The repeating microlensing event OGLE-2003-BLG-095: A plausible case for microlensing of a binary source

Details The repeating microlensing event OGLE-2003-BLG-095: A plausible case for microlensing of a binary source The repeating microlensing event OGLE-2003-BLG-095: A plausible case for microlensing of a binary source

2004-02-16

arxiv.org/abs/astro-ph/0402385v1

Astronomy and Astrophysics

Astrophysics

16 pages, 4 figures (2 in color), 2 tables, uses aastex.cls

Scientific paper

The apparently repeating microlensing event OGLE-2003-BLG-095 is analyzed. Data were obtained from the OGLE Internet archive and exist in the public domain. The source is relatively bright, with an unmagnified (but possibly blended) $I$-band magnitude of 15.58, and the signal-to-noise ratio of the data is excellent. The light curve shows two distinct, smooth peaks characteristic of a double microlensing event. It can be modeled as either (1) microlensing by a binary lens or (2) microlensing of a binary source, with the latter model providing a statistically superior fit. However due to apparent low-amplitude variability of the source, the interpretation is somewhat ambiguous. OGLE-2003-BLG-095 is only the second possible case in the literature for microlensing of a well-resolved binary source.

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