Share Email Print
cover

Proceedings Paper

ARAL: a facility to fuel VLTI instruments with photons
Author(s): Sebastien Morel; Martin Vannier; Serge Menardi; Fabio Biancat-Marchet; Michael D. Fischer; Philippe B. Gitton; Andreas Glindemann; Stephane Guisard; Nicholas Haddad; Nico Housen; Alexis Huxley; Mario Kiekebusch; Antonio Longinotti; Thanh Phan Duc; Markus Schoeller; Anders Wallander
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The ARAL system of the VLTI is a multipurpose facility that helps to have the interferometric instruments ready for night observations. It consists of an artificial source (allowing a Mach-Zehnder mode of the interferometric instruments for autotest), an alignment unit (verifying the position of the celestial target in the VLTI field-of-view), and an optical path router (controlling the optical switchyard and the instrument feeding-optics in the VLTI laboratory). With the multiplication of VLTI instruments and their specific features (wavelength coverage, number of beams), an upgrade of ARAL (from its November 2002 version) had to be carried out: the alignment unit has been redesigned, as well as the artificial source. This source will provide a point in the visible and in J, H, K and N infrared bands, split into four beams (with a zero optical path difference at the reference position). After a description of the optomechanics and of the computer architecture of ARAL, we detail the difficulties of building an interferometric artificial source with a wide spectral range.

Paper Details

Date Published: 20 October 2004
PDF: 10 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.550175
Show Author Affiliations
Sebastien Morel, European Southern Observatory (Chile)
Martin Vannier, European Southern Observatory (Chile)
Serge Menardi, European Southern Observatory (Germany)
Fabio Biancat-Marchet, European Southern Observatory (Germany)
Michael D. Fischer, European Southern Observatory (Chile)
Philippe B. Gitton, European Southern Observatory (Germany)
Andreas Glindemann, European Southern Observatory (Germany)
Stephane Guisard, European Southern Observatory (Chile)
Nicholas Haddad, European Southern Observatory (Chile)
Nico Housen, European Southern Observatory (Chile)
Alexis Huxley, European Southern Observatory (Germany)
Mario Kiekebusch, European Southern Observatory (Chile)
Antonio Longinotti, European Southern Observatory (Germany)
Thanh Phan Duc, European Southern Observatory (Germany)
Markus Schoeller, European Southern Observatory (Chile)
Anders Wallander, European Southern Observatory (Germany)


Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

© SPIE. Terms of Use
Back to Top