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Fabrication and Calibration of FORTISThe 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 approximately 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 (approximately 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 micro shutter arrays.
Document ID
20120017018
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fleming, Brian T.
(Johns Hopkins Univ. Baltimore, MD, United States)
McCandliss, Stephan R.
(Johns Hopkins Univ. Baltimore, MD, United States)
Kaiser, Mary Elizabeth
(Johns Hopkins Univ. Baltimore, MD, United States)
Kruk, Jeffery
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Feldman, Paul D.
(Johns Hopkins Univ. Baltimore, MD, United States)
Kutyrev, Alexander S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Li, Mary J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Rapchun, David A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lyness, Eric
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Moseley, S. H.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Siegmund, Oswald
(Sensor Sciences, LLC Pleasant Hill, CA, United States)
Vallerga, John
(Sensor Sciences, LLC Pleasant Hill, CA, United States)
Martin, Adrian
(Sensor Sciences, LLC Pleasant Hill, CA, United States)
Date Acquired
August 25, 2013
Publication Date
August 21, 2011
Publication Information
Publication: UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII Proceedings
Volume: 8145
Subject Category
Instrumentation And Photography
Report/Patent Number
GSFC.JA.6630.2012
Distribution Limits
Public
Copyright
Other

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