AAS 201st Meeting, January, 2003
Session 92. The SNAP Observatory
Poster, Wednesday, January 8, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[92.03] The SNAP Focal Plane

C.J. Bebek (Lawrence Berkeley National Laboratory), SNAP Collaboration

The SuperNova/Acceleration Probe (SNAP) science program requires photometric discovery and detailed follow-up observations of at least 2000 Type Ia supernovae with redshifts ranging from 0.3 to 1.7. The data are sent to the ground station and analyzed every few days in order to schedule a spectroscopic measurement near peak luminosity. The SNAP imager has a large, 0.7 square degree instrumented field of view and is comprised of CCD and MCT devices to span the wavelength range of 350 nm to 1700 nm. A 2D-symmetric array of 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 science requirements and satellite operational constraints that lead to this particular focal plane configuration will be described. The R&D activities we are undertaking to insure timely availability of the CCD and MCT sensors will also be presented.

This work has been supported by the U.S. Dept. of Energy, Office of Science, under contract DE-AC03-76SF00098.

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