The University of Tasmania 1.04 M telescope

The University of Tasmania 1.04 m telescope is able to perform high dispersion spectroscopy as well as photometric observation. The optical design initially employed a coude focus with the first two mirrors producing a F/150 beam and later being converted up to a F/33 beam using a quartz/lithium fluoride lens. A folded Cassegrain focus with an F/No. of 11.3 and a scale of 55 microns/arc second has been added as well. The telescope is driven by stepping motors through worm/worm wheel reducers. For each axis one step of motor A corresponds to 0.5 arc second approximately, and one step of motor B corresponds to 0.05 arc second. For overall system control, the PDP8-F is used for positioning and motion control of the telescope and the LSI-11 is used for the storage and processing of data. The telescope instrumentation consists of a conventional photometer with UBURI filters and EMI 9658B photomultipliers. The coude spectrograph can obtain dispersions of 2.5 A/m on 7.5 magnitude stars.