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Single-lens mass measurement in the high-magnification microlensing event Gaia19bld located in the Galactic disc
K. A. Rybicki, Ł. Wyrzykowski, E. Bachelet +66
We present the photometric analysis of Gaia19bld, a high-magnification () microlensing event located in the southern Galactic plane, which exhibited finite source and m…
M31 Pixel Lensing PLAN Campaign: MACHO Lensing and Self Lensing Signals
S. Calchi Novati, V. Bozza, I. Bruni +14
We present the final analysis of the observational campaign carried out by the PLAN (Pixel Lensing Andromeda) collaboration to detect a dark matter signal in form of MACHOs through…
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. IV. Two bulge populations
T. Bensby, D. Adén, J. Meléndez +21
[ABRIDGED] Based on high-resolution (R~42000 to 48000) and high signal-to-noise (S/N~50 to 150) spectra obtained with UVES/VLT, we present detailed elemental abundances (O, Na, Mg,…
The Extreme Microlensing Event OGLE-2007-BLG-224: Terrestrial Parallax Observation of a Thick-Disk Brown Dwarf
A. Gould, A. Udalski, B. Monard +10
Parallax is the most fundamental technique to measure distances to astronomical objects. Although terrestrial parallax was pioneered over 2000 years ago by Hipparchus (ca. 140 BCE)…
Candidate microlensing events from M31 observations with the Loiano telescope
S. Calchi Novati, V. Bozza, F. De Paolis +9
Microlensing observations towards M31 are a powerful tool for the study of the dark matter population in the form of MACHOs both in the Galaxy and the M31 halos, a still unresolved…