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  • 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 ...
  • Stimulated raman scattering in active galactic nuclei 
    Krishan, V; Wiita, P. J (International Astronomical Union, 1986)
    Stimulated Raman Scattering (SRS) processes offer an attractive and efficient method for producing both essentially the entire non-thermal continuum as well as fast electrons in active galactic nuclei (AGN). In this picture, ...
  • Stimulated Raman scattering of water maser lines in astrophysical plasmas 
    Gangadhara, R. T; Deguchi, S; Lesch, H (American Institute of Physics, 1999-10)
    Radiative transfer equations are derived and solved for the stimulated Raman scattering of water maser lines in the astrophysical plasmas with electrons density of about 106 - 107cm-3. In stimulated Raman scattering, the ...
  • Stirred and shaken! 
    Sivaram, C (Deccan Herald, 2011-03-29)
    CHEMISTRY NOBELS In the International Year of Chemistry, C Sivaram charts the Nobel prize winning achievements in the field, from work on synthesis of sugars to vitamin chemistry.
  • Stochastic modeling of multiwavelength variability of the classical BL Lac Object OJ 287 on timescales ranging from decades to hours 
    Goyal, A; Stawarz, L; Zola, S; Marchenko, V; Soida, M; Nilsson, K; Ciprini, S; Baran, A; Ostrowski, M; Wiita, P. J; Gopal-Krishna; iemiginowska, A; Sobolewska, M; Jorstad, S; Marscher, A; Aller, M. F; Aller, H. D; Hovatta, T; Caton, D. B; Reichart, D; Matsumoto, K; Sadakane, K; Gazeas, K; Kidger, M; Piirola, V; Jermak, H; Alicavus, F; Baliyan, K. S; Baransky, A; Berdyugin, A; Blay, P; Boumis, P; Boyd, D; Bufan, Y; Campas Torrent, M; Campos, F; Carrillo Gomez, J; Dalessio, J; Debski, B; Dimitrov, D; Drozdz, M; Er, H; Erdem, A; Escartin Perez, A; Fallah Ramazani, V; Filippenko, A. V; Gafton, E; Garcia, F; Godunova, V; Gomez Pinilla, F; Maheswar, G; Haislip, J. B; Haque, S; Harmanen, J; Hudec, R; Hurst, G; Ivarsen, K. M; Joshi, A; Kagitani, M; Karaman, N; Karjalainen, R; Kaur, N; Koziel-Wierzbowska, D; Kuligowska, E; Kundera, T; Kurowski, S; Kvammen, A; LaCluyze, A. P; Lee, B. C; Liakos, A; Lozano de Haro, J; Moore, J. P; Mugrauer, M; Naves Nogues, R; Neely, A. W; Ogloza, W; Okano, S; Pajdosz, U; Pandey, J. C; Perri, M; Poyner, G; Provencal, J; Pursimo, T; Raj, A; and 29 co-authors (IOP Publishing, 2018-08-20)
    We present the results of our power spectral density analysis for the BL Lac object OJ 287, utilizing the Fermi-LAT survey at high-energy γ-rays, Swift-XRT in X-rays, several ground-based telescopes and the Kepler satellite ...
  • Stochastic polarized line formation. I. Zeeman propagation matrix in a random magnetic field 
    Frisch, H; Sampoorna, M; Nagendra, K. N (The European Southern Observatory, 2005-10)
    This paper considers the effect of a random magnetic field on Zeeman line transfer, assuming that the scales of fluctuations of the random field are much smaller than photon mean free paths associated to the line formation ...
  • Stochastic polarized line formation. II. Zeeman line transfer in a random magnetic field 
    Frisch, H; Sampoorna, M; Nagendra, K. N (EDP Sciences, 2006-03)
    Context.The Zeeman effect produced by a turbulent magnetic field or a random distribution of flux tubes is usually treated in the microturbulent or macroturbulent limits where the Zeeman propagation matrix or the Stokes ...
