Peter J. McGregor , Peter Conroy , Jan van Harmelen , Michael S. Bessell, PASA, 17 (1), 102.
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Title/Abstract Page: A New Acquisition and
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Introduction
The Double Beam Spectrograph (DBS; Rodgers, Conroy, & Bloxham 1988) is the premier instrument on the Australian National University (ANU) 2.3б m telescope. It can measure low resolution spectra of objects down to 
б mag. The acquisition system used with this instrument until recently has been based on a Fairchild intensified CCD camera. This system suffered from 1) high dark current in warm weather, 2) high pattern noise with a moonlit sky, and 3) the lack of an autoguiding capability. Consequently, the performance of the DBS on faint objects typically measured at low spectral resolution was limited by the capabilities of the acquisition system.
This system has recently been replaced by an Apogee Instruments Inc. model AP7 direct CCD camera which is controlled by the MaxIm CCD camera control and image processing software developed by Diffraction Ltd. in Canada. This paper describes the factors used to select the AP7 camera, and its operation and performance for acquisition and autoguiding with the DBS. The camera has been so successful on the DBS that recently it was adapted for use with the Nasmyth B Imager on the 2.3б m telescope as well.
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Title/Abstract Page: A New Acquisition and
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