4 papers
Speckle interferometric observations of close binary stars
S. K. Saha, V. Chinnappan, L. Yeswanth +1
Speckle interferometric technique is employed to record a series of hundreds of short-exposure images of several close binary stars with sub-arcsecond separation through a narrow b…
Performance of the low light level CCD camera for speckle imaging
S. K. Saha, V. Chinnappan
A new generation CCD detector called low light level CCD (L3CCD) that performs like an intensified CCD without incorporating a micro channel plate (MCP) for light amplification was…
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…