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A microcomputer controlled CCD H-alpha spectrometer

Published online by Cambridge University Press:  04 August 2017

David A. McDavid
David A. McDavid*
Affiliation:
Division of Earth and Physical Sciences, University of Texas at San Antonio San Antonio, Texas 78285

Abstract

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A miniaturized spectrometer designed for mounting at the Cassegrain focus of a 40 cm telescope has been built and laboratory tested with promising results. The optical system consists of a slit, spherical mirror, and reflection grating in a Littrow configuration. The detector is a 128 element linear CCD cooled by an evacuated microminiature nitrogen refrigerator and interfaced to a microcomputer using direct memory access. Laboratory spectra of a mercury vapor discharge tube have been obtained and demonstrate 1 Angstrom resolution with low noise. The spectral coverage of about 100 Angstroms is suitable for measurement of stellar H-alpha line profiles, and it is anticipated that the instrument can be used to monitor bright Be stars.

Type
III. Spectroscopic Research Programmes
Information
Symposium - International Astronomical Union , Volume 118: Instrumentation and Research Programmes for Small Telescopes , 1986 , pp. 457 - 458
Copyright
Copyright © Reidel 1986