image overlap message for exposure 2 of trigger 1143281
uvot_overlap.pl vrs. 2010-12-20b fem started at 221204d10h55m16s186502usUT
The observation of trigger 1143281 started 2022-12-04T10:51:09.7
Examining file 1143281_g363_uvot_sky_image.fits
The exposure ID is 691843869
The exposure time is 18.757 (seconds)
The filter is U.
The uvot region is centered at (299.6011,35.1845) with a roll angle of 226.6
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 (299.5290,35.0050) with a radius of 3.000 arc min
This is 11.334 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
The XRT error circle is centered at (299.5354,35.0978) with a radius of 0.088 arc min
This is 6.117 arc min from the center of the uvot region
The area of the XRT error circle is 0.025 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 1143281
find_uvot_ag.pl vrs. 2020-10-30 fem started at 221204d10h55m53s496814usUT
Observation start time is 2022-12-04T10:51:09.7
Examining file 1143281_g363_uvot_catalog_image.fits
The exposure ID is 691843869
The exposure is 18.757 sec.
The bin size is 2 pixels
The filter is U
There are 19 detected source(s) for 1143281_g363
Aspect correction adds -0.00220 degrees (-0.529 sec of time = -6.49 arc sec) to RA
Aspect correction adds 0.00052 degrees ( 1.89 arcsec) to Dec
Total aspect correction is 6.76 arcsec
Star catalogs centered at 299.5990 , 35.1843 with radius 2.60 arc min.
n_usno: 310 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 8.919
RA DEC Mag Color
bright star 0: 299.59032 (19:58:21.68) 35.20161 (+35:12:05.8) 8.92 USNO-V
bright star 1: 299.62599 (19:58:30.24) 35.16512 (+35:09:54.4) 11.43 USNO-V
bright star 2: 299.59017 (19:58:21.64) 35.21686 (+35:13:00.7) 10.03 USNO-V
Mean distance difference (CAT_DELTA) for 11 matched entries is 0.640" for 1143281_g363
Mean and std. dev of mag. difference (MAG_DELTA) are 1.969 and 1.562 for 1143281_g363
Found 8 entries without IDs and 0 entries that are acceptable afterglow candidates for 1143281_g363.
Acceptable entries have no ID, XRT distances < 13.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
6 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=299.5290 (19:58:06.96) DEC=35.0050 (+35:00:18.0)
XRT distances are from RA=299.5354 (19:58:08.50) DEC=35.0978 (+35:05:52.1)
*** WARNING 42 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 3:
ra=299.60177 dec= 35.17349 +/- 0.7" mag=15.96+/-0.17 dist=335.2 REFID=19 flag=0
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 3793.8950 counts in the bkg source region of 5917.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 0.641 counts/pixel (5-sig UL in 4" is 17.89 mag) for 1143281_g363
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 18.45, XRT distances < 13.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1143281_691843869_221204d10h55m53s496814usUT_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(299.6011,35.1845,45")
fk5;-circle(299.601772619983,35.1734930101951,6")
fk5;-circle(299.594245484636,35.1800989021451,6")
fk5;-circle(299.593077685761,35.1934723960195,6")
fk5;-circle(299.61752510282,35.1870321971875,6")
fk5;-circle(299.601293027581,35.1983739281454,6")
fk5;-circle(299.606858688016,35.1963834974,6")
Region file: /Home/eud/uvot_tdrss/swift/uvot_gcn/src_1143281_XRT.reg
# Region file format: DS9 version 3.0
# find_uvot_ag.pl vrs. 2020-10-30 fem XRT
global font="helvetica 12 bold" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source=1
fk5;circle(299.53542,35.09781,5.30") # color=red dash=0
point(299.53322,35.09833) # point=diamond 10 color=red width=2
image paragraph message for exposure 2 of trigger 1143281
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.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB221204 (Swift/BAT trigger 1143281) at 10:45:05 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 19 seconds with the U filter starting
333 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 large, but
uncertain, extinction expected.
------- notes for trigger 1143281 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 221204d10h56m00s595895usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1143281
-expid=691843869 -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/1143281/
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 691843869.70594 or about 2022:338:10:51:04 UT
No information found about the number of stars in the star catalog for srclist
region.
Found 19 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 18.45 mag. Found 306 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
31% of the Genie image region. The XRT position was OUTSIDE the star catalog
search region.
Genie image analysis:
Found 3793.9 counts in the large background region of 5917.0 pixels or a rate
of 0.641 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 17.74 mag. for a
4-arcsec aperture. The closest Genie source has ra= 299.6014 dec= 35.1626
mag=17.44 sep=303.49".
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?
691843869 333 U srclist data are not available.
691843869 333 U image found no candidates.
List afterglow candidates for other finding charts.
691843711 175 ? srclist data are not available.
691843711 175 WHITE image found no candidates.
------- Tokens for Quick GCN -------