Concentration of Nightglow Hα-emission to the Ecliptic and the Radial Velocities of this Line

Details Concentration of Nightglow Hα-emission to the Ecliptic and the Radial Velocities of this Line Concentration of Nightglow Hα-emission to the Ecliptic and the Radial Velocities of this Line

Sep 1963

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1963natur.199..990s&link_type=abstract

Nature, Volume 199, Issue 4897, pp. 990 (1963).

Astronomy and Astrophysics

Astronomy

1

Scientific paper

DURING the winter of 1962-63 I examined the distribution of Ha-intensity over the night sky. A Fabry-Pérot étalon was used with a spacing of 0.3 mm and reflexion coefficient 0.91 at Ha. An interference filter of 30 Å half-width was used as premonochromator. A contact image intensifier was used for registering the fringes. The whole system was installed on a small equatorial mounted in a tube in which temperature was controlled. The observations were made at the high-altitude station of the Sternberg Astronomical Institute (ϕ = 44°, h = 3,000 m) near Alma-Ata. One-hour exposure was sufficient to record H and OH fringes at any point of the sky, including the zenith.

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