Convert an image FITS file into a CASA image:
Keyword arguments:
fitsimage -- Name of input image FITS file
default: none; example='3C273XC1.fits'
imagename -- Name of output CASA image
default: none; example: imagename='3C273XC1.image'
whichrep -- If fits image has multiple coordinate reps,
choose one.
default: 0 means first; example: whichrep=1
whichhdu -- If fits file contains multiple images,
choose this one
default=0 mean first; example: whichhdu=1
zeroblanks -- Set blanked pixels to zero (not NaN)
default=True; example: zeroblanks=True
overwrite -- Overwrite pre-existing imagename
default=False; example: overwrite=True