Development of a Speckle Interferometer and the Measurement of Fried's Parameter (ro) at the Telescope Site View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1999-03

AUTHORS

S. K. Saha, G. Sudheendra, A. Umesh Chandra, V. Chinnappan

ABSTRACT

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. Provisions have been made for observation both at the prime focus (f/3,25), as well as at the Cassegrain focus (f/13) of the said telescope. The technical details of this sensitive instrument and the design features are described. An interface between the telescope and the afore-mentioned interferometer is made based on a concept of eliminating the formation of eddies due to the hot air entrapment. The performances of this instrument has been tested both at the laboratory, as well as at the Cassegrain end of the telescope. It is being used routinely to observe the speckle-grams of close-binary (separation < 1 arc second) stars. The size of the Fried's parameter, ro, is also measured. More... »

PAGES

39-49

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1008057218328

DOI

http://dx.doi.org/10.1023/a:1008057218328

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1005094557


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