Observations of Auroræ on August 12 and 13

Details Observations of Auroræ on August 12 and 13 Observations of Auroræ on August 12 and 13

Sep 1880

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1880natur..22..510c&link_type=abstract

Nature, Volume 22, Issue 570, pp. 510 (1880).

Physics

Scientific paper

THE finest display was between 10 and 11 o'clock on the evening of the 12th, when a magnificent corona was formed almost exactly on γ Cygni. At this time the bases of the columns on the eastern horizon were distinctly red. Unfortunately the spectroscope could not be brought to bear until the aurora had faded to a small fraction of its greatest brightness. With a very small dispersion (Vogel spectroscope) the spectrum was continuous from W.L. 557 mm. to W.L. 473, with strong traces of a finely banded spectrum, terminating abruptly at the great line 557. Towards the violet an isolated line was seen and measured.

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