This paper presents the results of double star speckle observations
performed at the 2m Télescope Bernard Lyot (TBL) of Pic du Midi
observatory (France). Bright and well-resolved binaries were chosen for the
first observing run in 1994. In 1995, we measured long-period double stars
for which the published orbit had to be revisited. One of the speckle
analysis method used is based upon the computation of probability density
functions of the intensity of the specklegrams (Carbillet et al.
1996b). Its major capability is to give an accurate relative
photometry of double stars. Our work is the first routine application of
this technique developed by the Probability Imaging group of Nice
University. Relative photometry computed this way is found to be consistent
with direct imaging reconstruction obtained from bispectral techniques.
Absolute position angles (
) were calculated using a
cross-correlation technique (Aristidi et al. 1997).
This paper is organized as follows: Sect. 2 presents the instrumentation and the list of observed objects together with observing conditions. Section 3 details the data reduction and the speckle methods used. Section 4 summarizes the results and gives a comparison between observed and predicted binary star separations and position angles.