paper

Cheap Space-Based Microlens Parallaxes for High-Magnification Events

arXiv:1205.5801 · doi:10.1088/2041-8205/755/1/L17

Abstract

We show that for high-magnification (Amax > 100) microlensing events, accurate microlens parallaxes can be obtained from three or fewer photometric measurements from a small telescope on a satellite in solar orbit at ~1 AU from Earth. This is 1--2 orders of magnitude less observing resources than are required for standard space-based parallaxes. Such microlens parallax measurements would yield accurate mass and distance measurements to the lens for all cases in which finite-source effects were observed from the ground over peak. This would include virtually all high-magnification events with detected planets and a substantial fraction of those without. Hence it would permit accurate estimates of the Galactic distribution of planets.

6 pages, 1 figure, submitted to ApJ Letters

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