Telescope and detector systems for sub-millimeter line spectroscopy

Details Telescope and detector systems for sub-millimeter line spectroscopy Telescope and detector systems for sub-millimeter line spectroscopy

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977infph..17..241r&link_type=abstract

Infrared Physics, vol. 17, July 1977, p. 241-244. ERDA-supported research.

Physics

Astronomical Spectroscopy, Line Spectra, Submillimeter Waves, Telescopes, Bandpass Filters, Noise Temperature, Phase Coherence, Point Sources, Receivers

Scientific paper

Comparisons are made between different receiver-telescope combinations used for submillimeter line spectroscopy. Equations are given for the noise equivalent flux (NEF) from a point source and the noise equivalent temperature (NET) from an extended source, for a receiver based on a filter and an incoherent detector. Equations are also given for the receiver noise temperature required for a heterodyne receiver to have comparable performance. Numerical results are given for realizable telescope parameters which point out the usefulness to submillimeter wave spectroscopy of locating a large millimeter wave telescope at a high dry site.

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