Lawrence William Ramsey, D. W. Weedman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


To map the distribution of galaxies and quasars in the universe, we desire a telescope large enough to obtain spectra to about 20th magnitude in under 20 minutes integration and which is devoted entirely to such spectroscopic survey projects in dark time. We also desire extensive bright time observing to monitor large numbers of G-M stars with high-resolution spectroscopy for many years in search of solar-like activity. These projects are suited to a telescope with a large fixed primary, assembled from many spherically figured segments. We present a design for such a telescope that consists of 73 segments, each of 0. 9-m diameter and 26-m radius of curvature. Mirror blanks of this size can be cut from standard Pyrex sheets. Effective aperture of the telescope exceeds 7-m; the focal plane system can track objects for 40 minutes, and sky coverage of 48 degrees is obtained by using a fixed tilt for the primary and making the entire telescope and dome rotatable.

Original languageEnglish (US)
Title of host publicationUnknown Host Publication Title
PublisherEuropean Southern Observatory (IAU Colloquium n 79), Garching
Number of pages10
ISBN (Print)3923524196
StatePublished - 1984

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Ramsey, L. W., & Weedman, D. W. (1984). PENN STATE SPECTROSCOPIC SURVEY TELESCOPE. In Unknown Host Publication Title (pp. 851-860). European Southern Observatory (IAU Colloquium n 79), Garching.