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Browsing by Author "Bhattacharyya, J. C"

Browsing by Author "Bhattacharyya, J. C"

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  • Indian Institute of Astrophysics Annual Report: 1987-88 
    Bhattacharyya, J. C (Indian Institute of Astrophysics, 1988)
  • Indian Institute of Astrophysics Annual Report: 1988-89 
    Bhattacharyya, J. C (Indian Institute of Astrophysics, 1989)
  • Indian Institute of Astrophysics Annual Report: 1989-90 
    Bhattacharyya, J. C (Indian Institute of Astrophysics, 1990)
  • Indications of twist in the Epsilon rings of Uranus 
    Vasundhara, R; Bhattacharyya, J. C (Centre national D Etudes Spatiales, 1982)
    The possibility of the Uranus epsilon ring having a structure consisting of a twisted bundle of narrow lanes of condensed material similar to that of Saturn's F ring was examined by cross correlation of a pair of light ...
  • The Intermediate Polar PQ GEM -- Status of Wet Observations of 1996 
    Marar, T. M. K; Seetha, S; Ashoka, B. N; Kasturirangan, K; Mahra, H. S; Bhattacharyya, J. C; Leibowitz, E. M; Hemar, S; Mendelson, H; Ibbetson, P. A; O'Donoghue, D; Buckley, D. A. H; Breger, M; Handler, G; Sperl, M; Serkowitsch, E; Moskalik, P; Zola, S; Pajdosz, G; Krzesinski, J; Silvotti, R; Vauclair, G; Dolez, N; Solheim, J. E; Pfeiffer, B; Kepler, S. O; Kanaan, A; Provencal, J; Kawaler, S. D; O'Brien, M. S; Nather, R. E; Winget, D. E; Kleinman, S; Nitta, A; Bradley, P. A; Guzik, J. A; Clemens, C; Sullivan, D. J; Jiang, X (Baltic Astronomy, 1998-03)
    A summary of the results on PQ Gem based on WET observations conducted in February 1996 is presented. The 13.9 min spin period of the white dwarf in the system and the orbital side-band at 14.5 min have been detected ...
  • 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 ...
  • 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 ...
  • King Comet 
    Datta, B; Bhattacharyya, J. C (Nehru Centre, 1985-09)
  • 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 ...
  • Manali Kallat Vainu Bappu (1927 - 1982) Elected Fellow 1968 
    Bhattacharyya, J. C (Indian National Science Academy, 1985-04-26)
  • Measurement of Solar Magnetic Fields 
    Bhattacharyya, J. C; Balasubramaniam, K. S (Indian Institute of Astrophysics, Bangalore, 1986)
    The paper reviews several methods of estimation of solar magnetic fields so far employed. The possibility of measurement of the vector magnetic fields by using two dimensional detector arrays is discussed. A program for ...
  • Measurement of vector magnetic fields. I - Theoretical approach to the instrumental polarisation of the Kodaikanal Solar Tower 
    Balasubramaniam, K. S; Venkatakrishnan, P; Bhattacharyya, J. C (D. Reidel Publishing Co., 1985-09)
    The observations of Stokes line profiles require an accurate knowledge of the instrumental polarisation caused by optical components in the path of the light beam. In this context we present a theoretical approach to the ...
  • The Microprocessor control of the Kavalur 234-cm optical telescope 
    Chinnappan, V; Bhattacharyya, J. C (Astronomical Society of India, 1985-06)
    This paper gives an introduction to the control system of the 234-cm optical telescope. The computer used in control is based on an INTEL 16 bit microprocessor. The VAX 11/780 system has a supervisory role in the control ...
  • 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. ...
  • My encounter with astronomy : early years 
    Bhattacharyya, J. C (Astronomical Society of India, 1997)
  • My encounter with astronomy : later years 
    Bhattacharyya, J. C (Astronomical Society of India, 1997)
  • New Instrumentation efforts in Solar studies 
    Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1988)
  • 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 ...
  • New telescopes in India 
    Bhattacharyya, J. C (D. Reidel Publishing Co., 1986-01)
    The review covers the description and present status of the two optical/infrared telescopes designed and presently near fabrication in India. The 234 cm aperture optical telescope expected to be installed at Kavalur shortly ...
  • Obituaries: M.K. Vainu Bappu 
    Bhattacharyya, J. C (Royal Astronomical Society, 1983-03)

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