MACHO Alert 95‐30: First Real‐Time Observation of Extended Source Effects in Gravitational Microlensing
The Astrophysical Journal1997Vol. 491(2), pp. 436–450
Citations Over TimeTop 1% of 1997 papers
C. Alcock, William H. Allen, R. A. Allsman, D. R. Alves, T. S. Axelrod, Timothy Banks, S. F. Beaulieu, A. C. Becker, R. H. Becker, D. P. Bennett, I. A. Bond, B. S. Carter, K. H. Cook, R. J. Dodd, K. C. Freeman, Michael D. Gregg, K. Griest, J. B. Hearnshaw, Alexis Heller, Mitsuhiko Honda, J. Jugaku, S. Kabe, S. Kaspi, P. M. Kilmartin, Atsuko Kitamura, O. Kovo, M. J. Lehner, Tom Love, Dan Maoz, S. L. Marshall, Y. Matsubara, D. Minniti, M. Miyamoto, Jon A. Morse, Y. Muraki, T. Nakamura, B. A. Peterson, M. M. Phillips, M. R. Pratt, P. J. Quinn, I. Neill Reid, M. Reid, David J. Reiss, A. Retter, A. W. Rodgers, W. L. W. Sargent, H. Sato, M. Sekiguchi, P. B. Stetson, C. W. Stubbs, D. J. Sullivan, William J. Sutherland, A. Tomaney, T. Vandehei, Y. Watase, D. L. Welch, Tatsuya Yanagisawa, M. Yoshizawa, P. C. M. Yock
Abstract
We present analysis of MACHO Alert 95-30, a dramatic gravitational microlensing event toward the Galactic bulge whose peak magnication departs signicantly from the standard point-source microlensing model. Alert 95-30 was observed in real time by the Global Microlensing Alert Network (GMAN), which obtained densely sampled photometric and spectroscopic data throughout the event. We interpret the light-curve "" ne structure as indicating transit of the lens across the extended face of the source star. This signies resolution of a star several kiloparsecs distant.
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