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Browsing Publications of Astronomical Society of India by Author "Saha, S. K"

Browsing Publications of Astronomical Society of India by Author "Saha, S. K"

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  • Blind iterative deconvolution of binary star images 
    Saha, S. K; Venkatakrishnan, P (Astronomical Society of India, 1997)
    The technique of Blind Iterative De-convolution (BID) was used to remove the atmospherically induced point spread function (PSF) from short exposure images of two binary stars, HR 5138 and 5747 obtained at the cassegrain ...
  • Emerging trends of optical interferometry in astronomy 
    Saha, S. K (Astronomical Society of India, 1999)
    The current status of the high spatial resolution imaging interferometry in optical astronomy is reviewed in the light of theoretical explanation, as well as of experimental constraints that exist in the present day ...
  • Night time variation of Fried's parameter at VBT, Kavalur 
    Saha, S. K; Chinnappan, V (Astronomical Society of India, 1999)
    The night time variation of the Fried's parameter, r lower script o is measured on 28-29 March 1991, at the Cassegrain focus of 2.34 m Vainu Bappu Telescope (VBT), at Vainu Bappu Observatory (VBO), Kavalur, India, using ...
  • Performance of a speckle interferometer 
    Saha, S. K; Jayarajan, A. P; Sudheendra, G; Chandra, A. U (Astronomical Society of India, 1997)
    An interferometer system for use at the 2.34 meter Vainu Bappu Telescope (VBT), situated at Vainu Bappu Observatory (VBO), Kavalur, to obtain speckle-grams of astronomical objects in the visible wavelength, has been ...
  • Performance of the low light level CCD camera for speckle imagmg 
    Saha, S. K; Chinnappan, V (Astronomical Society of India, 2002-09)
    A new generation CCD detector caJ.led low light level OOD (L3CCD) that performs like an intensified CCD without incorporating a micro channel plate (MOP) for light amplification was procured and tested. A series of ...
  • Perspective of long baseline optical interferometry 
    Saha, S. K; Morel, S (Astronomical Society of India, 2000)
    This article is a sort of sequel of the earlier extensive review by Saha (1991a) where emphasis was laid down on the ground based single aperture, as well as on the working long baseline optical interferometers (LBI) ...
  • Speckle interferometric observations of close binary stars 
    Saha, S. K; Chinnappan, V; Yeshwanth, L; Anbazhagan, P (Astronomical Society of India, 2002-09)
    Speckle interferometric technique is employed to record a series of hundreds of short-exposure images of several close binary stars with sub-arc second separation through a narrow band filter at the Cassegrain focus of ...
  • Speckle interferometric observations of the collision of comet Shoemaker-Levy 9 with Jupiter 
    Saha, S. K; Rajamohan, R; Vivekananda Rao, P; Sunder, G. S; Swaminathan, R; Lokanandham, B (Astronomical Society of India, 1997)
    Speckle interferometric technique has been used to obtain a series of short exposure images of the collision of comet Shoemaker-Levy 9 with Jupiter during the period of July 17-24, 1994 using the Nasmyth focus of 1.2 meter ...

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