Empirical microlensing event rates predicted by a phenomenological model

Abstract

Estimating the number of microlensing events observed in different parts of the Galactic bulge is a crucial point in planning microlensing experiments. Reliable estimates are especially important if observing resources are scarce, as is the case for space missions: K2, WFIRST, and Euclid. Here we show that the number of detected events can be reliably estimated based on statistics of stars observed in targeted fields. The statistics can be estimated relatively easily, which makes presented method suitable for planning future microlensing experiments.

Submitted; online table attached as ancillary file

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• Microlensing Searches for Exoplanets
• UKIRT microlensing surveys as a pathfinder for $WFIRST$: The detection of five highly extinguished low-$|b|$ events
• Extracting Microlensing Signals from K2 Campaign 9
• Masses for Free-Floating Planets and Dwarf Planets
• VVV Survey Microlensing: the Galactic Longitude Dependence
• Measurement of Source Star Colors with the K2C9-CFHT Multi-color Microlensing Survey
• VVV Survey Microlensing: the Galactic Latitude Dependence
• Predictions for the Detection and Characterization of a Population of Free-Floating Planets with K2 Campaign 9
• Astrophysics with New Horizons: Making the Most of a Generational Opportunity
• KMT-2018-BLG-1292: A Super-Jovian Microlens Planet in the Galactic Plane
• Photometry of K2 Campaign 9 bulge data
• VVV survey microlensing: candidate events with source in the far disk