ADDRMF (Jun94) ftools.caltools ADDRMF (Jun94)
ADDRMF -- Add together RMFs
addrmf [file1,file2,..] [wt1,wt2,...] [rmffile=]
ADDRMF adds together two or more RMFs. A weighting factor may be
applied to each input RMF. To average RMFs, total weights should
add up to 1.0. To add RMFs, each individual weight should be 1.0.
The header and energy bounds extensions are copied from the first
input RMF. Some checking is done to ensure that compatible
RMFs are added however thought is advised before using this tool.
The input to this parameter can either be a list of RMF files,
or can be the name of an ASCII file containing such a list
of files (one per line) and weighting factors for the RMFs.
Note that for long parameter values (e.g. high precision
weights), parameter values read from the command line are
limited to 1024 chars and an ASCII file should be used instead
if parameter lengths may exceed this number. Each line of the
file should contain the RMF name followed by a real number
giving the weighting to be applied to this RMF in the
summation. In case of, an ascii file is used, the name of
the ASCII file should be preceeded by a, '@' (eg
@file_list instructs the task to open the ASCII file
file_list, and read the RMF filenames from it). The number
of RMF files cannot exceed 2500.
Weighting factors for the RMFs given via the list
parameter. User is asked for this parameter when name of
RMFs are given and not the ascii file. The number of
values and ordering MUST be the same as for the filenames
specified by the list parameter. The input to this parameter
is a list of reals.
The name of the output RMF file.
If clobber = yes then overwrite the RMF file if a file of this
name already exists.
Add together the RMFs foo.rmf and goo.rmf with equal weighting and
write the answer to hoo.rmf. First create file.list containing :
ca> addrmf @file.list hoo.rmf
ca> addrmf foo.rmf,goo.rmf 0.5,0.5 hoo.rmf
When adding together responses from different detectors (for
example individual PCU in the RXTE PCA), use a weight of 1.0 for
each individual file. This is required for the following reason:
One detector receives X counts, so N detectors receive N*X counts.
The matrix for one detector has approximately 1400 cm^2. So the
matrix for a combined PHA spectrum with N*X counts must have
approximately N*1400 cm^2.
ca> addrmf pcu0.rmf,pcu1.rmf,pcu3.rmf 1.0,1.0,1.0 pcu_013.rmf
Page author:Michael F. Corcoran
Last Update: Thursday, 19-Apr-2012 16:01:40 EDT