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Lens Mass Estimate in the Galactic Disk Extreme Parallax Microlensing Event Gaia19dke

Reichart, D. E.; Poleski, R.; Gromadzki, M. +78 more

We present the results of our analysis of Gaia19dke, an extraordinary microlensing event in the Cygnus constellation that the Gaia satellite discovered. This event featured a strong microlensing parallax effect, resulting in multiple light curve peaks. We conducted extensive photometric, spectroscopic, and high-resolution imaging follow-up observa…