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Astronomy and Astrophysics 469 (2007) 115-119
Probing MACHOs by observation of M31 pixel lensing with the 1.5m Loiano telescope
S. Calchi Novati, G. Covone, F. De Paolis, M. Dominik, Y. Giraud-Héraud1, G. Ingrosso, Ph. Jetzer, L. Mancini, A. Nucita, G. Scarpetta, F. Strafella, A. Gould

We analyse a series of pilot observations in order to study microlensing of (unresolved) stars in M31 with the 1.5m Loiano telescope, including observations on both identified variable source stars and reported microlensing events. We also look for previously unknown variability and discover a nova. We discuss an observing strategy for an extended campaign with the goal of determining whether MACHOs exist or whether all microlensing events are compatible with lens stars in M31.
1 :  APC - UMR 7164 - AstroParticule et Cosmologie
APC - Cosmologie et Gravitation
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique
Gravitational lensing – Galaxy: Halo – Galaxies: M31
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