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Browsing J.C.Bhattacharyya (1982 - 1990) by Issue Date

Browsing J.C.Bhattacharyya (1982 - 1990) by Issue Date

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  • Photoelectric light curve of YY Eridani 
    Bhattacharyya, J. C (Kodaikanal Observatory, 1966-12)
    Photoelectric light curves in B and V of the W Ursa majoris star YY Eridani have been determined. Gradual lengthening of the period has been observed
  • 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 ...
  • Studies of Solar Magnetic and Velocity Fields 
    Bhattacharyya, J. C (Indian Institute of Astrophysics, Kodaikanal Observatory, Kodaikanal, 1969)
  • Ionospheric Indication of Short-time Solar Activity Variations 
    Bhattacharyya, J. C; Sunder, R. S (PID [Publications and Information Directorate], 1970)
    A series of Lyot filtergrams have been photometrically analysed and the variations in the plage intensity determined on a number of days. From simultaneous ionosonde records, correlation has been sought between the electron ...
  • The Solar Magnetometer of Kodaikanal Observatory 
    Bhattacharyya, J. C (Kodaikanal Observatory, 1970-10)
    An instrument capable of measurement of weak longitudinal component of magnetic fields on the sun has been designed and constructed for operation with the horizontal solar telescope and high dispersion spectrograph of ...
  • Velocity Oscillations in the Solar Atmosphere 
    Bhattacharyya, J. C (Solar Physics, Vol. 24, No. 2, pp. 274 - 287, 1972-06)
    From a series of long duration continuous Doppler records of selected spectral lines, characteristics of solar velocity oscillations have been studied. Statistical distribution of the durations of the bursts of oscillations ...
  • On emission lines of hydrogen, helium and ionized calcium seen on a coronal spectrogram of the march 7, 1970 eclipse 
    Bappu, M. K. V; Bhattacharyya, J. C; Sivaraman, K. R (D. Reidel Publishing, 1972-10)
    Emission lines of the Balmer series, D3 and H and K are reported present on a coronal spectrogram obtained at the March 7, 1970 eclipse. Arguments are presented to show that these could not have originated from scattering ...
  • Photometry of the solar corona of March 7, 1970 
    Bappu, M. K. V; Bhattacharyya, J. C; Sivaraman, K. R (Indian Academy of Sciences, 1973)
    Isophotes obtained by equidensitometry techniques from four exposures of the March 7, 1970 corona are used for derivation of intensity distributions along the equator, poles, streamers and dark ' gaps ' in the visible ...
  • 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 ...
  • Fifteenth General Assembly of the I. A. U. 
    Bhattacharyya, J. C (Astronomical Society of India, 1973-09)
  • A ground based near infra-red detector system 
    Bhattacharya, J. C (Centre of Advanced Study in Astronomy,Osmania University, 1974)
    The problems connected with observations in the near infra-red from ground based locations are discussed. It is shown that optical telescopes located at high stations in India. can be used effectively for near infra-red ...
  • 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 ...
  • 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)
  • An Analog System for Fast Light Curve Registration 
    Bhattacharyya, J. C; Sundareswaran. A (Indian Institute of Astrophysics, Bangalore, 1977)
    An electronic system for recording fast light curves is described. The system employs a two track magnetic tape recorder for intermediate storage of photometer and time signals and reproduces these on cathode ray oscilloscope ...
  • Discovery of a New Satellite of Uranus 
    Bhattacharyya, J. C; Kuppuswamy, K (Astronomical Society of India, 1977-03)
  • A new satellite of Uranus 
    Bhattacharyya, J. C; Kuppuswamy, K (Nature Publishing Group, 1977-05)
    During the observation of the occultation of the star SAO 158687 by Uranus on March 10, 1977, there occurred an unexpected event which suggests the existence of a hitherto unknown satellite of the planet. On the basis of ...
  • Saturn-like ring system around Uranus 
    Bhattacharyya, J. C; Bappu, M. K. V (Nature Publishing Group, 1977-12)
    A photoelectric record of the occultation of SAO 158687 by Uranus on March 10, 1977, is analyzed. The observed variation in the intensity of the star's light is shown to indicate the presence of four zones, which are ...
  • Total Solar Eclipse of 1980 
    Bhattacharyya, J. C (Astronomical Society of India, 1978-03)
  • Extended ring system of Uranus 
    Bhattacharyya, J. C; Bappu, M. K. V; Mohin, S; Mahra, H. S; Gupta, S. K (D. Reidel Publishing, 1979-12)
    Two photoelectric records of the occultation event on 10 March, 1977, obtained by two 102-cm-aperture telescopes, spaced 1500 km apart, are critically analyzed and indications of a complex structure of distribution of ...
  • The rings of Uranus: story of its discovery 
    Bhattacharyya, J. C (Indian Astronomical Society, 1980)

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