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Title:
Upper limits to the interstellar radiation field between 775 and 1050 A
Authors:
Paresce, F.; Bowyer, S.
Affiliation:
AA(California, University, Berkeley, Calif.), AB(California, University, Berkeley, Calif.)
Publication:
Astrophysical Journal, vol. 207, July 15, 1976, pt. 1, p. 432-435. (ApJ Homepage)
Publication Date:
07/1976
Category:
Space Radiation
Origin:
STI
NASA/STI Keywords:
Far Ultraviolet Radiation, Interstellar Radiation, Nightglow, Rocket Sounding, Ultraviolet Spectra, Background Radiation, Rocket-Borne Instruments, Sky Brightness, Spectroscopic Analysis
DOI:
10.1086/154511
Bibliographic Code:
1976ApJ...207..432P

Abstract

A 40-A resolution extreme-ultraviolet spectrometer, sensitive to radiation in the 775-1050 A band, was flown on a Black Brant VC rocket to measure the night sky brightness in this region of the electromagnetic spectrum. A weak signal above background was recorded in most channels as the spectrometer's field of view scanned the sky in the vicinity of the galactic plane from Monoceros to Andromeda. Because the earth's upper atmosphere may produce some radiation in this wavelength region, the possibility cannot be excluded that some or all of the observed signal is terrestrial in origin. However, observational upper limits can be established at the 95-per cent confidence level for the intensity of an extraterrestrial extreme ultraviolet background which ranges from 6 millionths erg/sq cm/s/sr/A at 1050 A to 4 ten-millionths erg/sq cm/s/sr/A at 775 A. These results are consistent with existing theoretical predictions.

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