Micro-arc-second angular resolution using Gamma-ray Fresnel Lenses

Details Micro-arc-second angular resolution using Gamma-ray Fresnel Lenses Micro-arc-second angular resolution using Gamma-ray Fresnel Lenses

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002sf2a.conf..229s&link_type=abstract

SF2A-2002: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 24-29, 2002, Eds.: F. Combes and D. Barret,

Physics

Optics

Scientific paper

At gamma-ray energies diffraction-limited optics of the order of a few metres in diameter can yield sub-micro-arc-second angular resolution. Furthermore, we now understand how diffraction limited gamma-ray Fresnel lenses of this size can be made. The focal lengths are of the order of one million kilometres, but techniques for formation-flying of satellites seem to be capable of maintaining two spacecraft at the required separation. Many problems remain to be resolved, but perhaps the new science of high angular resolution gamma-ray astronomy is within sight.

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