An F/20 millimeter photometer for TIRGO
Abstract
A new instrument for the detection of the millimeter radiation, mounted at the 1.5 m, F/20 infrared telescope (TIRGO), is described. The photometer uses a composite GaGe bolometer and an uncooled optical system. Jupiter, Mars and Saturn are used as calibration standards. The high precipitable water vapour content (w approximately equal to 6 mm) measured during the observations (late April 1982) and the strong atmospheric noise limits the expected sensitivity. The molecular cloud W 49 was detected at a level of approximately 3-5 sigma with a flux density of approximately 1128 Jy (wavelength equals 1 mm; Beam size equals approximately 6 arcmin/HPBW/).
- Publication:
-
ESO Infrared Workshop
- Pub Date:
- 1982
- Bibcode:
- 1982esoi.work...81M
- Keywords:
-
- Astronomical Photometry;
- Infrared Telescopes;
- Millimeter Waves;
- Photometers;
- Atmospheric Effects;
- Bolometers;
- Calibrating;
- Design Analysis;
- Molecular Clouds;
- Astronomy