Detecting supersymmetric dark matter in M31 with CELESTE ?
  It is widely believed that dark matter exists within galaxies and clusters of galaxies. Under the assumption that this dark matter is composed of the lightest, stable supersymmetric particle, assumed to be the neutralino, the feasibility of its indirect detection via observations of a diffuse gamma-ray signal due to neutralino annihilation within M31 is examined. 
E. Nuss, G. Moultaka, A. Falvard, E. Giraud, A. Jacholkowska, K.   Jedamzik, J. Lavalle, F. Piron, M. Sapinski, P. Salati, R...