Speckle observations of double stars with PISCO at Pic du Midi: Measurements in 1998

摘要

We present astrometric measurements of binary stars based on speckle observations of 164 independent sequences of observations (similar to 10(4) frames each) made with the PISCO speckle camera at Pic du Midi. These measurements concern 147 objects, of which 134 were found to be double with a separation in the range 0 " .1-1 " .10. These objects were mainly selected among grade 3 orbits to improve the accuracy of their orbits and to constrain their masses. We discovered the binarity of 59 Aql with an angular separation of 0 " .09 +/- 0".01. [References: 19]