Ca II Emission Lines in the Twilight Spectrum

Details Ca II Emission Lines in the Twilight Spectrum Ca II Emission Lines in the Twilight Spectrum

Aug 1956

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1956natur.178..276j&link_type=abstract

Nature, Volume 178, Issue 4527, pp. 276-277 (1956).

Physics

2

Scientific paper

SPECTRA obtained at Saskatoon during the summer of 1955 showed sharp emission lines of wave-lengths 3933.8 A. and 3968.4 A. +/- 0.2 A. to be present at times in the twilight. The spectra were obtained with two Schmidt spectrographs of dispersion 20 A./mm. and 10 A./mm. A microphotometer tracing of a twilight plate obtained on July 14 is shown in Fig. 1.

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