Abstract
We present speckle observations of 48 double and multiple stars observed with the 2-meter \T elescope Bernard Lyot (TBL) in December 1995, January 1997 and June 1997. Angular separations, absolute position an- gles and relative photometry result from these observa- tions. New orbital elements have been recalculated for 8 double stars.
Highlights
We present speckle observations of 48 double and multiple stars observed with the 2-meter “Telescope Bernard Lyot” (TBL) in December 1995, January 1997 and June 1997
This paper presents the results of double and multiple star speckle observations performed with the 2 m Telescope Bernard Lyot of the Pic du Midi observatory (France)
Which agrees with our dynamic parallax. These observations have shown that the association of the speckle camera of Observatoire Midi-Pyrenees, the ICCD detector of Universite de Nice – Sophia Antipolis, and the reduction procedure we have been developing in the last few years is well adapted to binaries study
Summary
Data were recorded during three observing runs in December 1995, January 1997 and June 1997 at the TBL. Though at a lower speed (9 frames/s) the system is programmed to compute the cross correlation between the images and their square in order to find the absolute position angles of binaries (Aristidi et al 1997a). This system does not include yet the classification of images according to the seeing that is used in the data processing as described in Aristidi et al (1997b). The very poor atmospheric conditions did not allow us to use a time window larger than 2 msec (as the typical coherence time was less than 3 msec)
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