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Proceedings Paper

Application Of A Dual-Array Self-Scanned Digicon To Faint Object Spectroscopy
Author(s): Robert G. Tull; Steven S. Vogt; Phillip W. Kelton
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Paper Abstract

A series of Self-Scanned Digicon image detectors has been constructed in which the target of the photoelectron imaging section is a Reticon type RL-1872F self-scanned photodiode array modified as a 2 X 936-element dual array. This paper describes an application in which the dual array is used for simultaneous spectroscopy of a faint object and a neighboring patch of skylight, Performance in this application has been tested using a Cassegrain spectrograph built for these tests and the 2.1 m Struve telescope at McDonald Observatory. Tests performedduring the course of several observing programs have demonstrated that subtraction of background skylight is complete to within limits set by photoelectron shot noise. Radial velocities of galaxies have been measured to a precision of ± 34 km/sec to v = 13,700 km/sec. The paper describes the detector, the spectrograph, the observing techniques, and the observational results.

Paper Details

Date Published: 3 May 1979
PDF: 8 pages
Proc. SPIE 0172, Instrumentation in Astronomy III, (3 May 1979); doi: 10.1117/12.957072
Show Author Affiliations
Robert G. Tull, The University of Texas at Austin (United States)
Steven S. Vogt, The University of Texas at Austin (United States)
Phillip W. Kelton, The University of Texas at Austin (United States)

Published in SPIE Proceedings Vol. 0172:
Instrumentation in Astronomy III
David L. Crawford, Editor(s)

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