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

112 APPENDIX D. BAT SOFTWARE TOOL REFERENCE
(psffwhm=“0.37413”) [string ]
Full-width at half maximum of the point spread function, in units of degrees. By default,
this is held fixed, but if “:FIT” is appended, then the width is fitted. The default value listed
above applies to the BAT point spread function.
(psftopwidth=“0.04584”) [string ]
For the pyramidal point spread function, the full width of the top of the truncated pyramid,
in units of degrees. By default, this is held fixed, but if “:FIT” is appended, then the width
is fitted. The default value listed above applies to the BAT point spread function.
(newsrcname=“UNKNOWN”) [string ]
Name to be used for newly detected sources. This can be a C format string, whose interpretation
depends on the value of the newsrcind parameter. If newsrcind is greater than or
equal to zero, then newsrcname may contain a single “%d”-style C format code. Each new
source is given a unique source number, starting with index newsrcind. If newsrcind is -1,
then newsrcname may contain two “%f” C format codes for the RA and DEC position, in
degrees.
(newsrcind=1) [integer ]
Starting index number to be used to label new sources (see newsrcname). If -1, then sources
are labeled by their position on the sky.
(signifmap=NONE) [string ]
Optional output file name for the significance map.
(bkgmap=NONE) [string ]
Optional output file name for the mean background map.
(bkgvarmap=NONE) [string ]
Optional output file name for the background fluctuation map.
(inbkgmap=NONE) [string ]
Optional background map which overrides the internally-calculated background. The map or
maps must have exactly the same structure and number of images as the input image file. If
inbkgmap=ZERO, then the background is explicitly set to zero in the source detection stage.
(inbkgvarmap=NONE) [string ]
Optional background variation map which overrides the internally-calculated variation map.
The map or maps must have exactly the same structure and number of images as the input
image file.
(distfile=CALDB) [string ]
The ‘distfile’ parameter should point to a FITS file containing an MxNx2 image (or CALDB
to use the default instrument correction in the calibration database). The two planes of the
image are the non-linear distortion of the BAT “plate scale” as a function of position in the
sky image. The values are offsets in tangent plane coordinates (IMX,IMY), and therefore
unitless. The first plane of the image cube is the IMX offset, and the second plane is the
IMY offset. The sense of the offset is (TRUE-APPARENT), i.e. for a measured position in
tangent plane coordinates, the offset values should be *added* to arrive at the true position
in tangent plane coordinates. The images are low-resolution versions of the BAT field of view