Multiband imaging with Fresnel x-ray telescopes

Christoph Braig; Peter Predehl

doi:10.1117/12.856454

29 July 2010 Multiband imaging with Fresnel x-ray telescopes

Christoph Braig, Peter Predehl

Proceedings Volume 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray; 77322M (2010) https://doi.org/10.1117/12.856454
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

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).

Citation Download Citation

Christoph Braig and Peter Predehl "Multiband imaging with Fresnel x-ray telescopes", Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 77322M (29 July 2010); https://doi.org/10.1117/12.856454

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