Real-time Detection of Gravitational Microlensing

Details Real-time Detection of Gravitational Microlensing Real-time Detection of Gravitational Microlensing

1995-08-09

arxiv.org/abs/astro-ph/9508039v1

Astrophys.J. 463 (1996) L67

Astronomy and Astrophysics

Astrophysics

6 pages, uuencoded compressed postscript, to appear int the Proceedings of the IAU Symposium 173: ``Astrophysical Applications

Scientific paper

Real-time detection of microlensing has moved from proof of concept in 1994 to a steady stream of events this year. Global dissemination of these events by the MACHO and OGLE collaborations has made possible intensive photometric and spectroscopic followup from widely dispersed sites confirming the microlensing hypothesis. Improved photometry and increased temporal resolution from followup observations greatly increases the possibility of detecting deviations from the standard point-source, point-lens, inertial motion microlensing model. These deviations are crucial in understanding individual lensing systems by breaking the degeneracy between lens mass, position and velocity. We report here on GMAN (Global Microlensing Alert Network), the coordinated followup of MACHO alerts.

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