IIAP Publications: Recent submissions

  • Nighttime Pi2 micropulsations at Kodaikanal 
    Sastri, J. H; Murthy, B. S (National Institute of Science Communication And Information Resources, 1975-09)
  • Geomagnetic solar flare effect in the dark hemisphere 
    Sastri, J. H (National Institute of Science Communication And Information Resources, 1975-09)
    Normal run magnetogram data obtained at Huancayo, Kodaikanal and Kakioka show that the geomagnetic solar flare effect (SFE or Crochet) occurs not only in the sunlit hemisphere but also in the dark hemisphere. Using a ...
  • A phenomenological, kinematical model of the coronal magnetic fields in terms of thin flux tubes rising from the photosphere 
    Gokhale, M. H; Venkatakrishnan, P (Indian Academy of Sciences, 1978-11)
    A kinematical model is necessary for understanding the gross structure of the coronal magnetic field and its slow evolution in consistency with the small scale structure of the photospheric fields. Here we have developed ...
  • Characteristics of night sporadic-E at Kodaikanal 
    Sastri, J. H; Murthy, B. S (National Institute of Science Communication And Information Resources, 1975-09)
    Published ionospheric data were used as a basis to study the characteristics of nighttime Es (blanketing frequency, virtual height, and transparency range) at Kodaikanal (geomag. lat.: 0.6 N; dip: 3.5 N) with the object ...
  • Occurrence of M and N echoes at the equatorial station, Kodaikanal 
    Sastri, J. H; Murthy, B. S (National Institute of Science Communication And Information Resources, 1975-03)
    Results are presented from a study on the occurrence of M and N traces on ionograms at the equatorial station Kodaikanal, with particular reference to their associations with various sporadic configurations. It is shown ...
  • Daily variation of the equatorial geomagnetic field in the vicinity of the IMF sector boundaries 
    Murthy, B. S (National Institute of Science Communication And Information Resources, 1979-12)
    The response of the equatorial geomagnetic field to the passage of over 170 spacecraft-observed and well-established sector boundaries during the period 1962-1972 has been studied. It is shown from superposed epoch analysis ...
  • The Wilson-Bappu effect for Mg II k-line emission widths 
    Parthasarathy, M (D.Reidel Publishing, 1985)
    The existence of a tight linear correlation between the stellar absolute magnitude Mv and the Mg II k-line emission width log WMg II k (km s/sup-1) is confirmed using IUE high-resolution (0.2 Å) data for 100 late-type stars.
  • Effect of electrojet on the total electron content of the ionosphere over the Indian subcontinent 
    Deshpande, M. R; Rastogi, R. G; Vats, H. O; Sethia, G; Klobuchar, J. A; Jain, A. R; Subbarao, B. S; Patwari, V. M; Janve, A. V; Rai, R. K; Singh, M; Gurm, H. S; Murthy, B. S (Nature Publishing Group, 1977-06)
    The radio beacon method of measuring TEC along a chain of optimally spaced stations near the equatorial anomaly has been used to monitor continuously the latitudinal extent of the anomaly. Comparisons with the magnitude ...
  • Preliminary results on the flux of TeV g-rays from crab system obtained with the PACT at Pachmarhi 
    Sripathi Acharya, B; Bhat, P. N; Chitnis, V. R; Majumdar, P; Rahman, M. A; Singh, B. B; Vishwanath, P. R (International Union of Pure and Applied Physics, 2003-07)
    We have observed the Crab system (Nebula and Pulsar) and the corresponding background regions during many clear nights in the years 1999-2002 ˇ using the atmospheric Cerenkov array at Pachmarhi, PACT. Preliminary results ...
  • PACT results on very high energy g-ray emission from CRAB pulsar 
    Sripathi Acharya, B; Vishwanath, P. R; Bhat, P. N; Chitnis, V. R; Majumdar, P; Rahman, M. A; Singh, B. B (International Union of Pure and Applied Physics, 2003-07)
    The data taken on the Crab pulsar by the recently commissioned array of ˇ Cerenkov telescopes at Pachmarhi using the wave front sampling technique have been analyzed. The phasograms show significant excess of events at the ...
  • Eruptive prominence of february 26, 1953, and associated radio noise-burst 
    Das, A. K; Sethumadhavan, K (Nature Publishing Group, 1953-09)
  • High altitude gamma ray observatory at Hanle 
    Sripathi Acharya, B; Cowsik, R; Bhat, P. N; Chitnis, V. R; Vishwanath, P. R; Prabhu, T. P; Srinivasan, R (International Union of Pure and Applied Physics, 2003-07)
    We have carried out Monte Carlo simulations to study the nature of Cherenkov light pool generated by γ -ray and proton primaries for the altitude of Hanle(4515m amsl) in the Himalayas, the site of proposed HAGAR experiment. ...
  • Kolmogorov dissipation scales in weakly ionized plasmas 
    Krishan, V; Yoshida, Z (Royal Astronomical Society, 2009-06)
    In a weakly ionized plasma, the evolution of the magnetic field is described by a `generalized Ohm's law' that includes the Hall effect and the ambipolar diffusion terms. These terms introduce additional spatial and ...
  • Optical glass: its manufacture in India — a historical perspective 
    Saxena, A. K; Vagiswari, A; Manjula, M (Indian National Science Academy, 1991)
    A historical perspective of optical glass industry in India has been presented in this paper. In this introduction a clear definition and understanding of optical glass is given. This is followed by world perspective. The ...
  • Difference of temperature between pole and equator of the sun 
    Das, A. K; Abhyankar, K. D (Nature Publishing Group, 1953-09)
    BothEmden's/sup1 old hydrodynamic solar theory and the more modern thermo-hydrodynamical solar theory due to Bjerknes/sup2 lead to a higher temperature at the poles than at the equator of the sun. Bjerknes's theory is, ...
  • Very high energy gamma rays from geminga pulsar 
    Vishwanath, P. R; Sripathi Acharya, B; Bhat, P. N; Chitnis, V. R (International Union of Pure and Applied Physics, 2005)
  • Geomagnetic activity and the sunspot cycle 
    Ananthakrishnan, R (Nature Publishing Group, 1953-11)
    It is well known that the daily international magnetic character figure Ci constitutes a valuable index for classifying days according to their magnetic activity averaged over a large part of the earth. As a measure of the ...
  • Council report on solar activity in 1949 
    Das, A. K (Royal Astronomical Society, 1950)
  • On the origin of highest energy cosmic rays 
    Sigl, G; Schramm, D. N; Bhattacharjee, P (Elsevier, 1994-09)
    In this paper we show that the conventional diffusive shock acceleration mechanism for cosmic rays associated with relativistic astrophysical shocks in active galactic nuclei (AGNs) has severe difficulties to explain the ...
  • Solar activity (Report on progress of astronomy) 
    Das, A. K (Royal Astronomical Society, 1951)

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