Abdollahi S.Baldini L.Bellazzini R.Berenji B.Bissaldi E.Bonino R.Bruel P.Buson S.Charles E.Chen A.W.Ciprini S.Crnogorcevic M.Cuoco A.D’Ammando F.de Angelis A.Di Mauro M.Di Lalla N.Di Venere L.Domínguez A.Fegan S.J.Fiori A.Fusco P.Gammaldi V.Gargano F.Gasparrini D.Giacchino F.Giglietto N.Giliberti M.Giordano F.Giroletti M.Grenier I.A.Guiriec S.Gustafsson M.Hays E.Hewitt J.W.Horan D.Katagiri H.Kuss M.Li J.Longo F.Loparco F.Lorusso L.Martí-Devesa G.Mazziotta M.N.McEnery J.E.Mereu I.Meyer M.Michelson P.F.Mirabal N.Mitthumsiri W.Mizuno T.Morselli A.Moskalenko I.V.Negro M.Omodei N.Orienti M.Orlando E.Panzarini G.Persic M.Pesce-Rollins M.Pillera R.Porter T.A.Principe G.Rainò S.Rando R.Razzano M.Reimer O.Sánchez-Conde M.Saz Parkinson P.M.Serini D.Suson D.J.Torres D.F.Zaharijas G.Albert A.Alfaro R.Alvarez C.Arteaga-Velázquez J.C.Avila Rojas D.Ayala Solares H.A.Babu R.Belmont-Moreno E.Caballero-Mora K.S.Capistrán T.Carramiñana A.Casanova S.Chaparro-Amaro O.Cotti U.Cotzomi J.Coutiño de León S.de la Fuente E.Diaz Hernandez R.Dingus B.L.DuVernois M.A.Durocher M.Díaz-Vélez J.C.Engel K.Espinoza C.Fan K.L.Fraija N.García-González J.A.Mahidol University2026-04-292026-04-292026-03-01Journal of Cosmology and Astroparticle Physics Vol.2026 No.3 (2026)https://repository.li.mahidol.ac.th/handle/123456789/116411Dwarf spheroidal galaxies (dSphs) are excellent targets for indirect dark matter (DM) searches using gamma-ray telescopes because they are thought to have high DM content and a low astrophysical background. The sensitivity of these searches is improved by combining the observations of dSphs made by different gamma-ray telescopes. We present the results of a combined search by the most sensitive currently operating gamma-ray telescopes, namely: the satellite-borne Fermi-LAT telescope; the ground-based imaging atmospheric Cherenkov telescope arrays H.E.S.S., MAGIC, and VERITAS; and the HAWC water Cherenkov detector. Individual datasets were analyzed using a common statistical approach. Results were subsequently combined via a global joint likelihood analysis. We obtain constraints on the velocity-weighted cross section 〈σv〉 for DM self-annihilation as a function of the DM particle mass. This five-instrument combination allows the derivation of up to 2-3 times more constraining upper limits on 〈σv〉 than the individual results over a wide mass range spanning from 5 GeV to 100 TeV. Depending on the DM content modeling, the 95% confidence level observed limits reach 1.5×10⁻²⁴ cm³s⁻¹ and 3.2×10⁻²⁵ cm³s⁻¹, respectively, in the τ⁺τ⁻ annihilation channel for a DM mass of 2 TeV.Physics and AstronomyArticleSCOPUS10.1088/1475-7516/2026/03/0352-s2.0-10503588939314757516