This simulator is based on snapshot 1307 of the Besançon Model, a population synthesis model of the Galaxy that has been developed by Annie Robin and collaborators and is under continual development.
You can use the forms page to create microlensing maps of the inner Galaxy. You can select optical depth, rate per source, rate per sky area or average event duration maps for different choices of peak event S/N threshold and filter bandpass. Ranges can be specified for sky area, survey apparent magnitude, event duration and lens-source relative proper motion.
Each map is accompanied by an estimated error map. The percentage error may be large in the case of very restricted ranges, or regions of low microlensing probability. For sky regions where there is insufficient simulation data to provide a reliable interpolation the error map will be masked in blue. Microlensing quantites in these regions should not be trusted.
The output page also includes a link to the map data for use in your own mapping software.
The calculations used to make these maps are detailed in
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