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Proceedings Paper

Fabrication of FORTIS
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Paper Abstract

The Johns Hopkins University sounding rocket group is building the Far-ultraviolet Off Rowland-circle Telescope for Imaging and Spectroscopy (FORTIS), which is a Gregorian telescope with rulings on the secondary mirror. FORTIS will be launched on a sounding rocket from White Sand Missile Range to study the relationship between Lyman alpha escape and the local gas-to-dust ratio in star forming galaxies with non-zero redshifts. It is designed to acquire images of a 30' x 30' field and provide fully redundant "on-the-fly" spectral acquisition of 43 separate targets in the field with a bandpass of 900 - 1800 Angstroms. FORTIS is an enabling scientific and technical activity for future cutting edge far- and near-uv survey missions seeking to: search for Lyman continuum radiation leaking from star forming galaxies, determine the epoch of He II reionization and characterize baryon acoustic oscillations using the Lyman forest. In addition to the high efficiency "two bounce" dual-order spectro-telescope design, FORTIS incorporates a number of innovative technologies including: an image dissecting microshutter array developed by GSFC; a large area (~ 45 mm x 170 mm) microchannel plate detector with central imaging and "outrigger" spectral channels provided by Sensor Sciences; and an autonomous targeting microprocessor incorporating commercially available field programable gate arrays. We discuss progress to date in developing our pathfinder instrument.

Paper Details

Date Published: 30 July 2010
PDF: 12 pages
Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 773202 (30 July 2010); doi: 10.1117/12.857780
Show Author Affiliations
Stephan R. McCandliss, The Johns Hopkins Univ. (United States)
Brian Fleming, The Johns Hopkins Univ. (United States)
Mary Elizabeth Kaiser, The Johns Hopkins Univ. (United States)
Jeffrey Kruk, The Johns Hopkins Univ. (United States)
Paul D. Feldman, The Johns Hopkins Univ. (United States)
Alexander S. Kutyrev, NASA Goddard Space Flight Ctr. (United States)
Mary J. Li, NASA Goddard Space Flight Ctr. (United States)
Phillip A. Goodwin, NASA Goddard Space Flight Ctr. (United States)
David Rapchun, NASA Goddard Space Flight Ctr. (United States)
Eric Lyness, NASA Goddard Space Flight Ctr. (United States)
Ari D. Brown, NASA Goddard Space Flight Ctr. (United States)
Harvey Moseley, NASA Goddard Space Flight Ctr. (United States)
Oswald Siegmund, Univ. of California, Berkeley (United States)
John Vallerga, Univ. of California, Berkeley (United States)


Published in SPIE Proceedings Vol. 7732:
Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray
Monique Arnaud; Stephen S. Murray; Tadayuki Takahashi, Editor(s)

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