|AHELP for CIAO 4.9||
Write a PHACrateDataset to a file.
write_pha(pha, filename [, clobber=False])
|pha||The PHACrateDataset object to write out.|
|filename||The output file name. To change the format from FITS add a kernel specifier as described in 'ahelp dmopt' and 'ahelp dmascii'.|
|clobber||Set to True if the output file already exists and you wish to over-write it, since the default behavior is to raise an IOError in this case.|
The write_pha command creates an output file for the input PHACrateDataset.
As discussed in ahelp read_file, the Crate and Crate Dataset objects do not retain all the information from the input file.
>>> pha = read_pha("pha.fits") >>> cr = pha.get_crate("SPECTRUM") >>> pi = get_colvals(cr, "PI") >>> flag = (pi > 10) & (pi < 700) >>> cd = CrateData() >>> cd.name = "QUALITY" >>> cd.values = 1 * flag >>> add_col(cr, cd) >>> write_pha(pha, "pha_qual.fits", clobber=True)
Here we add a QUALITY column to the SPECTRUM block; setting rows to 1 for those PI bins greater than 10 and less than 700, otherwise 0. The resulting file - including all the blocks in pha.fits - is written out to pha_qual.fits.
See the bug pages on the CIAO website for an up-to-date listing of known bugs.
Refer to the CIAO bug pages for an up-to-date listing of known issues.