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Browsing IIAP Publications by Author "Iyengar, K. V. K"

Browsing IIAP Publications by Author "Iyengar, K. V. K"

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  • BVRI photometry of a few `unidentified' IRAS sources 
    Iyengar, K. V. K; Parthasarathy, M (EDP Sciences, 1997-01)
    We selected 33 unidentified IRAS sources based on the following criteria: i) galactic latitude more than 2 deg, ii) have flux density higher than 1 Jy at 12 microns, iii) have good fluxes at 12, 25, and 60 microns with ...
  • Far-infrared and radio continuum properties of spiral galaxies in clusters 
    Rengarajan, T. N; Karnik, A. D; Iyengar, K. V. K (The Royal Astronomical Society, 1997-09)
    Data on the far-infrared (FIR) and radio continuum properties of spiral galaxies in several clusters have been collected from the literature. To assess the effect of the cluster environment on the FIR and radio continuum ...
  • Near-simultaneous Spectroscopic and Broadband Polarimetric Observations of BE Stars 
    Ghosh, K; Iyengar, K. V. K; Ramsey, B. D; Austin, R. A (The American Astronomical Society, 1999-08)
    Near simultaneous optical spectroscopic (on four nights) and broadband linear continuum (B, V, R,and I bands) polarimetric (on seven nights) observations of 29 Be stars were carried out during 1993November-December. The ...
  • Rapid searches for counterparts of GRB 930131 
    Schaefer, Bradley. E; Barthelmy, Scott. D; Palmer, David. M; Cline, Thomas. L; Hurley, Kevin. C; Sommer, Michael; Boer, Michel; Niel, Michel; Fishman, Gerald. J; Kouveliotou, Chryssa; Meegan, Charles. A; Coe, M. J; Elmegreen, Bruce. G; McNamara, Bernard. J; Harrison, Thomas; Owens, Alan; Sollee, Neyle; Stull, John; Palermiti, Michael; Schwartz, Richard; Brooks, Jack; Vanderspek, Roland; Ricker, George. R; Krimm, Hans. A; Wenzel, Wolfgang; Greiner, Jochen; Hudec, Rene; Novak, Miroslav; Borovicka, Jiri; Predota, Miroslav; Bailyn, Charles. D; Hanlon, Lorraine. O; Bennett, K; Spoelstra, Titus. A. Th; Smette, Alain; Pedersen, Holger; Florentin, Ralph; Pollas, Christian; Steinle, Helmut; Schramm, K. J; Iyengar, K. V. K; Prabhu, T. P (American Astronomical Society, 1994-02)
    A fading counterpart to a gamma-ray burst (GRB) would appear as a point source inside a GRB error region soon after the burst which dims on a timescale from minutes to days. The favorable circumstances of the burst GRB ...
  • Simultaneous infrared and H-alpha measurements of Be stars 
    Apparao, K. M. V; Tarafdar, S. P; Verma, R. P; Iyengar, K. V. K; Ghosh, K. K (Indian Academy of Sciences, 1993)
    The observed infrared excess in Be stars is usually interpreted as free-free and free-bound emission from a hot gas envelope around the Be star. This hot gas should also emit H-alpha line radiation. Earlier observations ...
  • Spectral classification of unidentified IRAS sources with F{_nu }(12 μm) >= F{_nu }(25 μm) 
    Iyengar, K. V. K; MacConnell, D. J (The European Southern Observatory, 1998-12)
    Spectral types of a large number of unidentified IRAS Point Sources with F{_nu }(12 μm) >= F{_nu }(25 μm) were determined; the majority are faint, oxygen-rich (M-type) or carbon-rich giant stars. The Guide Star Catalog has ...

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