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Browsing IIAP Publications by Issue Date

Browsing IIAP Publications by Issue Date

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  • Theory of holographic plane gratings 
    Singh, M (National Institute of Science Communication And Information Resources, 1977-05)
    Theory of holographically recorded plane diffraction gratings (HRPDG) has been presented. In general HRPDG with have curved grooves with variable spacing. The self focussing property of HRPDG has been studied in detail. ...
  • 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 ...
  • 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 ...
  • Ionospheric total electron content and slab-thickness at low latitudes in Indian zone 
    Rastogi, R. G; Iyer, K. N; Sharma, R. P (Indian Academy of Sciences, 1977-06)
    Observations of Faraday rotation of beacon signals from low orbiting satellite BE-B recorded at one station near the dip equator (Kodaikanal, dip 3·4° N) and at another station near the peak of the equatorial anomaly ...
  • Day-to-day variability of midlatitude F region in winter 
    Sastri, J. H (National Institute of Science Communication and Information Resources, CSIR, 1977-06)
    A study is made of the day-to-day variability of midlatitude F region during winter daytime conditions, using total electron content (TEC) measurements at Auckland and Invercargill and peak density measurements at Auckland ...
  • Prominences in 1975 
    Bappu, M. K. V (Royal Astronomical Society, 1977-06)
  • Daytime ionosphere scintillation associated with geomagnetic storms 
    Deshpande, M. R; Vats, H. O; Sethia, G; Murthy, B. S (Nature Publishing Group, 1977-08)
  • Strong gravity, black holes, and hadrons 
    Sivaram, C; Sinha, K. P (American Physical Society, 1977-09)
    Certain similarities and analogies between the properties of black holes and elementary particles are considered in the framework of the strong gravitational field. Properties examined include measurable parameters (mass, ...
  • Nature of crochet associated solar microwave bursts 
    Sastri, J. H (National Institute of Science Communication and Information Resources, CSIR, 1977-09)
    Using crochet data at Kodaikanal and solar-microwave-burst data at Toyokawa, Japan, a study is made of the nature of crochet-associated solar microwave bursts. Consideration of the results in the light of earlier work ...
  • Indian Institute of Astrophysics. Report for the year 1975 April 1 to 1976 March 31 
    Bappu, M. K. V (Royal Astronomical Society, 1977-09)
  • On AlF lines in sunspots 
    Murty, P. S (D. Reidel Publishing Company, 1977-10)
    Intensity factors for bands of the C-A transition of the AlF molecule are calculated. A reinvestigation for the lines of (0, 0) band of the C-A system in sunspot spectra is suggested, so as to resolve the questionable ...
  • Transmission of acoustic wave energy across a magnetic flux sheath 
    Venkatakrishnan, P; Gokhale, M. H (Springer, 1977-10)
    The transmission of the energy of an acoustic wave incident on a magnetic flux sheath embedded in a homogeneous nonmagnetic plasma is analyzed for the case where finite current sheets are situated between the flux sheath ...
  • Stigmatic mounting of holographic plane grating 
    Singh, M (Tipografia Baccini and Chiappi, 1977-10)
    A Stigmatic mounting of holographic plane has been proposed and its properties have been studied theoretically. In this mounting the observation is to be made about a normal direction and different regions of the spectrum ...
  • Optical colours and polarization of a model reflection nebula. III - Composite and mixture of grains in the nebula with the star in the rear 
    Shah, G. A (Indian Academy of Sciences, 1977-11)
    The colour differences between the star and the associated reflection nebula and polarization caused by core mantle grains and mixture of grains have been given. They are based on homogeneous plane-parallel slab-model of ...
  • On the Re-function of the A-X system of NO+ 
    Murty, P. S (Elsevier, 1977-11)
    The band intensity factors, and r-centroids are reported, for bands of the A-X system of NO+, a stable molecular ion of astrophysical and aeronomical interest. The need for further laboratory band intensity measurements, ...
  • A classification scheme for pulsars 
    Kochhar, R. K (Nature Publishing Group, 1977-11)
    The implications of a pulsar classification scheme are discussed. Three types of pulsars are distinguished - Type S (S for single) from supernova explosions of single stars; type D (D for disrupted) from binaries disrupted ...
  • Geometry effects on the formation of the hydrogen Ly-alpha line in planetary nebulae 
    Peraiah, A; Wehrse, R (European Southern Observatory, 1977-12)
    In order to study the effects of sphericity on the radiative transfer in the hydrogen Ly alpha line of planetary nebulae, the radiation field in this line is calculated for static pure hydrogen models with ratios of outer ...
  • Experimental verification of the new mounting of concave grating 
    Singh, M (National Institute of Science Communication and Information Resource, 1977-12)
  • 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 ...
  • An analysis of Babinet compensator fringes using Jones calculus 
    Pandya, T. P; Saxena, A. K (Indian Institute of Astrophysics, 1978)
    Following Jones Calculus, a comprehensive theory of the Babinet Compensator has been presented. The performance of the system governed by the compensator-Polaroid unit, has been evaluated in terms of fringe visibility. ...

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