Generalized Microlensing Effective Timescale

Andrew Gould

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arXiv · 1312.6692

Generalized Microlensing Effective Timescale

Andrew Gould

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Abstract

The microlensing effective timescale t_eff=beta*t_E is used frequently in high-magnification (beta << 1) microlensing events, because it is better constrained than either the impact parameter beta or the Einstein timescale t_E separately. It also facilitates intuitive understanding of lightcurves prior to determination of a model. Similar considerations may apply to very low magnification events. I therefore provide a generalization of this quantity to all events: t_eff = beta*t_E*sqrt((1+beta^2/2)(1+beta^2/4)).

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Andrew Gould. 2013-12-26. Generalized Microlensing Effective Timescale. https://arxiv.org/abs/1312.6692

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