Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21743304s&link_type=abstract
American Astronomical Society, AAS Meeting #217, #433.04; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
The Wide-Field Infrared Survey Telescope mission (WFIRST) combines a wide field imager and a wide field slitless spectrometer. It is intended to study dark energy via measurement of the expansion history of the universe and the growth of large-scale structure, and to provide tight constraints on the equation of state of dark energy and test the validity of general relativity. In addition, this mission will survey the Galactic Bulge for exoplanet microlensing events, delivering a rapid reobservation cadence for extended periods of time. During this past year we have developed optical techniques that deliver a well-corrected long focus image field simultaneously with a short focus spectroscopic field using a corrected prism disperser and a focal reducer. This advance allows unprecedented survey rates for combined BAO and WL surveys. Other payload features allow extended dwell times on the Galactic Bulge for microlensing. We present four practical implementations of the WFIRST payload that can meet the anticipated mission requirements. Options for simultaneous or staggered imaging and spectroscopy as well as the required plate scale change with a focal TMA are presented along with payload accommodation study results.
Lampton Michael L.
Levi Michael E.
Sholl Michael
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