Limits to Dark Matter Annihilation Cross-Section from a Combined Analysis of MAGIC and Fermi-LAT Observations of Dwarf Satellite Galaxies

M.L. Ahnen , S. Ansoldi , L.A. Antonelli , P. Antoranz , A. Babic , B. Banerjee , P. Bangale , U. Barres de Almeida , J.A. Barrio , J. Becerra Gonzalez , W. Bednarek , E. Bernardini , B. Biasuzzi , A. Biland , O. Blanch , S. Bonnefoy , G. Bonnoli , F. Borracci , T. Bretz , E. Carmona , A. Carosi , A. Chatterjee , R. Clavero , P. Colin , E. Colombo , J.L. Contreras , J. Cortina , S. Covino , P. da Vela , F. Dazzi , A. de Angelis , B. de Lotto , E. de Ona Wilhelmi , C. Delgado Mendez , F. Di Pierro , D. Dominis Prester , D. Dorner , M. Doro , S. Einecke , D.Eisenacher Glawion , D. Elsaesser , A. Fernandez-Barral , D. Fidalgo , M.V. Fonseca , L. Font , K. Frantzen , C. Fruck , D. Galindo , R.J. Garcia Lopez , M. Garczarczyk , D.Garrido Terrats , M. Gaug , P. Giammaria , N. Godinovic , A. Gonzalez Munoz , D. Guberman , A. Hahn , Y. Hanabata , M. Hayashida , J. Herrera , J. Hose , D. Hrupec , G. Hughes , W. Idec , K. Kodani , Y. Konno , H. Kubo , J. Kushida , A. La Barbera , D. Lelas , E. Lindfors , S. Lombardi , F. Longo , M. Lopez , R. Lopez-Coto , A. Lopez-Oramas (1) , E. Lorenz , P. Majumdar , M. Makariev , K. Mallot , G. Maneva , M. Manganaro , K. Mannheim , L. Maraschi , B. Marcote , M. Mariotti , M. Martinez , D. Mazin , U. Menzel , J.M. Miranda , R. Mirzoyan , A. Moralejo , E. Moretti , D. Nakajima , V. Neustroev , A. Niedzwiecki , M.Nievas Rosillo , K. Nilsson , K. Nishijima , K. Noda , R. Orito , A. Overkemping , S. Paiano , J. Palacio , M. Palatiello , D. Paneque , R. Paoletti , J.M. Paredes , X. Paredes-Fortuny , M. Persic , J. Poutanen , P.G. Prada Moroni , E. Prandini , I. Puljak , W. Rhode , M. Ribo , J. Rico , J. Rodriguez Garcia , T. Saito , K. Satalecka , C. Schultz , T. Schweizer , S.N. Shore , A. Sillanpaa , J. Sitarek , I. Snidaric , D. Sobczynska , A. Stamerra , T. Steinbring , M. Strzys , L. Takalo , H. Takami , F. Tavecchio , P. Temnikov , T. Terzic , D. Tescaro , M. Teshima , J. Thaele , D.F. Torres , T. Toyama , A. Treves , V. Verguilov , I. Vovk , J.E. Ward , M. Will , M.H. Wu , R. Zanin , J. Aleksic , M. Wood , B. Anderson , E.D. Bloom , Johann Cohen-Tanugi (2) , A. Drlica-Wagner , M.N. Mazziotta , M. Sanchez-Conde , L. Strigari

1 DPhP - Département de Physique des Particules (ex SPP)
2 LUPM - Laboratoire Univers et Particules de Montpellier

We present the first joint analysis of gamma-ray data from the MAGIC Cherenkov telescopes and the Fermi Large Area Telescope (LAT) to search for gamma-ray signals from dark matter annihilation in dwarf satellite galaxies. We combine 158 hours of Segue 1 observations with MAGIC with 6-year observations of 15 dwarf satellite galaxies by the Fermi-LAT. We obtain limits on the annihilation cross-section for dark matter particle masses between 10 GeV and 100 TeV—the widest mass range ever explored by a single gamma-ray analysis. These limits improve on previously published Fermi-LAT and MAGIC results by up to a factor of two at certain masses. Our new inclusive analysis approach is completely generic and can be used to perform a global, sensitivity-optimized dark matter search by combining data from present and future gamma-ray and neutrino detectors.

Mots clés: dark matter experiments; gamma ray experiments; dwarfs galaxies; neutrino experiments; dark matter: annihilation; cross section: annihilation; neutrino: detector; gamma ray: VHE; MAGIC; satellite; galaxy; GLAST; upper limit; muon; tau; W; white dwarf; Cherenkov counter; S030DMA; S046PHB

Domaines: Astrophysique [astro-ph]

M.L. Ahnen, S. Ansoldi, L.A. Antonelli, P. Antoranz, A. Babic, et al.. Limits to Dark Matter Annihilation Cross-Section from a Combined Analysis of MAGIC and Fermi-LAT Observations of Dwarf Satellite Galaxies. JCAP, 2016, 02, pp.039. ⟨10.1088/1475-7516/2016/02/039⟩. ⟨hal-02017079⟩