Abstract

VOITSEKHOVICH, V. V.  and  ORLOV, V. G.. Temporal properties of the brightest speckle. Rev. mex. astron. astrofis [online]. 2014, vol.50, n.1, pp.37-40. ISSN 0185-1101.

The experimental results related to the temporal properties of the brightest speckle are presented. The analysis of the data shows that the lifetime of the brightest speckle, defined as a correlation time at the one-half height of the temporal correlation function, is about 20 ms. The shortest lifetime which we observed is about 7 ms while the longest is about 70 ms. The comparison of the results obtained in three filters allows us to conclude that the life time of the brightest speckle decreases with decreasing wave length. Also a comparison of the lifetime of the brightest speckle to the correlation time of the image centroid is performed. The comparison shows that the correlation time of the image centroid is approximately 10 times longer than the lifetime of the brightest speckle.

Keywords : techniques [high angular resolution]; techniques [interferometric].

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