Probing MACHOs by observation of M 31 pixel lensing with the 1.5 m Loiano telescope - (Research Note)

S. Calchi Novati, G. Covone, F. De Paolis, M. Dominik, Y. Giraud-Heraud, G. Ingrosso, Ph. Jetzer, L. Mancini, A. Nucita, G. Scarpetta, F. Strafella, A. Gould

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)115-119
Number of pages5
JournalAstronomy & Astrophysics
Volume469
DOIs
Publication statusPublished - Jul 2007

Keywords

  • gravitational lensing
  • Galaxy : Halo
  • galaxies : individual : M 31
  • LARGE-MAGELLANIC-CLOUD
  • MASSIVE VARIABILITY SURVEYS
  • LIGHT-CURVE CLASSIFICATION
  • AGAPE MICROLENSING SURVEY
  • UNRESOLVED STARS
  • ANDROMEDA GALAXY
  • NOVA POPULATION
  • CLASSICAL NOVAE
  • M31
  • CANDIDATES

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