10/11/13 22:46:06 wqpWXrJg
>>505
“Site testing in summer at Dome C, Antarctica” Aristidi E et al 2005
URLﾘﾝｸ(arxiv.org)
“We use Scmidt-Cassegrain Celestron C11 with x2 Barlow lens (...focal length 5600mm).
Optical tubes have been rebuilt in INVAR to reduce thermal dilatations...
...and the grease of the focus system have been replaced by a cold-resistant one (up to -90C).
These telescopes are placed on equatorial mounts AstroPhysics 900.
...some customization has been performed: grease was changed and heating systems were
placed in the motor carters. 低温環境でまず問題なのはグリスみたいね。>>509
Seeing data in 2002-2003, median value 1.19 arcsec
URLﾘﾝｸ(www-luan.unice.fr)
0.5 arcsec よりイイのは5%ないくらいのもんでしたね、研究としては残念な結果でした。
AP900って意外に軽いしそんなに高くないんでした。でも高橋以外の買うのって面倒臭いなぁ...