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  • RS Ophiuchi: radio lightcurve development following the 2006 outburst 
    Eyres, S. P. S; Rushton, M; O'Brien, T. J; Beswick, R; Muxlow, T. W. B; Davis, R; Anupama, G. C; Kantharia, N. G; Bode, M; Gawroñski, M. P; Feiler, R; Evans, A (Astronomical Society of a Pacific, 2009-01)
    We report GHz observations beginning 4.5 days after the discovery of RS Ophiuchi undergoing its 2006 recurrent nova outburst. Observations over the first 60 days are included, enabling us to follow spectral development ...
  • The Rumford spectroheliograph of the Yerkes observatory 
    Evershed, John (Taylor and Francis, 1904-04)
  • Runaway stars as witnesses to supernova explosions 
    Kochhar, R. K (Nature Publishing Group, 1978-02)
    A hypothesis is proposed according to which single runaway stars are released from close binaries in which the companion star explodes as a carbon detonation supernova and is totally disrupted. From the stars which can ...
  • RXTE Observations of Magnetic Cataclysmic Variables 
    Rana, V. R; Singh, K. P (Astronomical Society of India, 2003)
    Results from hard X-ray observations with RXTE of 5 Polar systems-V2301 Oph, V1432 Aql, EP Dra, GG Leo and V834 Cen, and an Intermediate Polar TV Col are presented. An improved ephemeris for V2301 Oph using mid-eclipse ...
  • S stars and s-process in the Gaia era I. Stellar parameters and chemical abundances in a sub-sample of S stars with new MARCS model atmospheres 
    Shetye, S; Van Eck, S; Jorissen, A; Van Winckel, H; Siess, L; Goriely, S; Escorza, A; Drisya, K; Plez, B (EDP Sciences, 2018-12)
    Context. S stars are transition objects between M-type giants and carbon stars on the asymptotic giant branch (AGB). They are characterized by overabundances of s-process elements. Roughly half of them are enhanced in ...
  • S7 : Probing the physics of seyfert galaxies through their ENLR & HII regions 
    Dopita, M. A; Shastri, P; Scharwachter, J; Kewley, L. J; Davies, R; Sutherland, R; Kharb, P; Jose, Jessy; Bhatt, H. C; Ramya, S; Hamptona, E; Jina, C; Banfielda, J; Zawa, I; Srivastavaa, Shweta; Jamesa, B (Cambridge University Press, 2015-02)
    Here we present the first results from the Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7) which aims to investigate the physics of ∼140 radio-detected southern active Galaxies with z<0.02 through Integral ...
  • Salient mechanical and optical design features of 25m-diameter light-collector of MACE imaging Gamma-Ray Telescope 
    Bandyopadhayay, K; Koul, D. K; Mishra, V. K; Koul, R; Suthar, R. L; Koul, M. K; Jayandranath, M; Bhat, C. L (Astronomical Society of India, 2000)
    A low-threshold energy, high-sensitivity gamma-ray telescope, MACE (for Major Atmospheric Cerenkov Experiment) is proposed to be built in India for explorations of gamma-ray sky in 100's keV - 10's GeV photon energy range, ...
  • Salient mechanical design features of the proposed 17 meter diameter MACE imaging gamma-ray telescope 
    Suthar, R. L; Guha, S; Bandopadhyay, K; Mishra, V. K; Koul, R; Bhat, C. L (Astronomical Society of India, 2002)
    A low-threshold energy, high-sensitivity gamma-ray telescope, MACE (for Major Atmospheric Cerenkov Experiment) is proposed to be built in India for explorations of gamma-ray sky in 100's keV - 10's GeV photon energy range, ...
  • SALT revisits DY Cen: a rapidly evolving strontium-rich single helium star 
    Jeffery, C. S; Kameswara Rao, N; Lambert, D. L (Oxford University Press on behalf of the Royal Astronomical Society, 2020-04)
    The hydrogen-deficient star DY Cen has been reported as an R CrB-type variable, an extreme helium star (with some hydrogen), and as a single-lined spectroscopic binary. It has been associated with a dramatic change in ...
