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

D.8. BATFFTIMAGE 139
(signifmap=“NONE”) [string ]
Optional output file name for the significance map based on the theoretical Poisson variance
map (see ‘bkgvarmap’ for restrictions). A value of NONE indicates no significance maps
should be created. A value of APPEND indicates that each significance map should be
appended to the output file given by ‘outfile’.
(oversampx = 2) [integer ]
Oversampling factor of image in X direction. Finer sampling may allow peaks which straddle
pixel boundaries to be detected, but of course will result in increased compute time and disk
storage.
(oversampy = 2) [integer ]
Oversampling factor of image in Y direction.
(maskoffx = 0.0) [real ]
Translational offset to apply to the mask along the BAT X coordinate from its nominal design
position.
(maskoffy = 0.0) [real ]
Translational offset to apply to the mask along the BAT Y coordinate from its nominal design
position.
(maskoffz = 0.0) [real ]
Translational offset to apply to the mask along the BAT Z coordinate from its nominal design
position.
(rebalance = YES) [boolean ]
If YES, then the detector and aperture maps will be adjusted so that their additive means
are zero. If NO, then, the maps will be used unadjusted. (NOTE: pcodemap implies rebalance=NO)
(pcodemap = “NO”) [string ]
Partial coding map output setting. The possible values are:
“NO” No partial coding maps are output (although they may be computed internally,
depending on the required corrections).
“YES” Only the partial coding map is output.
“APPEND ALL” Append each partial coding map to the output.
“APPEND LAST” Append only the last partial coding map to the output.
• Note that if the spacecraft attitude changes between sequential input images, then the coordinate
system attached to the partial coding map will also change. Use APPEND ALL in
this case. If the spacecraft attitude is known to be fixed (for example, if each image is taken
at the same time, but in different energy bands), then APPEND LAST will append only one
partial coding map, and thus save space.
(pcodethresh = 0.01) [real ]
Minimum allowable partial coding value in the partial coding map. This is a fraction between
0.0 (no partial coding) and 1.0 (fully coded). The default of 0.01 implies that at least 1%
of the detectors must be illuminated. Values below the threshold will be set to zero in the
partial coding map.