The Performance of MEFOS, the ESO Multi-Object Fibre Spectrograph

Details The Performance of MEFOS, the ESO Multi-Object Fibre Spectrograph The Performance of MEFOS, the ESO Multi-Object Fibre Spectrograph

1996-12-20

arxiv.org/abs/astro-ph/9612204v1

Exper.Astron. 7 (1997) 65-85

Astronomy and Astrophysics

Astrophysics

21 pages, including 9 encapsulated postscript figures, LaTex using kluwer.sty and psfig.sty, accepted for publication in Exper

Scientific paper

We are describing a new multi-fibre positioner, MEFOS, that was in general use at the La Silla Observatory, and implemented at the prime focus of the ESO 3.6 m telescope. It is an arm positioner using 29 arms in a one degree field. Each arm is equipped with an individual viewing system for accurate setting and carries two spectroscopic fibres, one for the astronomical object and the other one for the sky recording needed for sky subtraction. The spectral fibres intercept 2.5 arcsec on the sky and run from the prime focus to the Cassegrain, where the B&C spectrograph is located. After describing the observational procedure, we present the first scientific results.

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