Single-sideband calibration for CO, (13)CO, HCN, and CS lines near 345 GHz

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Photometry, Calibrating, Interstellar Matter, Line Spectra, Molecular Spectra, Radio Astronomy, Radio Spectra, Carbon Compounds, Carbon Monoxide, Hydrocyanic Acid, Imaging Spectrometers, Millimeter Waves, Radio Telescopes, Submillimeter Waves, Sulfur Compounds

Scientific paper

We present calibrated single-sideband spectra toward nine standard sources in CO J = 3 - 2, (13)CO J = 3 - 2, HCN J = 4 - 3, and CS J = 7 - 6 lines. These spectra were taken at the Caltech Submillimeter Observatory (CSO) 10.4 m telescope using a solid-state imaging spectrometer (SIS) receiver and a quasi-optical single-sideband filter. The image rejection of the single-sideband filter was 11 - 13 dB near 345 GHz. The spectra presented are meant to serve as standard calibrators for these lines.

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