Sloan Digital Sky Survey Telescope Technical Note 19980416 . ... The common corrector . ... The Sloan Digital Sky Survey (SDSS) 2.5-meter telescope optical design is optimized for wide field (3њ), broadband (300 nm to 1060 nm) CCD imaging and multi-fiber spectroscopy. ... The second corrector element figure is in the negative of the usual form and placed closer to the focal plane. ... Grind and figure flat silica corrector for the Sloan Digital Sky Survey Telescope - Corrector Final Report", (1997). ...
Conformal Geometry and the Universe B y Anthony Lasenby Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, UK The conformal approach to Euclidean geometry introduced by David Hestenes, uses null vectors in an enlarged space to represent points. ... The conformal model for the geometry of Euclidean space was introduced by David Hestenes (Hestenes 2001), and has been discussed further by several authors (see e.g. Lasenby & Lasenby 2000 and Hestenes et al. ...
... Soc. 339, 524н536 (2003) Anatomy of the HerbigнHaro object HH7 bow shock Michael D. Smith, 1 2 1 Tigran Khanzadyan 1 and Christopher J. Davis2 Armagh Observatory, Armagh, Northern Ireland, BT61 9DG пп Joint Astronomy Centre, 660 N. A'ohoku Place, University Park, Hilo, Hawaii 96720, USA Accepted 2002 October 18. ... We first present molecular hydrogen images in the 2н1 S(1) and 1н0 S(1) K -band emission lines. ... 3 OBSER VA TION AL RESUL TS Fig. 1 displays the HH7 bow shock in detail. ...