Correcting the Pointing of the Durham Mark 6 Cherenkov Telescope

Abstract

The Durham Mark 6 Cherenkov telescope was established in Narrabri, NSW in 1995. The resolution of sensing the pointing direction was designed to be ˜ 1 arc-minute. The method used to calibrate and correct the pointing of the telescope in order to achieve an accuracy equivalent to the resolution is described in detail. A CCD camera was used to take regular images of the telescope’s field of view. These were combined with frequent measurements of the position of the brightest star in the field of view to calibrate absolute digital encoders on the telescope steering axes. The gravitational bending of the focal supports was allowed for.

Michael Aye
Michael Aye
Research Scientist in Planetary Science

My research interests include remote sensing of surfaces, related machine learning studies and open source software.

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