  • A SALT spectral study of S0s hosting pseudobulges 
    Vaghmare, K; Barway, Sudhanshu; Vaisanen, Petri; Ramphul, Rajin; Wadadekar, Yogesh; Kembhavi, Ajit K (Oxford University Press on behalf of the Royal Astronomical Society, 2018-11)
    We present a SALT-RSS spectroscopic study of a sample of S0 galaxies established by Vaghmare et al. (2015) as having pseudobulges using a combination of photometric criteria. We extract the spectra of various regions along ...
  • Samanta Chandra Sekhar : The great naked eye astronomer 
    Naik, P. C; Satpathy, L (Astronomical Society of India, 1998-03)
    Samanta Chandra Sekhar (1835-1904), popularly known as Pathani Samabta in Orissa, worked in astronomy following traditional methods, completely unaware of the telescope and other aids developed in the west. He took ...
  • SAO 244567 - A post-AGB star which has turned into a planetary nebula within the last 40 years 
    Parthasarathy, M; Garcia-Lario, P; Pottasch, S. R; Manchando, A; Clavel, J; de Martino, D; Van de Steene, G. C. M; Sahu, K. C (European Sothern Observatory, 1993-01)
    SAO 244567 (Hen 1357 = CPD -59 deg 6926 = IRAS 17119-5926) is an IRAS source with far infrared colors and flux distribution similar to those of planetary nebulae. The IUE ultraviolet spectra obtained in July 1988 and April ...
  • SAO 75669: A late type giant behind the molecular cloud MBM 12 
    Bhatt, H. C; Sagar, R; Subramaniam, A; Gorti, U; Chandrasekhar, T; Ashok, N. M; Ragland, S (European Southern Observatory, 1994-09)
    Photometric and spectroscopic observations of the star SAO 75669 in the region of the high galactic latitude molecular cloud MBM 12 are presented. The optical, near-infrared and far-infrared IRAS photometric magnitudes ...
  • Satellite Radio Beacon Study of the Ionospheric Variations at Hyderabad during the Total Solar Eclipse of Februrary 16, 1980 
    Tyagi, Tuhi Ram; Singh, Lakha; Vijaykumar, P. N; Somayajulu, Y. V; Lokanadham, B; Yellaiah, G (Tata Institute of Fundamental Research, Bombay, 1980-06)
    Preliminary results of observations, made on the eclipse day (Feb. 16, 1980) at Hyderabad, on the amplitude and phase of 136 MHz transmissions of the geostationary satellite ETS-II are presented by the eclipse. The percentage ...
  • Saturn and His System 
    Raman, C. V (Astronomical Society of India, 1915)
  • Saturn in a small telescope 
    Raman, C. V (Astronomical Society of India, 1914-04)
  • 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 ...
  • Scalable platform for adaptive optics real-time control, part 1: concept, architecture, and validation 
    Surendran, Avinash; Burse, Mahesh P.; Ramaprakash, A. N; Paul, Jyotirmay; Das, Hillol K.; Parihar, P. S (SPIE-Society of Photo-Optical Instrumentation Engineers, 2018-07)
    We demonstrate an architecture for adaptive optics (AO) control based on field programmable gate arrays (FPGAs), making active use of their configurable parallel processing capability. The unique capabilities of scalable ...
  • Scalable platform for adaptive optics real-time control, part 2: field programmable gate array implementation and performance 
    Surendran, Avinash; Burse, Mahesh P.; Ramaprakash, A. N; Parihar, P. S (SPIE-Society of Photo-Optical Instrumentation Engineers, 2018-07)
    The next generation of adaptive optics (AO) systems on large telescopes will require immense computation performance and memory bandwidth, both of which are challenging with the technology available today. The objective ...
  • Scale transformations and evolution of the early universe 
    Sivaram, C (Springer, 1993-09)
    The notion of discrete scale transformations is invoked to suggest strong links between fundamental interactions and cosmology giving rise to a hierarchy of cosmic scales.

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