importfits – Convert an image FITS file into a CASA image – import/export task

Description

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 (0 == first)
default=-1 use the first valid one; 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

defaultaxes – Add the default 4D coordinate axes where they are missing; value True requires setting defaultaxesvalues
default=False, example: defaultaxes=True

defaultaxesvalues – List of values to assign to added degenerate axes when defaultaxes==True (ra,dec,freq,stokes)
For existing axes, empty strings can be given as values. For the directions and spectral values, any valid angle/frequency expressions can be given. default = [], example: defaultaxesvalues=[‘19h30m00’, ‘-02d30m00’, ‘88.5GHz’, ‘Q’]

beam – List of values to be used to define the synthesized beam [BMAJ,BMIN,BPA] (as in the FITS keywords)
default = [] (i.e.take from FITS file), example: beam=[‘0.35arcsec’, ‘0.24arcsec’, ‘25deg’]

Parameters

Title
Parameter	Default	Description
fitsimage	`''`
imagename	`''`
whichrep	`int(0)`
whichhdu	`int(-1)`
zeroblanks	`True`
overwrite	`False`
defaultaxes	`False`
defaultaxesvalues	`[ ]`
beam	`[ ]`

Parameter Explanations

fitsimage

''

Name of input image FITS file

imagename

''

Name of output CASA image

whichrep

int(0)

If fits image has multiple coordinate reps, choose one.

whichhdu

int(-1)

If its file contains multiple images, choose one (0 = first HDU, -1 = first valid image).

zeroblanks

True

Set blanked pixels to zero (not NaN)

overwrite

False

Overwrite pre-existing imagename

defaultaxes

False

Add the default 4D coordinate axes where they are missing; value True requires setting defaultaxesvalues

defaultaxesvalues

[ ]

List of values to assign to added degenerate axes when defaultaxes==True (ra,dec,freq,stokes)

beam

[ ]

List of values to be used to define the synthesized beam [BMAJ,BMIN,BPA] (as in the FITS keywords)