image overlap message for exposure 1 of trigger 1200812
uvot_overlap.pl vrs. 2010-12-20b fem started at 231206d00h47m34s669616usUT
The observation of trigger 1200812 started 2023-12-05T16:48:29.0
Examining file ./1200812_g268_uvot_sky_image.fits
The exposure ID is 723487708
The exposure time is 149.857 (seconds)
The filter is WHITE.
*** Warning -- found 4860 null pixels in the image.
The uvot region is centered at (54.1483,27.1458) with a roll angle of 282.6
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 (54.1540,27.1460) with a radius of 3.000 arc min
This is 0.306 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (54.1487,27.1413) with a radius of 0.033 arc min
This is 0.268 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1200812
find_uvot_ag.pl vrs. 2023-04-25a fem started at 231206d00h47m36s660906usUT
Observation start time is 2023-12-05T16:48:29.0
Examining file ./1200812_g268_uvot_catalog_image.fits
The exposure ID is 723487708
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 5 detected source(s) for 1200812_g268
Aspect correction adds -0.00106 degrees (-0.255 sec of time = -3.40 arc sec) to RA
Aspect correction adds 0.00080 degrees ( 2.88 arcsec) to Dec
Total aspect correction is 4.46 arcsec
Star catalogs centered at 54.1475 , 27.1496 with radius 2.40 arc min.
n_usno: 72 n_gsc: 69
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 5 matched entries is 0.419" for 1200812_g268
Mean and std. dev of mag. difference (MAG_DELTA) are 0.792 and 0.260 for 1200812_g268
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1200812_g268.
Acceptable entries have no ID, XRT distances < 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=54.1540 (03:36:36.96) DEC=27.1460 (+27:08:45.6)
XRT distances are from RA=54.1487 (03:36:35.70) DEC=27.1413 (+27:08:28.8)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 69405.328 counts in the bkg source region of 5973.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 11.620 counts/pixel (5-sig UL in 4" is 20.02 mag) for 1200812_g268
There are 2359.5493 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 11.857 counts/pixel for 1200812_g268
There are 13937.887 counts in the xrt_bkg source region of 1194.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 11.673 counts/pixel (5-sig UL in 4" is 20.02 mag) for 1200812_g268
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 20.57, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1200812_723487708_231206d00h47m36s660906usUT_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(54.1483,27.1458,45")
fk5;-circle(54.1480223351222,27.1512638144545,6")
fk5;-circle(54.1480454770565,27.1551417296763,6")
fk5;-circle(54.1410720836386,27.140227313119,6")
Region file: 1200812_723487708_231206d00h47m36s660906usUT_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(54.14875,27.14133,8")
Region file: 1200812_723487708_231206d00h47m36s660906usUT_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(54.14875,27.14133,25")
fk5;-circle(54.14875,27.14133,15")
fk5;-circle(54.1410720836386,27.140227313119,6")
image paragraph message for exposure 1 of trigger 1200812
------ Start for Possible Stand-alone Circular ----
In response to GRB231205 (Swift/BAT trigger 1200812) at 16:43:59 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 236 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 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.204.
------- notes for trigger 1200812 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 231206d00h47m39s501759usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1200812
-expid=723487708 -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/1200812/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 723487708.9621 or about 2023:339:16:48:23 UT
Found 449 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 41 sources in
srclist catalog. Found 11 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
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 20.57 mag. Found 69 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 8% of the
Genie image region. The Genie image is INCOMPLETE with 4860 null pixels.
Genie image analysis:
Found 69405.3 counts in the large background region of 5973.0 pixels or a rate
of 11.620 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 19.84 mag. for a
4-arcsec aperture.
Found 2359.5 counts in the XRT position region of 199.0 pixels or a rate of
11.857 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.243 +/- 0.349 (1-sigma) cps or
21.14 mag and a range from 20.17 to 99.99 mag. The 3-sigma UL at the XRT
position is 1.292 cps or 19.33 mag. The closest srclist source has ra= 54.1478
dec= 27.1514 mag=19.51 sep=36.45". The closest Genie source has ra= 54.1411
dec= 27.1402 mag=19.94 sep=24.92".
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?
723487708 236 WHITE srclist found no candidates.
723487708 236 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 27.14133
GRB_ERROR: 5
GRB_RA: 54.14875
IMAGE_START_TIME: 16:48:23
MAGNITUDE: 19.3
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT