13 September 2011 Fabrication and calibration of FORTIS
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Abstract
The Johns Hopkins University sounding rocket group is entering the final fabrication phase of the Far-ultraviolet Off Rowland-circle Telescope for Imaging and Spectroscopy (FORTIS); a sounding rocket borne multi-object spectro-telescope designed to provide spectral coverage of 43 separate targets in the 900 - 1800 Angstrom bandpass over a 30' x 30' field-of- view. Using "on-the-fly" target acquisition and spectral multiplexing enabled by a GSFC microshutter array, FORTIS will be capable of observing the brightest regions in the far-UV of nearby low redshift (z ~ 0.002 - 0.02) star forming galaxies to search for Lyman alpha escape, and to measure the local gas-to-dust ratio. A large area (~ 45 mm x 170 mm) microchannel plate detector built by Sensor Sciences provides an imaging channel for targeting flanked by two redundant spectral outrigger channels. The grating is ruled directly onto the secondary mirror to increase efficiency. In this paper, we discuss the recent progress made in the development and fabrication of FORTIS, as well as the results of early calibration and characterization of our hardware, including mirror/grating measurements, detector performance, and early operational tests of the microshutter arrays.
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Brian T. Fleming, Brian T. Fleming, Stephan R. McCandliss, Stephan R. McCandliss, Mary Elizabeth Kaiser, Mary Elizabeth Kaiser, Jeffery Kruk, Jeffery Kruk, Paul D. Feldman, Paul D. Feldman, Alexander S. Kutyrev, Alexander S. Kutyrev, Mary J. Li, Mary J. Li, David A. Rapchun, David A. Rapchun, Eric Lyness, Eric Lyness, S. H. Moseley, S. H. Moseley, Oswald Siegmund, Oswald Siegmund, John Vallerga, John Vallerga, Adrian Martin, Adrian Martin, } "Fabrication and calibration of FORTIS", Proc. SPIE 8145, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII, 81450B (13 September 2011); doi: 10.1117/12.894080; https://doi.org/10.1117/12.894080
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