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

86 APPENDIX B. BAT FITS KEYWORDS
• FFAPP - a boolean keyword indicating whether the image, mask weights or fluxes have been
corrected for geometric projection effects. Set by: batfftimage, batmaskwtimg, batmaskwtevt.
Used by: NONE.
• FLUXMETH - a string keyword which indicates what kind of flux extraction method
was used. Allowed values are ‘RAW’ (pure unsubtracted counts); or ‘WEIGHTED’ (maskweighted
light curve or image = background-subtracted). Set by: batfftimage,batbinevt.
Used by: batdrmgen.
• GAINAPP - a boolean keyword indicating whether BAT energy calibration has been applied.
Set by: bateconvert, baterebin. Used by: bateconvert, batdrmgen.
• GAINMETH - a string keyword indicating what kind of BAT energy calibration was performed.
Allowed values are: ‘LINEAR’ (linear ADU to energy conversion); QUADRATIC
(quadratic ADU to energy conversion); ‘CUBIC’ (cubic ADU to energy conversion); ‘DI-
RECTCUBIC’ (obsolete); ‘FIXEDDAC’ (cubic ADU to energy conversion at fixed DAC level).
Set by: bateconvert, baterebin. Used by: batdrmgen, baterebin.
• IMATYPE - a string indicating the type of image produced. Allowed values are: ‘IN-
TENSITY’ (rate map); ‘EXPOSURE’ (partial coding / vignetting map); ‘SIGNIFICANCE’
(signal-to-noise map); ‘BACKGROUND’ (mean background map); ‘VARIANCE’ (variance
map); ‘ERROR’ (standard deviation map). Set by: batfftimage, batcelldetect. Used by:
NONE.
• MSKWTAPP - a boolean keyword indicating whether the image, mask weights or fluxes
have been normalized by the efficiency of the mask weighting algorithm. Set by: batfftimage,
batmaskwtimg, batmaskwtevt. Used by: NONE.
• MSKWTSQF - a floating point keyword recording the half-variance of the mask weights.
Set by: batfftimage, batmaskwtimg, batmaskwtevt, batupdatephakw. Used by: batdrmgen.
• NGOODPIX - an integer keyword recording the number of enabled detectors (pixels). Set
by: batfftimage, batmaskwtimg, batmaskwtevt, batupdatephakw. Used by: NONE.
• NGPIXAPP - a boolean keyword indicating whether the image, mask weights or fluxes have
been normalized by the number of enabled detectors. Set by: batfftimage, batmaskwtimg,
batmaskwtevt. Used by: NONE.
• OVERSMP{X,Y} - an integer keyword recording the oversampling factor used in the image
in the BAT X and BAT Y directions. Set by: batfftimage. Used by: batcelldetect.
• OCCAPP - a boolean keyword indicating whether the image has been corrected for occultation
by the earth, moon or sun. Set by: batoccultmap. Used by: batoccultmap.
• OCCTYPE - a string keyword indicating how the image was corrected for occultation.
Allowed values: ‘DIVIDE’ if the image was divided by the fractional exposure; ‘MULTIPLY’
if the image was multiplied by the fractional exposure. Set by: batoccultmap. Used by:
NONE.
• PCODEAPP - a boolean keyword indicating whether the image, mask weights, or fluxes
have been corrected for partial coding. Set by: batfftimage, batmaskwtimg, batmaskwtevt.
Used by: NONE.
• PCODEFR - a floating point keyword recording the partial coding fraction for a given
source in the BAT field of view (a number between zero and one). Set by: batmaskwtevt,
batmaskwtimg, batupdatephakw. Used by: NONE