The Arecibo 5 GHz Mini-Gregorian Feed System: Spectral Line Performance
Abstract
The Mini-Gregorian Feed System at the Arecibo Observatory allows the highest resolution observations at 5 GHz of any single-dish radio telescope in the world. This system is a small-scale test instrument for the full Gregorian Upgrade which is currently in progress at Arecibo. In this paper we describe the performance of the Mini-Gregorian Feed in the 4.4-5.1 GHz range. This spectral range is important in radio astronomy for a number of reasons (e.g., one of the original VLA bands is at 6 cm). From a spectral line perspective, this band is important because of the presence of the 1_10-1_11 transition of formaldehyde, a standard medium-density molecular cloud tracer. (SECTION: Instrumentation and Data Analysis)
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- August 1993
- DOI:
- 10.1086/133251
- Bibcode:
- 1993PASP..105..894M
- Keywords:
-
- Astronomical Observatories;
- Radio Astronomy;
- Spectral Bands;
- Telescopes;
- Absorption Spectra;
- Formaldehyde;
- High Electron Mobility Transistors;
- Molecular Clouds;
- Radio Telescopes;
- Instrumentation and Photography;
- INSTRUMENTATION: MISCELLANEOUS