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