Triggers:Microlensing
From Gaia Science Alerts Working Group
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Amplitude: can be many magnitudes, in range 0.1-10 mag. Time-scale: is defined as Einstein Ring crossing time and is close to FWHM of the bell-like light curve of the event. Sources: can be located anywhere, however, the further source, the higher chance of it being microlensed.
OGLE Early Warning System (EWS) is detecting in real-time about 600 events per year towards the Galactic bulge.
