The SWIFT BAT Software Guide Version 6.3 30 ... - HEASARC - Nasa

D.2. BATCELLDETECT 111
(nullborder=NO) [boolean ]
Allow sources which fall on the border of the image? If no, then sources whose “source
window” overlaps with the edge of the image are ignored. The edge of the image is defined
by the partial coding threshold. These sources may still appear in the output catalog with a
DETECT STATUS value of -3.
(bkgwindowtype=“circle”) [string ]
Background window type, one of “circle” or “square”.
(bkgradius=30) [integer ]
Background window radius in pixels. For a window of “circle”, the bkgradius parameter is
the radius of the circle. For a “square” window, the bkgradius is the half-width of the square.
Actual diameter of circle or square is 2*bkgradius+1.
(regionfile=NONE) [string ]
Optional name of source detection region file. Upon output, sources listed in the outfile
catalog are also written to a standard “region” file, which can then be read into image display
programs such as fv/POW or SAO ds9. Output units are degrees. The radius of the circle is
twice the PSF gaussian sigma radius.
(srcradius=6) [integer ]
Source radius in pixels. If 0, then the full background window is used to estimate the background
and its standard deviation. Actual diameter of circle or square is 2*srcradius+1.
(srcdetect=YES) [boolean ]
If srcdetect is set to “YES”, then batcelldetect will attempt to detect new sources. If “NO”,
then source detection is disabled, but source fitting of previously cataloged sources may still
be performed (depending on the value of ‘srcfit’).
(srcfit=YES) [boolean ]
If srcfit is set to “YES”, then batcelldetect will fit newly detected and previously cataloged
sources (if any) as described above. If “NO”, then previously determined positions and
intensities are output. See “Fitting For Position and Flux” above.
(posfit=NO) [boolean ]
Posfit specifies whether batcelldetect fits the position ofalready known sources. See “Fitting
For Position and Flux” above.
(bkgfit=NO) [boolean ]
Fit the background for each source individually? If yes, then during the PSF fitting stage,
each source has an independent background level. If no, a fixed background is subtracted.
(psfshape=“GAUSSIAN”) [string ]
Shape of the point spread function to use. It should be one of “GAUSSIAN”, “PYRAMID” or
“TRUNCONE”. “GAUSSIAN” is a two-dimensional gaussian function (which more closely
matches the Swift/BAT point spread function in a single image); “PYRAMID” is a twodimensional
pyramidal frustum with a square base (no longer recommended); “TRUNCONE”
is a truncated cone (no longer recommended).