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Balloon Measurements of the Far-Infrared Background Radiation

Dirk Muehlner and Rainer Weiss

  • Department of Physics and the Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

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Phys. Rev. D 7, 326 – Published 15 January, 1973

DOI: https://doi.org/10.1103/PhysRevD.7.326

Abstract

Measurements in five different passbands in the spectral region below 20 cm−1 have been made with a liquid-helium-cooled radiometer in two flights at approximately 40-km altitude. The equivalent temperatures are 2.7−0.2+0.4, 2.8±0.2, 2.8±0.2, ≤2.7, ≤3.4°K in passbands of 1 to 5.4, 7.8, 7.9, 11.1, and 18.5 cm−1. The results are consistent with a 2.7°K thermal radiation background. Atmospheric radiation of uncertain magnitude dominates the region above 11 cm−1.

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Phys. Rev. D 7, 326– Published 15 January, 1973
  • Received 2 March 1972

© 1973 American Physical Society

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