EROS

EROS (for Expérience pour la Recherche d'Objets Sombres, i.e., Experience in Searching for Dark Objects) was a survey to identify MACHOs, i.e., dark matter in the form of brown dwarfs or field planets, by searching for gravitational microlensing events while watching stars in the Magellanic Clouds. EROS-1 observations were carried out in 1990-1995 and EROS-2 in 1996-2003, by the European Southern Observatory (ESO) at the La Silla Observatory (LSO) site. Some variable stars and supernovae were observed. Similar projects have been the MACHO Project and OGLE.