.pl vrs. 2023-04-25a fem started at 231217d19h23m56s471400usUT
Observation start time is 2023-12-16T18:50:42.9
Examining file ./1202749_g899_uvot_catalog_image.fits
The exposure ID is 724445442
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is U
There are 5 detected source(s) for 1202749_g899
Aspect correction adds -0.00203 degrees (-0.488 sec of time = -6.10 arc sec) to RA
Aspect correction adds 0.00055 degrees ( 1.97 arcsec) to Dec
Total aspect correction is 6.41 arcsec
Star catalogs centered at 39.7498 , 33.5957 with radius 2.33 arc min.
n_usno: 123 n_gsc: 64
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 9.24186
RA DEC Mag Color
bright star 0: 39.75515 (02:39:01.24) 33.59209 (+33:35:31.5) 9.24 USNO-V
Mean distance difference (CAT_DELTA) for 5 matched entries is 0.980" for 1202749_g899
Mean and std. dev of mag. difference (MAG_DELTA) are 1.709 and 0.545 for 1202749_g899
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1202749_g899.
Acceptable entries have no ID, XRT distances < 9.75", 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=39.7775 (02:39:06.60) DEC=33.6136 (+33:36:48.9)
XRT distances are from RA=39.7727 (02:39:05.45) DEC=33.5764 (+33:34:35.0)
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
39.7747 33.5750 7.8 -1 USNO-B1 99.99 19.23 99.99
The closest star is 7.82" away.
List UVOT sources within 10" of the XRT position:
There are 14725.982 counts in the bkg source region of 6196.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.377 counts/pixel (5-sig UL in 4" is 19.44 mag) for 1202749_g899
Do not compute counts in XRT region because position is too far from center.
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 19.99, XRT distances < 9.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1202749_724445442_231217d19h23m56s471400usUT_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(39.7516,33.5943,45")
fk5;-circle(39.7550200088545,33.5917511972514,6")
image paragraph message for exposure 2 of trigger 1202749
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: no srclist afterglow info
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB231216 (Swift/BAT trigger 1202749) at 18:35:42 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the U filter starting
868 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image covers none of the
XRT error circle. 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 0.082.
------- notes for trigger 1202749 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 231217d19h23m57s539387usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1202749
-expid=724445442 -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/1202749/
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 724445442.90236 or about 2023:350:18:50:37 UT
No information found about the number of stars in the star catalog for srclist
region.
Found 5 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.99 mag. Found 119 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 15% of the
Genie image region.
Genie image analysis:
Found 14726.0 counts in the large background region of 6196.0 pixels or a rate
of 2.377 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 19.25 mag. for a
4-arcsec aperture. The closest Genie source has ra= 39.7685 dec= 33.5879
mag=16.91 sep=43.25".
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?
724445442 867 U srclist data are not available.
724445442 867 U image found no candidates.
List afterglow candidates for other finding charts.
724444765 190 ? srclist data are not available.
724444765 190 U image found no candidates.
------- Tokens for Quick GCN -------