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  • The Radio Source Projected Near the Absorption-Line QSO PHL 5200 
    Gopal-Krishna (Astronomical Society of India, 1978-12)
    Some recently discovered properties of the radio source 4C - 05.93 are summarised. Their relevance to the observed absorption-line spectrum of the QSO PHL 5200, which is located onl 1 arcmin away from the radio source, is ...
  • Radio spectrograph observations of the recent soalr eclipse on October 24, 1995 
    Shanmugaraju, A; Umapathy, S (Indian Institute of Astrophysics, Banglaore, 1997)
    A solar radio spectrograph has been developed to observe the transient solar radio emissions in the band of 30 MHz at our School of Physics. A non trackable log periodic antenna having beam of 60 degree in E-W and 90 degree ...
  • Radio spectrum measurements at the Gauribidanur observatory 
    Monstein, C; Ramesh, R; Kathiravan, C (Astronomical Society of India, 2007-12)
    During a campaign in December 2006, radio spectrum measure- ments over the frequency range 45-870 MHz were carried out at the Gauribida- nur observatory, located about 100 km north of Bangalore. The spectrometer used for ...
  • Radio Star Scintillations in Equatorial Region 
    Bhargava, B. N (IETE, 1964)
    The technique of obtaining information on ionospheric irrgularities by observing scintillation of signal from discrete sources of radio noise is described. Work on scintillation carried out at a few equatorial stations in ...
  • Radio Studies of young core collapse supernovae 
    Chandra, P; Ray, A; Bhatnagar, S (Astronomical Society of India, 2002-09)
    Multi-frequency observations of two radio bright SNe (SN1993J, SN1979C) carried out over a year with GMRT are presented. Their radio light curves trace the evolution of the mass loss in the stellar wind before the pre-supernova ...
  • Radio Study of a Superwind-galaxy: NGC1482 
    Hota, A; Saikia, D. J (Astronomical Society of India, 2003)
    We present GMRT and VLA observations of the superwind galaxy, NGC1482, which has been discovered to have a remarkable hour-glass shaped optical emission line outflow on both sides of the galactic disk. The central region ...
  • Radio study of the Galactic Centre Environment 
    Roy, S (Astronomical Society of India, 2002-09)
    The central region of our milky way Galaxy still eludes a comprehensive understanding. With new observations. however. we are being able to know many of the observable properties of the sources, which allow us to better ...
  • Radio wave heating of astrophysical plasmas 
    Gangadhara, R. T; Krishan, V (Indian Academy of Sciences, 1990-12)
    The coherent plasma process, parametric decay instability (PDI), has been applied to a homogeneous and unmagnetized plasma. These instabilities cause anomalous absorption of strong electromagnetic radiation under specific ...
  • Radio, millimeter and optical monitoring of GRB 030329 afterglow: constraining the double jet model 
    Resmi, L; Ishwara-Chandra, C. H; Castro-Tirado, A. J; Bhattacharya, D; Rao, A. P; Bremer, M; Pandey, S. B; Sahu, D. K; Bhatt, B. C; Sagar, R; Anupama, G. C; Subramaniam, A; Lundgren, A; Gorosabel, J; Guziy, S; de Ugarte Postigo, A; Castro Cerón, J. M; Wiklind, T (EDP Sciences, 2005-09)
    We present radio, millimeter and optical observations of the afterglow of GRB 030329. $UBVR_{\rm C}I_{\rm C}$ photometry is presented for a period of 3 h to 34 days after the burst. Radio monitoring at 1280 MHz has been ...
  • Radio, X-ray, and extreme-ultraviolet observations of weak energy releases in the "Quiet" sun 
    Ramesh, R; Kathiravan, C; Mithun, N. P. S; Vadawale, S. V (IOP Publishing, 2021-09-01)
    We analyzed ground-based low frequency (<100 MHz) radio spectral and imaging data of the solar corona obtained with the facilities in the Gauribidanur observatory during the same time as the very weak soft X-ray flares ...
  • Radio-loud Exoplanet-exomoon Survey: GMRT Search for Electron Cyclotron Maser Emission 
    Narang, Mayank; Oza, Apurva V; Hakim, Kaustubh; Manoj, P; Banyal, R. K; Thorngren, Daniel P (American Astronomical Society, 2023-01-01)
    We conducted the first dedicated search for signatures of exoplanet–exomoon interactions using the Giant Metrewave Radio Telescope (GMRT) as part of the radio-loud exoplanet-exomoon survey. Due to stellar tidal heating, ...
  • Radioheliograph observations of metric Type II bursts and the kinematics of coronal mass ejections 
    Ramesh, R; Kathiravan, C; Sreeja S. K; Gopalswamy, N (Institute of Physics, 2010-03-20)
    Assuming that metric type II radio bursts from the Sun are due to magnetohydrodynamic shocks driven by coronal mass ejections (CMEs), we estimate the average CME acceleration from its source region up to the position of ...
  • Radium and the chromosphere 
    Evershed, John (Taylor and Francis, 1912-10)
  • Rahu in the Burmese Tradition 
    Kochhar, R. K (Royal Astronomical Society, 1990-06)
  • Raman and Astronomy 
    Bappu, M. K. V (Indian Academy of Sciences, 1971-05)
  • The Raman effect and Krishnan's diary 
    Mallik, D. C. V (The Royal Society, 2000-01)
    K.S. Krishnan, F.R.S. (1898-1961) is one of the most distinguished Indian scientists of this century. His collaboration with Sir C.V. Raman on the scattering of light by liquids--a collaboration which Raman described as ...
  • Raman scattering of the synchrotron self-absorbed radiation in accretion discs 
    Krishan, V (Royal Astronomical Society, 1988-01)
    The quasar non-thermal continuum in the radio region can undergo Raman scattering in the accretion disc plasma around the central black hole provided that the frequency and the wave vector matching and the threshold ...
  • Rancho's Ladakh to house World's largest telescope 
    Ishfaq-ul-Hassan (DNA, Bangalore, 2012-01-07)
  • Random phase approximation for allowed and parity non-conserving electric dipole transition amplitudes and its connection with many-body perturbation theory and coupled-cluster theory 
    Gopakumar, G; Sur, C; Das, B. P; Chaudhuri, R. K; Mukherjee, D; Hirao, K (World Scientific Publishing Co, 2006)
    The connections between the Random Phase Approximation (RPA) and Many-Body Perturbation Theory (MBPT) and its all order generalization, the Coupled-Cluster Theory (CCT), have been explored. Explicit expressions have been ...
  • Range and frequency spread-F at Kodaikanal 
    Sastri, J. H; Sasidharan, K; Subramanyam, V; Srirama Rao, M (European Geophysical Society, 1979-09)
    Using ionogram data at Kodaikanal (geomagnetic lat. 06 deg N, Dip 3.5 deg N) over a seven year period, Jan. 1957-Dec. 1963, a study is made of the seasonal and sunspot cycle variations in the nocturnal occurrence of amplitude ...

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