Browsing by Subject "Spectrograms"

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H-alpha flare of 14 March, 1984 -- Evidence for reconnection?

Sundararaman, K; Aleem, S. M; Singh, J; Selvendran, R; Thiagarajan, R (Springer, 1994-01)

Kodaikanal H-alpha monochromatic and white-light observations are used to study the circular flare of 14 March, 1984. We report here the dynamic activity of the H-alpha filament, which attained a severe twist before erupting ...
Observation of an H-alpha outburst in the Be star HR 4123

Ghosh, K. K; Apparao, K. M. V; Tarafdar, S. P (American Astronomical Society, 1989-09)

During routine monitoring of the Be star HR 4123 during the year 1987-1988, a burst of H-alpha emission was observed on May 11, 1987. The increase was observed on May 9 and lasted until June 7, peaking to an equivalent ...
Solar Limb Gradient from Eclipse Spectra of February 15, 1961

Kubicela, Aleksandar (Kodaikanal Observatory, 1969-05)

On the occasion of the total solar eclipse of February 15, 1961 two spectrograms contain a smooth transition of the photospheric spectrum into the chromospheric one and vice versa. Continual registration has been achieved ...
A study of the H-alpha line in late G and K supergiants

Mallik, S. G. V (Indian Academy of Sciences, 1982-03)

H-alpha is investigated spectroscopically in order to gain information on the properties of expanding chromospheres of late G and K supergiants. Spectra of 23 stars brighter than V equals 6.0 are obtained at dispersions ...

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