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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

  • Authors: C. Alcock, R. A. Allsman, D. Alves, T. S. Axelrod, A. C. Becker, D. P. Bennett, K. H. Cook, K. C. Freeman, K. Griest, J. Guern, M. J. Lehner, S. L. Marshall, B. A. Peterson, M. R. Pratt, P. J. Quinn, A. W. Rodgers, C. W. Stubbs, W. Sutherland, D. L. Welch, and The MACHO Collaboration

Alcock et al. 1997 The Astrophysical Journal 486 697.

  • Provider: AAS Journals

Caption: Fig. 2.

Final cuts for selection of microlensing candidates. The x‐axis is ﹩\Delta \chi ^{2}/( \chi ^{2}_{\mathrm{ml}\,}/N_{\mathrm{dof}\,}) ﹩, where ﹩\Delta \chi ^{2}\equiv \chi ^{2}_{\mathrm{const}\,}-\chi ^{2}_{\mathrm{ml}\,}﹩ is the improvement in χ2 between a constant brightness fit and a microlensing fit. The y‐axis is the fitted maximum magnification. The symbols are explained in § 3.1. The solid lines show the final cuts (10) and (11); the circles in the upper right are the 12 events (ten stars) discussed in § 3.2. Events 2 and 3 from A96 are also indicated.

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