Search for extragalactic backgrounds - A balloon-borne 4-band FIR differential photometer with large throughput

Details Search for extragalactic backgrounds - A balloon-borne 4-band FIR differential photometer with large throughput Search for extragalactic backgrounds - A balloon-borne 4-band FIR differential photometer with large throughput

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...226..357m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 226, no. 1, Dec. 1989, p. 357-365. Research supported by CNR and MPI.

Astronomy and Astrophysics

Astronomy

2

Balloon-Borne Instruments, Extragalactic Radio Sources, Extraterrestrial Radiation, Infrared Photometry, Relic Radiation, Diffuse Radiation, Infrared Astronomy Satellite, Radiation Detectors, Signal Processing

Scientific paper

A large beam, four-band differential IR photometer with a large throughput was developed in order to increase the sensitivity of the instrument to diffuse radiation. The goal is to search for diffuse emission from extragalactic sources. The wavelength region covered the range from 100 to 1000 microns. The experiment was flown on a stratospheric balloon on July 29, 1987, collecting data for about 15 hours. Here, the apparatus and the calibrations performed before and during the flight are described, together with a preliminary analysis of the data. The scan of a high galactic latitude region makes it possible to set an upper limit for the sky roughness at an effective wavelength of 710 microns, for intensity fluctuations at an angular scale of 11 deg, with an 8.5-deg beam size. The upper limit set at 1 standard deviation is about 1 percent of the submillimeter emission detected in a recent rocket experiment in the same wavelength range.

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