Image Quality of the 3.6-m Telescope (Part VIII) New Seeing Record of 0.47"

Details Image Quality of the 3.6-m Telescope (Part VIII) New Seeing Record of 0.47" Image Quality of the 3.6-m Telescope (Part VIII) New Seeing Record of 0.47"

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998msngr..91r..24g&link_type=abstract

The Messenger, vol. 91, p. 24-24

Physics

Scientific paper

The bad behaviour of the lateral pneumatic support of the main mirror (M1) has already been put forward several times to explain the bad image quality of the telescope at large zenith distance. In order to check this assumption, several adjustments were done on the primary mirror support during the technical time last December. We decided to start by recentring the mirror axis on the rotator axis. This was done successfully and we found that the old position of the mirror was about 2 mm away from the rotator axis position. All the lateral pads supports were modified, and it is now possible to adjust them radially to match the new mirror position.

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