exportfits – Convert a CASA image to a FITS file – import/export task

Description

CASA-produced images can be exported as FITS files for transporting to other software packages or publication. No subimaging of the fits image can be made with this task. The spectral reference frame can be changed prior to export using the task imreframe.

Parameters

Title
Parameter	Default	Description
imagename	`''`	Name of input CASA image
fitsimage	`''`	Name of output image FITS file
velocity	`False`	Use velocity (rather than frequency) as spectral axis
optical	`False`	Use the optical (rather than radio) velocity convention
bitpix	`int(-32)`	Bits per pixel
minpix	`int(0)`	Minimum pixel value (if minpix > maxpix, value is automatically determined)
maxpix	`int(-1)`	Maximum pixel value (if minpix > maxpix, value is automatically determined)
overwrite	`False`	Overwrite output file if it exists?
dropstokes	`False`	Drop the Stokes axis?
stokeslast	`True`	Put Stokes axis last in header?
history	`True`	Write history to the FITS image?
dropdeg	`False`	Drop all degenerate axes (e.g. Stokes and/or Frequency)?

Parameter Explanations

imagename

''

Name of input CASA image: Default: none

Example: fitsimage=’3C273XC1.image’

fitsimage

''

Name of output image FITS file: Default: none

Example: fitsimage=’3C273XC1.fits’

velocity

False

Use velocity (rather than frequency) as spectral axis: Default: False Options: False|True

optical

False

Use the optical (rather than radio) velocity convention: Default: False Options: False|True

bitpix

int(-32)

Bits per pixel: Default: -32

Example: bitpix=16

minpix

int(0)

Minimum pixel value (if minpix > maxpix, value is automatically determined)

maxpix

int(-1)

Maximum pixel value (if minpix > maxpix, value is automatically determined)

Default: -1

overwrite

False

Overwrite output file if it exists?: Default: False Options: False|True

dropstokes

False

Drop the Stokes axis?

stokeslast

True

Put Stokes axis last in header?: Default: True Options: True|False

history

True

Write history to the FITS image?: Default: True Options: True|False

dropdeg

False

Drop all degenerate axes (e.g. Stokes and/or Frequency)?: Default: False Options: False|True