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Observations of QSOs and related objects with EFOSC, the ESO faint object spectrograph and camera

Published online by Cambridge University Press:  19 July 2016

S. D'Odorico ,
S. Cristiani ,
R.G. Clowes  and
C.J. Keable
S. D'Odorico
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-8046 Garching bei München, Federal Republic of Germany
S. Cristiani
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-8046 Garching bei München, Federal Republic of Germany
R.G. Clowes
Affiliation:
Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, U.K.
C.J. Keable
Affiliation:
Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, U.K.

Extract

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EFOSC is a standard ESO instrument operating at the Cassegrain focus of the 3.6 m telescope since April 1st, 1985. A description of its optical design and operating modes is given in Enard and Delabre (1982) and Dekker and D'Odorico (1985). Briefly, it is a focal reducer with spectroscopic capability. The collimator produces a collimated beam with a diameter of 40 mm which passes through a filter and/or grism. The f/2.5 camera focusses the beam on the detector which is at present a thinned, back-illuminated RCA CCD with 320×512 pixels. The pixel size is 30 μm which corresponds to .675″ on the sky. There are three remotely controlled wheels in the instrument: the aperture wheel in the focal plane of the telescope, with long slits of different widths, a filter and a grism wheel with 12 positions each. The instrument can be operated in four different modes: direct imaging, slit spectroscopy, grism or multiple object spectroscopy with specially made aperture plates.

Type
I. Surveys
Information
Symposium - International Astronomical Union , Volume 119: Quasars , 1986 , pp. 57 - 58
Copyright
Copyright © Reidel 1986 

References

Clowes, R.G., Cooke, J.A., and Beard, S.M. 1984, M.N.R.A.S. 207, 99.Google Scholar
Dekker, H., and D'Odorico, S. 1985, ESO Operating Manual #4.Google Scholar
Enard, D., and Delabre, B. 1982, Proc. SPIE 445, 522.CrossRefGoogle Scholar