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Proceedings Paper

AVES: an adaptive optics visual echelle spectrograph for the VLT
Author(s): Luca Pasquini; Bernard Delabre; Gerardo Avila; Domenico Bonaccini
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Paper Abstract

We present the preliminary study of a low cost, high performance spectrograph for the VLT, for observations in the V, R and I bands. This spectrograph is meant for intermediate (R equals 16,000) resolution spectroscopy of faint (sky and/or detector limited) sources, with particular emphasis on the study of solar-type (F-G) stars belonging to the nearest galaxies and to distant (or highly reddened) galactic clusters. The spectrograph is designed to use the adaptive optics (AO) systems at the VLT Telescope. Even if these AO systems will not provide diffraction limited images in the V, R and I bands, the photon concentration will still be above approximately 60% of the flux in an 0.3 arcsecond aperture for typical Paranal conditions. This makes the construction of a compact, cheap and efficient echelle spectrograph possible. AVES will outperform comparable non adaptive optic instruments by more than one magnitude for sky- and/or detector-limited observations, and it will be very suitable for observations in crowded fields.

Paper Details

Date Published: 9 July 1998
PDF: 6 pages
Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); doi: 10.1117/12.316811
Show Author Affiliations
Luca Pasquini, European Southern Observatory (Germany)
Bernard Delabre, European Southern Observatory (Germany)
Gerardo Avila, European Southern Observatory (Germany)
Domenico Bonaccini, European Southern Observatory (Germany)


Published in SPIE Proceedings Vol. 3355:
Optical Astronomical Instrumentation
Sandro D'Odorico, Editor(s)

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