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NASA NTRS1997

Astrometric Observation of MACHO Gravitational Microlensing

This paper discusses the prospects for astrometric observation of MACHO gravitational microlensing events. We derive the expected astrometric observables for a simple microlensing event assuming a dark MACHO, and demonstrate that accurate astrometry can determine the lens mass, distance, and proper motion in a very general fashion.

Astrometry MACHO Microlensing↗