Probing MACHOs by observation of M 31 pixel lensing with the 1.5 m Loiano telescope

2007/04/11 by S. Calchi Novati, G. Covone, F. De Paolis +10
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1051/0004-6361:20077075

published as Astron.Astrophys.469:115-119,2007 · Accepted for publication as a research Note in Astronomy & Astrophysics

arxiv created 2007/04/11 · openalex publication_date 2007/04/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

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.

Citations

• First microlensing candidate towards M31 from the Nainital Microlensing Survey
• The Wendelstein Calar Alto Pixellensing Project (WeCAPP): First MACHO Candidates
• The POINT-AGAPE survey: 4 high signal-to-noise microlensing candidates detected towards M 31
• First microlensing candidates from the MEGA survey of M 31