Volume 469, Number 1, July I 2007
|Page(s)||115 - 119|
|Published online||24 April 2007|
Probing MACHOs by observation of M 31 pixel lensing with the 1.5 m Loiano telescope
Dipartimento di Fisica “E. R. Caianiello”, Università di Salerno, via S. Allende, 84081 Baronissi (SA), Italy e-mail: firstname.lastname@example.org
2 Istituto Nazionale di Fisica Nucleare, sezione di Napoli, Italy
3 INAF – Osservatorio Astronomico di Capodimonte, via Moiariello 16, Napoli, Italy
4 Dipartimento di Fisica, Università di Lecce and INFN, Sezione di Lecce, CP 193, 73100 Lecce, Italy
5 SUPA, University of St Andrews, School of Physics & Astronomy, North Haugh, St Andrews, KY16 9SS, UK
6 APC, 10, rue Alice Domon et Léonie Duquet 75205 Paris, France
7 Institute for Theoretical Physics, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
8 Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, US
Accepted: 29 March 2007
We analyse a series of pilot observations in order to study microlensing of (unresolved) stars in M 31 with the 1.5 m 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 M 31.
Key words: gravitational lensing / Galaxy: Halo / galaxies: individual: M 31
© ESO, 2007
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