Far-Infrared Observations of the Night Sky

Details Far-Infrared Observations of the Night Sky Far-Infrared Observations of the Night Sky

Jun 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969sci...164.1271h&link_type=abstract

Science, Volume 164, Issue 3885, pp. 1271-1273

Physics

11

Scientific paper

We have flown a telescope cooled to liquid-helium temperatures and made far-infrared observations of the night sky. A gallium-doped germanium detector, sensitive from 5.2 to 130 micrometers, detected a minimum signal of 10-9 watt per square centimeter per steradian referred to 100 micrometers. The origin of this signal can be instrumental, atmospheric, interplanetary, or interstellar. We can place a firm upper limit on the color temperature of a dilute cosmic background flux.

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