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Performance of a speckle interferometer
S K Saha, A P Jayarajan, G Sudheendra +1
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…
Blind iterative deconvolution of binary star images
S. K. Saha, P. Venkatakrishnan
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…
A Speckle Experiment during the Partial Eclipse
S. K. Saha, B. S. Nagabhushana, A. V. Ananth +1
An experiment for the speckle reconstruction of solar features was developed for observing the partial eclipse of the sun as viewed from Bangalore on October 24, 1995. No data coul…
Night time variation of Fried's parameter at VBT, Kavalur
S. K. Saha, V. Chinnappan
The night time variation of the Fried's parameter, r is measured on 28-29 March 1991, at the Cassegrain focus of 2.34 m Vainu Bappu Telescope (VBT), at Vainu Bappu Observator…
Development of a Speckle Interferometer and the Measurement of Fried's Parameter (r) at the Telescope Site
S. K. Saha, G. Sudheendra, A. Umesh Chandra +1
A new optical speckle interferometer for use at the 2.34 meter Vainu Bappu Telescope (VBT), at Vainu Bappu Observatory (VBO), Kavalur, India, has been designed and developed. Provi…
Emerging trends of optical interferometry in astronomy
S. K. Saha
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 constr…