Speaker
Dr
Sean Terry
(University of Maryland)
Description
I will present an analysis of the microlensing event OGLE-2023-BLG-0524, the location of which was serendipitously captured in 1997 with the Hubble Space Telescope (HST). Our team conducted recent follow-up imaging with HST in 2025, thus we achieve a record-breaking baseline length of 28 years between the high-resolution epochs. The very short duration of this microlensing event (tE = 0.346 ± 0.008 days) indicates an FFP as the explanation. We have not detected any potential host star to the lens with the HST data, which further supports the true FFP scenario. Finally, our estimate of the angular Einstein radius value θE = 4.78±0.23 µas, suggests a super-Earth in the Galactic disk or a sub-Saturn-mass planet in the Galactic bulge.
Primary author
Dr
Sean Terry
(University of Maryland)
