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The MACHO Project: Microlensing Results from 5.7 Years of Large Magellanic Cloud Observations
We report on our search for microlensing toward the Large Magellanic Cloud (LMC). Analysis of 5.7 yr of photometry on 11.9 million stars in the LMC reveals 13-17 microlensing events. A detailed…
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Supersymmetric Dark Matter
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The MACHO Project Large Magellanic Cloud Microlensing Results from the First Two Years and the Nature of the Galactic Dark Halo
The MACHO Project is a search for dark matter in the form of massive compact halo objects (MACHOs). Photometric monitoring of millions of stars in the Large Magellanic Cloud (LMC), Small Magellanic…
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The Macho Project: 45 Candidate Microlensing Events from the First Year Galactic Bulge Data
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 for 190 days in 1993.…
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The MACHO Project: Microlensing Optical Depth toward the Galactic Bulge from Difference Image Analysis
We present the microlensing optical depth toward the Galactic bulge based on the detection of 99 events found in our Difference Image Analysis (DIA) survey. This analysis encompasses 3 yr of data,…
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The MACHO Project Large Magellanic Cloud Variable Star Inventory. XI. Frequency Analysis of the Fundamental-Mode RR Lyrae Stars
We have frequency-analyzed 6391 variables classified earlier as fundamental-mode RR Lyrae (RR0) stars in the MACHO database on the Large Magellanic Cloud (LMC). The overwhelming majority (i.e., 96%)…
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Geometry of the Large Magellanic Cloud Disk: Results from MACHO and the Two Micron All Sky Survey
We present a detailed study of the viewing angles and geometry of the inner LMC (ρ ≲ 4°) based on a sample of more than 2000 MACHO Cepheids with complete {VR}KC light curves and single-phase Two…
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Possible gravitational microlensing of a star in the Large Magellanic Cloud
THERE is now abundant evidence for the presence of large quantities of unseen matter surrounding normal galaxies, including our own1,2. The nature of this ’dark matter‘ is unknown, except that it…
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The Use of High-Magnification Microlensing Events in Discovering Extrasolar Planets
Hundreds of gravitational microlensing events have now been detected toward the Galactic bulge, with many more to come. The detection of fine structure in these events has been theorized as an…
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Binary Microlensing Events from the MACHO Project
We present the light curves of 21 gravitational microlensing events from the first six years of the MACHO Project gravitational microlensing survey that are likely examples of lensing by binary…
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