Multiband imaging with Fresnel x-ray telescopes

Details Multiband imaging with Fresnel x-ray telescopes Multiband imaging with Fresnel x-ray telescopes

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7732e..84b&link_type=abstract

Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray. Edited by Arnaud, Monique; Murray, Stephen S.; Takahashi,

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We present a diffractive-refractive X-ray telescope for simultaneous imaging in multiple energy bands. Based on segmented dispersion corrected hybrid lenses, the system yields an angular resolution around 1 mas for photon energies between 5 and 10 keV. The total sensitivity, measured in terms of effective area times spectral bandwidth, reaches several 103 cm2 keV. The suggested arrangement exploits Fresnel lenses used in higher diffraction orders for orderly protection from scattered radiation as well as reduced refractive profiles for an enhanced throughput. With a focal distance of a few 102 km, the telescope having its focal plane detector on a separated spacecraft, may be re-oriented to new astrophysical targets on short timescales. Scientific applications are briefly discussed for active galactic nuclei (AGN).

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