Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-04-18
Astronomy and Astrophysics
Astrophysics
8 pages, including 6 figures. To appear in ``Microlensing 2000: A New Era of Microlensing Astrophysics,'' an ASP conference pr
Scientific paper
The Andromeda galaxy (M31) provides a new line of sight for Galactic MACHO studies and also a signature, near-far asymmetry, which may establish the existence of MACHOs in the M31 halo. We outline the principles behind the so-called ``pixel-lensing'' experiments monitoring unresolved stars in M31. We present detailed simulations of the POINT-AGAPE survey now underway, which is using the INT wide-field camera to map the microlensing distribution over a substantial fraction of the M31 disc. We address the extent to which pixel-lensing observables, which differ from those of classical microlensing, can be used to determine the contribution and mass of M31 MACHOs. We also present some preliminary light-curves obtained from the first season (1999/2000) of INT data.
for the POINT-AGAPE Collaboration
Kerins Eamonn
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