Present performance of the dark-speckle coronagraph

Details Present performance of the dark-speckle coronagraph Present performance of the dark-speckle coronagraph

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..133..395b&link_type=abstract

Astronomy and Astrophysics Supplement, v.133, p.395-402

Astronomy and Astrophysics

Astrophysics

13

Planetary Systems, Stars: Delta Per, Eta Psc, Eta And, Instrumentation: Interferometers, Miscellaneous

Scientific paper

We present the recent developments of the dark speckle coronagraph and results obtained on two close binary stars. The central star is occulted by a Lyot coronagraphic system and the residual speckle pattern is detected on a photon-counting camera. Achromaticity is achieved across a wide spectral band, using a Wynne corrector. We observed the relatively faint companions of delta Per and eta Psc and give an independent estimate of their position and magnitude difference. Based on data collected at the Observatoire de Haute-Provence.

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