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Now showing items 21-40 of 210

Remembering Bappu

Library, IIA (Library, Indian Institute of Astrophysics, 2010-08-10)

A glimpse of the exhibits displayed at the Library, IIA, Bangalore on Founder’s day. 10 August, 2010
The Spectrum of the Light of the Night Sky during the Recent Sunspot Maximum.

Bappu, M. K. V (American Astronomical Society, 1950-01)
Spectral characteristics of a solar flare from ionospheric data

Bhattacharyya, J. C; Balakrishnan, T. K (Pergamon Press Ltd, 1967)

From the height variation of electron densities during a solar flare, ultra violet and X-ray contribution of ionization process has been estimated. The results thus obtained are in conformity with direct measurements of ...
Image processing facilities at Vainu Bappu observatory

Giridhar, S; Bhattacharyya, J. C; Kutty, K. N (Tata Institute of Fundamental Research, 1988)

Need for application of Image processing techniques in astronomical studies in optical wavelengths and special advantages accruing thereby are discussed. The paper describes various image processing facilities that are ...
Solar physics in India

Krishan, V; Bhattacharyya, J. C (National Solar Observatory, 1988-07)
Occultation: A precise method in astronomical studies

Bhattacharyya, J. C (Indian Academy of Sciences, 1982-05-09)
Lunar occultation techniques in investigations of binary stars

Bhattacharyya, J. C (Tira Pustaka, Jakarta, 1984)

The paper discusses the possibility of direct measurement of angular separations and luminosity ratios of components of unresolved binary systems through observations of lunar occultations. A current program at Kavalur ...
The eclipses of the Sun

Bappu, M. K. V (1979-03)
The road to Kavalur

Bhattacharyya, J. C (Nehru Centre, 1985-08)
King Comet

Datta, B; Bhattacharyya, J. C (Nehru Centre, 1985-09)
Identification of emission bands in P/Halley

Bhattacharyya, J. C; Babu, G. S. D; Ghosh, K. K; Jayakumar, K; Appakutty, M (Indian Academy of Sciences, 1986)

Spectrophotometric studies of P /Halley (r = 1.98 AU, Δ= 1.19AU, r = 1.97, Δ = 1.16 AU and r = 1.95 AU, Δ. = 1.13 AU) in the spectral range 3900 A - 6450 A were made on three nights and identifications of emission features ...
Outer rings of Saturn

Bhattacharyya, J. C; Vasundhara, R (Indian Academy of Sciences, 1985)

A two component model of a possible ring structure at about 12.5 Saturn radii is presented here which can explain the shapes of the immersion and emersion occultation profiles obtained during the occultation of SAO 158913 ...
Ionospheric electron content and equivalent slab thickness in the equatorial region

Das Gupta, A; Basu, S; Bhar, J. N; Bhattacharyya, J. C (American Geophysical Union, 1975-02)

The ionospheric total electron content and equivalent slab thickness in the equatorial region around 75° E have been studied. It is found that the slab thickness exhibits a strong latitudinal dependence with a maximum at ...
HiRES: high resolution extreme ultraviolet spectroheliometer

Berger, T; Bergamini, P; Kirby, H; Timothy, J. G; Walker, A. B. C; Bhattacharyya, J. C; Jain, S. K; Saxena, A. K; Huber, M. C. E; Naletto, G; Tondello, G (Cambridge University Press, 1993)

The HiRES sounding rocket payload is designed to obtain very high spatial, spectral, and temporal resolution images of the solar chromospheric and coronal plasmas in the extreme ultraviolet (EUV) wavelength range from 500 ...
Determination of the limb darkening of the solar disc in the visible and near ultraviolet

Bhattacharyya, J. C; Chandramohan, R; Sundareswaran, A; Charles, A (Indian National Science Academy, 1981)
Further photometric observations of the cataclysmic variable PG 1012-029

Ashoka, B. N; Marar, T. M. K; Seetha, S; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (Kluwer Academic Publishers, 1993)

We report time series photometric observations of PG 1012-029, conducted during 1990 and 1991. Light curves of three consecutive eclipses recorded in a single night are presented. The enhanced pre-eclipse hump in our data ...
Stellar Chromospheres

Bappu, M. K. V (1977)
An atmosphere on Ganymede from its occultation of SAO 186800 on 7 June 1972

Carlson, R. W; Bhattacharyya, J. C; Smith, B. A; Johnson, T. V; Hidayat, B; Smith, S. A; Taylor, G. E; O'Leary, B; Brinkmann, R. T (The American Association for the Advancement of Science, 1973-09)

On 7 June 1972 the third Jovian satellite Ganymede occulted the eighth-magnitude star SAO 186800. Successful photoelectric observations obtained at Lembang, Java (Indonesia), and Kavalur, India, show nonabrupt immersions ...
Total electron concentration of the ionosphere over the magnetic equator

Rastogi, R. G; Iyer, K. N; Bhattacharyya, J. C (Indian Academy of Sciences, 1975-08)
Optical astronomy in India - prospects of the next decade

Bappu, M. K. V (Indian Academy of Sciences, 1972-12)

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