Galactic Bulge Microlensing Events with Clump Giants as Sources

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dc.creatorPopowski, P.
dc.creatorAlcock, C.
dc.creatorAllsman, R. A.
dc.creatorAlves, D. R.
dc.creatorAxelrod, T. S.
dc.creatorBecker, A. C.
dc.creatorBennett, D. P.
dc.creatorCook, K. H.
dc.creatorDrake, A. J.
dc.creatorFreeman, K. C.
dc.creatorGeha, M.
dc.creatorGriest, K.
dc.creatorLehner, M. J.
dc.creatorMarshall, S. L.
dc.creatorMinniti, D.
dc.creatorNelson, C. A.
dc.creatorPeterson, B. A.
dc.creatorPratt, M. R.
dc.creatorQuinn, P. J.
dc.creatorStubbs, C. W.
dc.creatorSutherland, W.
dc.creatorTomaney, A. B.
dc.creatorVandehei, T.
dc.creatorWelch, D.
dc.date2000-05-23
dc.date.accessioned2026-07-07T01:53:43Z
dc.date.available2026-07-07T01:53:43Z
dc.descriptionWe present preliminary results of the analysis of 5 years of MACHO data on the Galactic bulge microlensing events with clump giants as sources. In particular, we discuss: 1) the selection of `giant' events, 2) distribution of impact parameters, 3) distribution of event durations, 4) the concentration of long duration events in MACHO field 104 centered on (l,b) = (3.1,-3.0). We report the preliminary average optical depth of (2.0 +/- 0.4) x 10^{-6} (internal) at (l,b) = (3.9,-3.8). We discuss future work and prospects for building a coherent model of the Galaxy.
dc.description8 pages, 4 figures. To appear in ``Microlensing 2000: A New Era of Microlensing Astrophysics,'' an ASP conference proceedings, eds. J.W. Menzies and P.D. Sackett
dc.identifierhttps://arxiv.org/abs/astro-ph/0005466
dc.identifierhttp://arxiv.org/abs/astro-ph/0005466
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/1064
dc.subjectAstrophysics
dc.titleGalactic Bulge Microlensing Events with Clump Giants as Sources
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