A New Guider for the ESO 1-METER Schmidt Telescope

Details A New Guider for the ESO 1-METER Schmidt Telescope A New Guider for the ESO 1-METER Schmidt Telescope

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983msngr..33...26e&link_type=abstract

The Messenger, No.33, P.26, 1983

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Scientific paper

A new guider for the ESO 1 m Schmidt telescope was installed inside the telescope tube in June-July 1982. After about one year experience one can say that the system has proved to be very efficient. This device may be useful for other Schmidt telescopes where long exposures are hampered by guiding problems. Historically, the ESO Schmidt was equipped with two guiding telescopes of 20 cm diameter and 300 cm focallength. However, differential flexure between guiders and camera made long exposures impossible. Only a one-hour exposure, symmetrical with respect to the observer's meridian and using a low resolution 103 a-O or II a-O emulsion, was the very best one could obtain. To improve guiding conditions, two off-set guiders were constructed in succession and each one was used for a sufficiently long time to learn the requirements for an efficient off-set system. The new guider has its guide probe in the observer's meridian and at the North edge of the photographic plate. At this position the corrector plate is not vignetted by the main mirror's edge

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