Bonnarel
commented
1 year ago From John Tobin
s_resolution_beam_dirty - it is unclear what is intended here, whether it's to be a map of the dirty beam or the resolution of the dirty beam. If it's the resolution, this is somewhat redundant because the resolution of a cleaned map is derived from a Gaussian fit to the central core of the dirty beam, and there would be a degeneracy with what is provided by s_resolution. The dirty beam image, or psf image as CASA refers to it, is not always archived. ALMA and the NRAO do not include it in their standard image products for instance, so it is unclear how readily available this information would be for most archives.
From François Bonnarel :
Obviously the idea was to add a FIELD containing a link to the dirty beam map. The idea was to display it to help the user to figure out the level of quality of data. And this not a queryable column of course.
kettenis
From John Tobin
s_resolution_beam_dirty - it is unclear what is intended here, whether it's to be a map of the dirty beam or the resolution of the dirty beam. If it's the resolution, this is somewhat redundant because the resolution of a cleaned map is derived from a Gaussian fit to the central core of the dirty beam, and there would be a degeneracy with what is provided by s_resolution. The dirty beam image, or psf image as CASA refers to it, is not always archived. ALMA and the NRAO do not include it in their standard image products for instance, so it is unclear how readily available this information would be for most archives.