Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mperp..41.....c&link_type=abstract
MPE Intern. Rep., No. 41, 55 pp.
Astronomy and Astrophysics
Astronomy
Balloon-Borne Instruments, Far Infrared Radiation, Fourier Transformation, Infrared Astronomy, Infrared Spectrometers, Liquid Helium, Fabry-Perot Spectrometers, Michelson Interferometers, Prototypes, Spacelab Payloads
Scientific paper
Mounting a prototype version of the helium cooled German Infrared Laboratory (GIRL) spacelab Fourier transform spectrometer (FTS) on a balloon borne 1 m infrared telescope, and on a three-axis stabilized platform is proposed. The Michelson FTS utilizes both outputs. A Fabry-Perot masking filter passes radiation to the FTS only in bands containing lines of astrophysical interest. The reduction of the telescope atmospheric background radiation by the masking filters, and elimination of internal radiation of the FTS due to its low temperature allow operation within the passband of each masking filter at a level where multiplex advantage is achieved over single resolution element spectrometers (Fabry-Perots, gratings) of generally attainable efficiency. An FTS seems to perform better than expected under high background conditions.
Campbell Marvin F.
Drapatz Siegfried
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