The POINT-AGAPE Microlensing Survey: First Constraint on MACHOs towards M31

Abstract : To reveal the galactic dark matter in the form of MACHOs ("Massive Astrophysical Compact Halo Objects"), the POINT-AGAPE collaboration is carrying out a search for gravitational microlensing towards M31. A clear microlensing signal is detected. The high-threshold analysis of 3-year data leads to 7 bright and short microlensing candidates. The preliminary estimation of the detection efficiency implies that less than 25% (60%) of standard halos can be composed of objects with masses between 10^{-4} and 10^{-1} (10^{-1} and 1) solar mass at the 95% C.L. This result is compatible with previous microlensing results towards the Magellanic Clouds and gives the first constraints on MACHOs for a distant spiral galaxy.
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Conference papers
XXXIXth Rencontres de Moriond "Exploring the Universe", Mar 2004, La Thuile, Italy. pp.1-4


http://hal.in2p3.fr/in2p3-00022282
Contributor : Simone Lantz <>
Submitted on : Tuesday, October 12, 2004 - 4:00:17 PM
Last modification on : Tuesday, October 12, 2004 - 4:00:18 PM

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S. Paulin-Henriksson, S. Calchi-Novati. The POINT-AGAPE Microlensing Survey: First Constraint on MACHOs towards M31. XXXIXth Rencontres de Moriond "Exploring the Universe", Mar 2004, La Thuile, Italy. pp.1-4. <in2p3-00022282>

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