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The MACHO Project: 45 Candidate Microlensing Events from the First Year Galactic Bulge Data
C. Alcock, R. A. Allsman, T. S. Axelrod +15
We report the detection of 45 candidate microlensing events in fields toward the Galactic bulge. These come from the analysis of 24 fields containing 12.6 million stars observed fo…
Real-time Detection of Gravitational Microlensing
M. R. Pratt, C. Alcock, R. A. Allsman +17
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 colla…
First Observation of Parallax in a Gravitational Microlensing Event
C. Alcock, R. A. Allsman, D. Alves +14
We present the first detection of parallax effects in a gravitational microlensing event. Parallax in a gravitational microlensing event observed only from the Earth appears as a d…
Ground-based Discovery of Cepheids and Miras in M101
David R. Alves, Kem H. Cook
We have identified 4 Cepheids and 5 Miras using KPNO 4m BVRI images of an outer field in M101. The Cepheid and Mira periods range from 30 to 60 days and 350 to 800 days, respective…