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Proceedings Paper

Temperature control for the primary mirror and seeing statistics of the Subaru Telescope
Author(s): Akihiko Miyashita; Ryusuke Ogasawara; Naruhisa Takato; George Kosugi; Tadafumi Takata; Fumihiro Uraguchi
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Paper Abstract

Based on the successful numerical weather forecasting performed by collaboration between MKWC and Subaru Telescope, we develop a temperature control system of the primary mirror of the Subaru Telescope. Temperature forecast is accurate 80% in 2 degrees. After to start the operation, the temperature of the primary mirror controlled below 1 degree centigrade compare by the ambient night air temperature in over 70% probability. The effect of the temperature control for the improvement of the seeing of Subaru telescope seems to be moderately effective.The median of the seeing size of Subaru Telescope on May 2000 to July 2002 is 0.69 arcsec FWHM. We need further investigation whether the improvement is the result of our successful temperature control system of the primary mirror, or the effect of the annual variation of seeing itself. Thus, we need a long period data for verification the effect of the temperature control.

Paper Details

Date Published: 4 February 2003
PDF: 9 pages
Proc. SPIE 4837, Large Ground-based Telescopes, (4 February 2003); doi: 10.1117/12.458192
Show Author Affiliations
Akihiko Miyashita, National Astronomical Observatory of Japan (Japan)
Ryusuke Ogasawara, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Naruhisa Takato, Subaru Telescope/National Astronomical Observatory of Japan (United States)
George Kosugi, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Tadafumi Takata, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Fumihiro Uraguchi, Subaru Telescope/National Astronomical Observatory of Japan (United States)


Published in SPIE Proceedings Vol. 4837:
Large Ground-based Telescopes
Jacobus M. Oschmann; Larry M. Stepp, Editor(s)

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