  • Stochastic polarized line formation: I Zeeman propagation matrix in a random magnetic field 
    Frisch, H; Sampoorna, M; Nagendra, K. N (EDP Sciences, 2006-07)
    This paper considers the effect of a random magnetic field on Zeeman line transfer, assuming that the scales of fluctuations of the random field are much smaller than photon mean free paths associated to the line formation ...
  • Stokes Diagnostics of Magneto-Acoustic Wave Propagation in the Magnetic Network on the Sun 
    Vigeesh, G; Steiner, O; Hasan, S. S (Springer, 2011-10)
    The solar atmosphere is magnetically structured and highly dynamic. Owing to the dynamic nature of the regions in which the magnetic structures exist, waves can be excited in them. Numerical investigations of wave propagation ...
  • Stokes Polarimetry and the Measurement of Vector Magnetic Fields in Solar Active Regions 
    Balasubramaniam, K. S (Indian Institute of Astrophysics, Bangalore, 1988-07)
  • Stone Inscriptions on Eclipses in Karnataka 
    Shylaja, B. S; Murthy, Chidananda. M (Indian Institute of Astrophysics, Bangalore, 1997)
    The solar and lunar eclipses have been documented on stone inscriptions in various parts of Karnataka, from the 9th century onwards. The records testify the knowledge of positional astronomy and also the cultural and ...
  • Storing light in active optical waveguides with single-negative materials 
    Lu, W. T; Huang, Y. J; Casse, B. D. F; Banyal, R. K; Sridharb, S (American Institute of Physics, 2010-05-24)
    We show that a nonresonant planar waveguide consisting of conventional dielectric cladded with single-negative materials supports degenerate propagating modes for which the group velocity and total energy flow can be zero ...
  • Straight arcs in gravitational lens systems 
    Narasimha, D; Chitre, S. M (Astronomical Society of India, 1993)
    Faint straight arcs extending over ten to twenty arcseconds have been observed behind rich clusters of galaxies elongated by the lensing action of the foreground cluster. When a cluster of galaxies has its projected surface ...
  • Straightforward inversion of MT data using a normalized impedance function 
    Sri Niwas; Gupta, P. K; Gaur, V. K (Society of Exploration Geophysicists, 2007)
    We present a new algorithm for 1D magnetotelluric (MT) data inversion. It inverts a normalized impedance response function derived from the classical Cagniard impedance function. The scheme transforms the nonlinear problem ...
  • The strange case of SN 2011ja and its host 
    Chakraborti, S; Ray, A; Smith, R; Ryder, S; Yadav, N; Sutaria, F. K; Dwarkadas, V. V; Chandra, P; Pooley, D; Roy, R (Cambridge University Press, 2014-01)
    SN 2001ja was observed twice in three months using the Chandra X-Ray Observatory. The X-ray flux could be due to interaction with the circumstellar medium, perhaps dominated by the reverse shock heated thermal plasma, or ...
  • Strength of the Solar Coronal Magnetic Field A Comparison of Independent Estimates Using Contemporaneous Radio and White-Light Observations 
    Anshu Kumari; Ramesh, R; Kathiravan, C; Wang, T. J (Springer, 2017-11)
    Abstract We estimated the coronal magnetic field strength (B) during the 23 July 2016 coronal mass ejection (CME) event using i) the flux rope structure of the CME in the whitelight coronagraph images and ii) the ...
  • Strengths and weaknesses of the big bang cosmology 
    Narlikar, J. V (Astronomical Society of India, 1992)
    The achievements and shortcomings of the standard hot big bang models of the universe are reviewed. The achievements lie in the predictions of the expanding universe, the abundances of light nuclei, and the MW background. ...
  • String tension and fundamental constants in the early universe 
    Sivaram, C (Springer, 1990-05)
    An energy-dependent string tension could be connected to the fundamental physical and coupling constants. The role of Weyl gravity for sub-Planckian as well as macroscopic domains is explored and the existence of a hierarchy ...
  • Strong (f) gravity, Dirac's large numbers hypothesis and the early hadron era of the big-bang universe 
    Sivaram, C; Sinha, K. P (Indian Institution Science, 1975-05)

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