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

D.5. BATDRMGEN 127
of interest. If “NONE” is specified, batdrmgen uses the values specified by the hv def and
vthr def parameters.
• At present, batdrmgen uses this file simply to check the hv values, make certain they are
nominally 200V, and warn the user if they are not. Therefore, the default value of “NONE”
is perfectly acceptable.
(row = 1) [integer ]
If the input PHA file is a “Type II” spectrum (one spectrum per row of the PHA file), the
row parameter specifies which row of the file contains the spectrum for which a response
matrix is computed. For a “Type I” spectrum (single spectrum extension) the row parameter
is ignored, but should be set to 1.
(calfile = CALDB) [filename ]
Name of the FITS file that contains the spectral parameters for the response function. The
default value is “CALDB” thus allowing the file to be managed by the CALDB utility.
(depthfile = CALDB) [filename ]
Name of the FITS file that contains the compressed photon interaction depth distribution
generated by Monte Carlo simulations. The default value is “CALDB” thus allowing the file
to be managed by the CALDB utility.
(escale = CALDB) [string ]
Desired form of the incident photon energy bin edges. Possible responses include:
“FILE” the program reads in a FITS file containing the bin edges (see description of the
efile parameter below);
“LIN” linear binning
“LOG” logarithmic binning.
• Both LIN and LOG allow the user to specify the number of bins (see nphoton bins below)
and the energy range (see elimit lo and elimit hi listed below. )
(detmask = NONE) [string ]
Name of a “mask weight” map (with dimensions of 286x173) which indicates which detectors
were used to accumulate the spectrum. At present, this parameter is not used.
(method = MEAN) [string ]
Computation method for DRM. The default method (“MEAN”) accesses calibration parameters
that are averaged over the entire BAT FOV. The alternative method is “TABLE”, in
which batdrmgen accesses a table of calibration parameters for different source positions and
sorts the table with respect to the angular separation between the source direction vector and
the position vector for each ground calibration measurement. batdrmgen then calculates the
weighted average of the parameter values from the three closest calibration measurements.
Thus, the ground calibration parameters from measurements closer to the source position will
be weighted more heavily.
(flight data = YES) [boolean ]
Flag indicating whether the PHA file contains flight data as opposed to ground calibration
data.