The Queen Mary College/University of Oregon photometer for submillimetre continuum observations
1984; Pergamon Press; Volume: 24; Issue: 4 Linguagem: Inglês
10.1016/0020-0891(84)90033-2
ISSN1878-1160
AutoresP. A. R. Ade, M. J. Griffin, C. T. Cunningham, J. V. Radostitz, S. Predko, I. G. Nolt,
Tópico(s)Meteorological Phenomena and Simulations
ResumoRecent advances in FIR detection and filter technology form the basis of a new multiband submillimetre photometer. The instrument provides a selection of filters to match the atmospheric transmission windows between 300 μm and 1.4mm wavelength, and uses a composite Ge bolometric detector cooled by 3He cryogenics to 0.35 K. It is designed primarily for use at the f/35 focus of the United Kingdom Infrared Telescope (UKIRT) and, in common with user instruments, is mounted on the UKIRT multiport photometer cage. This configuration allows use of the chopping secondary mirror for sky cancellation and of the TV optical system for either on- or off-axis guiding. Further, IR to millimetre wavelength coverage can be achieved in a single night by the use of several common focus photometers. Under good atmospheric conditions, the system achieves a noise-equivalent flux density (NEFD) of about at 1.1 mm, and about 10 Jy Hz− at 400μm.‡ These figures represent the best sensitivities yet reported at these wavelengths.
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