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Gravitational microlensing events due to stellar-mass black holes

Bennett, D P; Becker, Andrew C; Quinn, J M W; Tomaney, A B; Alcock, Charles; Allsman, Robyn; Alves, David R; Axelrod, Tim; Calitz, J.; Cook, Kem H; Drake, Andrew J; Fragile, P C; Freeman, Kenneth; Geha, M; Griest, K; Johnson, B Ronald; Keller, S C; Laws, C; Lehner, M J; Marshall, S L; Minniti, Dante; Nelson, C A; Peterson, Bruce; Popowski, P; Pratt, M; Quinn, Peter J; Rhie, S.; Stubbs, Christopher W; Sutherland, William J; Vandehei, T; Welch, D L


We present an analysis of the longest timescale microlensing events discovered by the MACHO Collaboration during a 7 year survey of the Galactic bulge. We find six events that exhibit very strong microlensing parallax signals due, in part, to accurate photometric data from the GMAN and MPS collaborations. The microlensing parallax fit parameters are used in a likelihood analysis, which is able to estimate the distances and masses of the lens objects based on a standard model of the Galactic...[Show more]

CollectionsANU Research Publications
Date published: 2002
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1086/342225


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