The Imperial College 41-inch telescope for far-infrared balloon astronomy

Details The Imperial College 41-inch telescope for far-infrared balloon astronomy The Imperial College 41-inch telescope for far-infrared balloon astronomy

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977opten..16..558j&link_type=abstract

Optical Engineering, vol. 16, Nov.-Dec. 1977, p. 558-562. Research supported by the Science Research Council of England.

Computer Science

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Balloon-Borne Instruments, Far Infrared Radiation, Infrared Astronomy, Telescopes, Balloon Sounding, Cassegrain Optics, Photometry, Radiant Flux Density, Saturn (Planet), Signal Processing, Venus (Planet)

Scientific paper

A 41-inch balloon telescope for far-infrared astronomical observations has been developed. It is constructed entirely of aluminum alloy, including the optics, and incorporates several novel features. Two composite bolometers, operated at 1.7 K, with adjacent fields of view on the sky, allow the carrying out of two-color photometry in the wavelength ranges 40-80 microns and 80-400 microns. In-flight calibration, based on detections of both Venus and Saturn, indicates that the far-infrared noise-equivalent flux density (areance) was approximately 130 Jy Hz to the -1/2 for the short wavelength channel and approximately 500 Jy Hz to the -1/2 for the long wavelength channel.

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