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D. Stern (JPL/Caltech), NuSTAR Team
NuSTAR, the Nuclear Spectroscopic Telescope Array, is a NASA Small Explorer (SMEX) mission currently under competitive phase A review, with an anticipated launch date in 2007-2008. NuSTAR will carry the first focusing hard X-ray (6-80 keV) telescope, providing 2 to 3 order of magnitude improvements to sensitivity and spectral resolution compared to previous missions at these energies. One of the primary goals of NuSTAR is to provide an accurate census of obscured AGN, probing the sources responsible for the X-ray background at the 30 keV energy where it peaks. Sensitive surveys by Chandra and XMM do not reach beyond 10 keV, and thus cannot detect sources with very heavy obscuration. A major component of the planned NuSTAR mission is to map the entire NDWFS Bootes field to 40 ks depth, reaching 5-sigma sensitivies of approximately 6e-15 erg/cm2/s.
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Bulletin of the American Astronomical Society, 36 #2
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