The MACHO Project: Parallax and Binary Source Microlensing Events

Details The MACHO Project: Parallax and Binary Source Microlensing Events The MACHO Project: Parallax and Binary Source Microlensing Events

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.8303b&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #83.03; Bulletin of the American Astronomical Society, Vol. 29, p.1346

Astronomy and Astrophysics

Astronomy

6

Scientific paper

We present the results from parallax and binary source fits for more than 200 gravitational microlensing events observed by the MACHO Collaboration toward the Galactic Bulge and the Magellanic Clouds. For a fraction of these events, we have a significant detection of a lightcurve deviation due to the orbital motion of the Earth (parallax) or a binary source. In these cases, an estimate of the distance and mass of the lens is obtained. When these effects are not detected, we obtain limits on the distance and mass of the lens. The implications of these results for the interpretation of the excess lensing seen towards both the LMC and and Galactic bulge are also discussed. This paper is dedicated to Alex Rodgers who made the MACHO Project possible.

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