imagePrimaryBeam

Return to directory of Todd's CASA extensions

Reads the frequency from an image (CASA or FITS) and returns the primary beam FWHM in arcsec. Reads the observatory name and consults a table of antenna sizes (ACA, ALMA, SMA, VLA). See also imageAntennaDiameter and imageObservatory.

Usage:

au.imagePrimaryBeam(img, header='',  returnRadiusInPixels=True, fwhmfactor=None, verbose=False)
Inputs:
  • header: dictionary output by imhead(mode='list'); if blank then this command will be run
  • returnRadiusInPixels: if True, then also return the radius of the beam in pixels
  • fwhmfactor: passed to primaryBeamArcsec
  • verbose: if True, then show the frequency read from the header
Returns:
  • FWHM of primary beam in arcsec (and optionally in pixels)

Example:

CASA <17>: au.imagePrimaryBeam('calibrated_NGC_1068.ms_spw2_imagesub.tclean.mask')
  Out[17]: (17.036020070084064, 327.6157705785397)

-- ToddHunter - 2016-01-27
Topic revision: r1 - 2016-01-27, ToddHunter
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