A velocity curve of the Wolf-Rayet eclipsing system HD 214419 is obtained from measures on prismatic spectra of the Hell 5411 emission line. The shape of the velocity curve is unlike that obtained for Hell 4686. The emission ...

Many of the oscillations observed at the solar surface have been identified with resonant normal modes of the entire solar body. Accurate measurements of frequencies of these modes enable us to study the internal structure ...

We report the first observations of absorption and enhancement in flux of high energy photons during thte total solar eclipse of October 24, 1995. For the purpose of these observations, we employed a scintillation counter ...

High resolution observations in the radio range from the ground and X-rays from satellites during the past few years have provided new insights into the nature of emission processes and energies of solar eruptions. It is ...

In the present communication we have studied the contribution of cellular adaptation in increasing the photoreceptor increment threshold as a function of background intensity in intact eye and isolated retina. In intact ...

The occurrence of Total Solar Eclipse on October 24, 1995 provided an unique opportunity to conduct some experiments using IR sun photometers in the spectral range 0.75 micrometer to 1.6 micrometer and 205 to 14.5 micrometer ...

For successful observations in any telescope, guiding becomes important. On 2.34 m Telescope at Vainu Bappu Observatory, Kavalur, a remote guiding system is assembled using Intensified CCD camera and a PC based image ...

Intensity fluctuations of shadow bands during total solar eclipse of October 24, 1995 were recorded on magnetic tape using cross - shaped array of sixteen photo detectors at Nim Ka Thana. The plane of the array was placed ...

We present details of procedure on equidensitometry of globular clusters using the Sabattier technique in photography. Equidensitometry of Omega Centauri and 47 Tuc shows that both clusters become more elliptical beyond r ...