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- W2073692511 abstract "ABSTRACT We present a dir active-refractive X-ray telescope for simultaneous imaging in multiple energy bands. Based onsegmented dispersion corrected hybrid lenses, the system yields an angular resolution around 1 mas for photonenergiesbetween 5 and10 keV. The total sensitivity, meas ured in terms of eectiv e area times spectral bandwidth,reaches several 10 3 cm 2 keV. The suggested arrangemen t exploits Fresnel lenses used in higher diraction ordersfor orderly protection from scattered radiation as well as reduced refractive proles for an enhanced throughput.With a focal distance of a few 10 2 km, the telescope having its focal pla ne detector on a sep arated spacecraft,may be re-oriented to new astrophysical targets on short timescales. Scienti c applications are briey discussedfor active galactic nuclei (AGN).Keywords: Fresnel lenses, X-ray telescopes, diracti on-limited optics, high resolution imaging 1. INTRODUCTION Zone plates, phase Fresnel lenses and their derivatives have been proposed for next generation X-ray telescopesand Gamma-ray observatories." @default.
- W2073692511 created "2016-06-24" @default.
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- W2073692511 date "2010-07-16" @default.
- W2073692511 modified "2023-09-23" @default.
- W2073692511 title "Multiband imaging with Fresnel x-ray telescopes" @default.
- W2073692511 doi "https://doi.org/10.1117/12.856454" @default.
- W2073692511 hasPublicationYear "2010" @default.
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