| タイトル | Coronagraphic Observations of Lunar Sodium |
| 本文（外部サイト） | http://hdl.handle.net/2060/19980201076 |
| 著者（英） | Hunten, D. M.; Sprague, A. L. |
| 著者所属（英） | Arizona Univ. |
| 発行日 | 1997-09-10 |
| 言語 | eng |
| 内容記述 | The core of the proposed work was to observe the lunar sodium atmosphere with our classical Lyot coronagraph and specially-built grating spectrograph on Mount Lemmon, a 9400-foot peak about an hour's drive from Tucson. It is optimized for low scattered light and for observing from the Moon's limb to an altitude of approx. 1 lunar radius. The grating has 600 lines/mm and a blaze angle of 49 deg, and is used with a somewhat wide slit at a resolving power of about 5000. It is called DARRK for the initials of the people who designed it. The rejection of stray light from the Moon's disk is spectacularly good: when the sky is clear this light is absent right up to a few arcsec from the limb. We use an excellent 1024 by 1024 pixel CCD camera, operated at -100 C; the exposures are 10 to 30 min. Data reduction is done with ERAF running on a Sun Sparcstation. |
| NASA分類 | Astronomy |
| レポートNO | NASA/CR-97-205953
NAS 1.26:205953 |
| 権利 | No Copyright |
|
