J.C.Bhattacharyya (1982 - 1990): Recent submissions

  • Minor planets and planetary rings 
    Bhattacharyya, J. C (Centre of Advanced Study in Astronomy Osmania University, 1984)
    Circumstances of the discovery of the first asteroid and the characteristics of various orbits followed by them have been discussed. Their shapes, compositions and evolutionary histories so far known have also been described. ...
  • Astronomy in India in the 20th century. 
    Bhattacharyya, J. C; Vagiswari, A (Indian National Science Academy, 1985)
  • Photometry of intermediate polars AO PSC and V 1223 SGR 
    Padmini, V. N; Marar, T. M. K; Seetha, S; Padmanabhan, P; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C; Kuppuswamy, K; Rozario, M. J (Springer, 1985-12)
    We present optical photometric observations of the cataclysmic variables AO Psc and V 1223 Sgr, both of which are believed to contain slowly-rotating white-dwarf pulsars. These objectes belong to the new class of intermediate ...
  • Some further measurements of Uranian ring condensations 
    Vasundhara, R; Bhattacharyya, J. C; Rajamohan, R; Mahra, H. S (Kluwer Academic Publishers, 1983)
    The results of photometric observations of the occultation of BD-19 degree 4222 by Uranus on April 26, 1981 from two stations in India conform with the model proposed by Elliot et al. (1981).
  • High speed photometry of PG 1012-029 
    Ashoka, B. N; Seetha, S; Marar, T. M. K; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (European Southern Observatory, 1994-03)
    High speed optical photometric observations of PG 1012 - 029, conducted during 1990-1991, confirm the nova-like classification of the object. Several eclipses observed by us have been used to refine the orbital period of ...
  • A personal-computer-based imaging Stokes polarimeter for solar observations 
    Ananth, A. V; Venkatakrishnan, P; Narayanan, R. S; Bhattacharyya, J. C (Springer, 1994-05)
    For measurements of vector magnetic field over solar active regions, a Stokes polarimeter for studying the polarization profiles on selected spectral lines is described. This paper gives details of the relevant charged ...
  • Detection of optical pulsations from RX J0558.0+5353 
    Ashoka, B. N; Marar, T. M. K; Seetha, S; Kasturirangan, K; Bhattacharyya, J. C (The European Southern Observatory, 1995-05)
    We report the detection of optical pulsations at a period of 272.785+-0.003s from the newly discovered intermediate polar RX J0558.0+5353. This period nearly coincides with the X-ray period reported by Haberl et al. (1994). ...
  • Solar eclipses - A powerful tool for the study of nature 
    Bhattacharyya, J. C (National Institute of Science Communication and Information Resources, 1990-12)
    Solar eclipses occur due to periodic coincidences in positions of the moon and the earth with respect to the sun. Characteristics of their orbital paths determine the periodicity, duration and shape, lengths and orientations ...
  • Some further characteristics of observing conditions at Leh 
    Singh, J; Bhattacharyya, J. C; Babu, G. S. D; Appakutty, M; Kuppuswamy, K; Moorthy, V; Devendran, P; Velu, C; Sivakumar, R (Astronomical Society of India, 1990-03)
    The sky conditions were monitored and duration of photometric and spectroscopic hours determined on 198 nights during the period September 1984 to October 1986. Observations were continued from May till November 1987 and ...
  • Proposed high altitude observing facility 
    Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1987-09)
  • 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 ...
  • 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 ...
  • Obituaries: M.K. Vainu Bappu 
    Bhattacharyya, J. C (Royal Astronomical Society, 1983-03)
  • Manali Kallat Vainu Bappu (1927 - 1982) Elected Fellow 1968 
    Bhattacharyya, J. C (Indian National Science Academy, 1985-04-26)
  • My encounter with astronomy : later years 
    Bhattacharyya, J. C (Astronomical Society of India, 1997)
  • My encounter with astronomy : early years 
    Bhattacharyya, J. C (Astronomical Society of India, 1997)
  • Anil Kumar Das (1902 - 1961) Elected Fellow 1943 
    Bhattacharyya, J. C (Indian National Science Academy, 1994-12-01)
  • Facility: Vainu Bappu Telescope 
    Bhattacharyya, J. C; Rajan, K. T (Astronomical Society of India, 1992)
  • Some further characteristics of observing conditions at Leh 
    Singh, J; Bhattacharyya, J. C; Babu, G. S. D; Appakutty, M; Kuppuswamy, K; Moorthy, V; Devendran, P; Velu, C; Sivakumar, R (Astronomical Society of India, 1990-03)
    The sky conditions were monitored and duration of photometric and spectroscopic hours determined on 198 nights during the period September 1984 to October 1986. Observations were continued from May till November 1987 and ...
  • Atmospheric extinction measurements at Leh in near infrared bands 
    Bhattacharyya, J. C; Scaria, K. K; Singh, J; Babu, G. S. D; Muraleedharan Nair, R; Sivaraman, K. R (Astronomical Society of Indian, 1990-03)
    Site survey observations to determine the extinction in the IR bands were carried out at Leh. Mean extinction coefficients obtained from 'two nights' observations in J, H, and K bands are k(J) = 0.05 + or - 0.01; k(H) = ...

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