The MACHO Project: Microlensing Optical Depth Toward the Galactic Bulge from Difference Image Analysis

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Alcock, Charles
Allsman, Robyn
Alves, David R
Axelrod, Tim
Becker, Andrew C
Bennett, D P
Cook, Kem H
Drake, Andrew John
Freeman, Kenneth
Geha, M

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IOP Publishing

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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, covering ̃17 million stars in ̃4 deg2, to a source-star

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Astrophysical Journal, The

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