IAU01965
Presentation type requested: POSTER
THE SNAP OBSERVATORY
Susana Deustua
American Astronomical Society
The SNAP science program to map the expansion history of the universe requires photometric discovery and detailed multiband photometric and spectroscopic follow-up observations of at least 2000 Type Ia supernovae with redshifts spanning the range z=0.3-1.7. The SNAP conceptual design consists of a wide-field (approximately one degree) diffraction limited telescope with a 2-meter primary. Its half-billion-pixel imaging and spectrographic system is comprised of state-of-the-art visible and infrared sensors sharing a large focal plane. CCD and HgCdTe devices will span the wavelength range of 350 nm to 1700 nm. An array of 9 fixed filters is deployed over the sensors and the focal plane is operated in a step-and-stare mode to perform broadband photometry over fixed regions of the sky. The spectrograph (R~100) is equipped with an image slicer to accommodate a working field of 3 x 3 arcseconds, offering high throughput over the entire 350-1700nm waveband. After the primary science mission, the facility will be available for guest survey proposals. for the SNAP Collaboration
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