Aharonian, F.Akhperjanian, A.Bazer-Bachi, A.Beilicke, M.Benbow, W.Berge, D.Bernlohr, K.Boisson, C.Bolz, O.Borrel, V.Braun, I.Brion, E.Brown, A.Buhler, R.Busching, I.Boutelier, T.Carrigan, S.Chadwick, P.Chounet, L.Coignet, G.et al.2009-11-272009-11-272008Astroparticle Physics, 2008; 29(1):55-620927-65051873-2852http://hdl.handle.net/2440/54002Copyright © 2008. Astropart.Phys. Submitted to Cornell University’s online archive www.arXiv.org in 2008 by Moulin Emmanuel. Post-print sourced from www.arxiv.org.Observations of the Sagittarius dwarf spheroidal (Sgr dSph) galaxy were carried out with the H.E.S.S. array of four imaging air Cherenkov telescopes in June 2006. A total of 11 hours of high quality data are available after data selection. There is no evidence for a very high energy gamma-ray signal above the energy threshold at the target position. A 95% C.L. flux limit of 3.6 x 10-12 cm-2s-1 above 250 GeV has been derived. Constraints on the velocity-weighted cross section <sigma v> are calculated in the framework of Dark Matter particle annihilation using realistic models for the Dark Matter halo profile of Sagittarius dwarf galaxy. Two different models have been investigated encompassing a large class of halo types. A 95% C.L. exclusion limit on <sigma v> of the order of 2 x 10-25 cm3s-1 is obtained for a core profile in the 100 GeV - 1 TeV neutralino mass range.enGamma-rays: observationsDwarf spheroidal galaxyDark matterObservations of the Sagittarius dwarf galaxy by the HESS experiment and search for a dark matter signalJournal article002008445710.1016/j.astropartphys.2007.11.0070002537931000072-s2.0-3864912879140741Rowell, G. [0000-0002-9516-1581]