Astron. Astrophys. Suppl. Ser.
Volume 125, Number 1, October I 1997
|Page(s)||175 - 182|
|Published online||15 October 1997|
A stellar coronograph for the COME-ON-PLUS adaptive optics system*
I. Description and performance
Laboratoire d'Astrophysique de l'Observatoire de Grenoble, UMR 5571, Université J. Fourier, BP. 53, F-38041 Grenoble Cedex 9, France
2 DESPA, Observatoire de Paris, URA 264, Place J. Janssen, F-92195 Meudon Cedex, France
Send offprint request to: J.-L. Beuzit
Accepted: 19 December 1996
The detection of faint emissions very close to much brighter objects is required in several different fields of astrophysics, for example in the search for planetary disks. We present here a coronograph that we built to work with , the ESO adaptive optics system, high angular resolution being of key importance in allowing observations close to a central, occulted object. The first results are presented and analyzed in order to establish the performance of this instrument in terms of contrast and detectability of faint emissions close to a central star.
Key words: atmospheric effects / methods: data analysis / instrumentation: miscellaneous / stars:circumstellar matter
© European Southern Observatory (ESO), 1997