Visibility-based continuum subtraction in spectral line observations with radio synthesis telescopes

Details Visibility-based continuum subtraction in spectral line observations with radio synthesis telescopes Visibility-based continuum subtraction in spectral line observations with radio synthesis telescopes

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...239l...5v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 239, no. 1-2, Nov. 1990, p. L5-L8.

Astronomy and Astrophysics

Astronomy

19

Radio Astronomy, Radio Telescopes, Spectral Bands, Astronomical Spectroscopy, Image Processing, Infrared Stars, Visibility

Scientific paper

The shortcomings of two methods used currently for subtracting the continuum background from spectral line experiments with radio interferometers (i.e., subtracting in the image domain and subtracting in the UV data domain) are discussed, and a new method is proposed. In this method, the continuum background is subtracted by averaging and subtracting ungridded visibilities across the spectrum. It is shown that, in some cases, this method is faster and can produce more accurate results than the conventional methods.

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