NAME

fbsub -- Subtracts a baseline (unpulsed contribution) from an fB histogram.

USAGE

        fbsub infile outfile phasemin phasemax clobber

DESCRIPTION

fbsub allows the user to specify one or two phase ranges that are considered to be free of pulsed signal, and to use these to determine the background, or baseline (unpulsed), spectrum. This spectrum is then subtracted from the counts stored in the fB file to yield a background- subtracted pulsed lightcurve/spectrum two-dimensional histogram.

Input is an fB file; output is an fB file, too. It does not hurt to apply fbsub multiple times, though it does not do much good, either: the result is the same as when the last fbsub run was performed directly on the original input fB file. Errors are propagated rigourously.

PARAMETERS

infile [string]

Name of the input fB file (produced by fasebin).

outfile = fBsub.pha [string]

Name of the baseline-subtracted fB file.

phasemin = 0.0 [double]

With phasemax, sets the range of phases to be used to determine the unpulsed contribution.

phasemax = 1.0 [double]

With phasemin, sets the range of phases to be used to determine the unpulsed contribution. phasemax should be greater than phasemin and may exceed 1.0.

(phasemin2 = -100.0) [double]

With phasemax2, sets an optional second range of phases to be used to determine the unpulsed contribution. Negative value indicates that no second range is to be used.

(phasemax2 = -100.0) [double]

With phasemin2, sets an optional second range of phases to be used to determine the unpulsed contribution. phasemax2 should be greater than phasemin2 and may exceed 1.0.

(clobber = yes) [boolean]

Should a pre-existing output file be overwritten?

(mode = ql) [string]

FTOOLS internal -- users should not need to change.

EXAMPLES

NOTES:

See the help file for FASEBIN for details.

BUGS

SEE ALSO

FASEBIN FBADD FBFSUM FBSSUM

CATEGORY