| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 133, Number 3, December II 1998
|
|
|---|---|---|
| Page(s) | 395 - 402 | |
| DOI | https://doi.org/10.1051/aas:1998329 | |
| Published online | 15 December 1998 | |
Present performance of the dark-speckle coronagraph*
1
DESPA, Observatoire de Paris-Meudon, 5 place J. Janssen, F-92195 Meudon, France
2
Collège de France, 11 place M. Berthelot F-75321 Paris, France
3
Observatoire de Haute-Provence, F-04870 St-Michel l'Observatoire, France
4
Observatoire de la Côte d'Azur, Département Fresnel, GI2T, F-06460 Saint Vallier de Thiey, France
Send offprint request to: A. Boccaletti
Received:
19
March
1998
Accepted:
17
June
1998
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 δ Per and η Psc and give an independent estimate of their position and magnitude difference.
Key words: planetary systems / stars: δ Per, η Psc, η And / instrumentation: interferometers; miscellaneous
© European Southern Observatory (ESO), 1998