The supernova remnant W49B as seen with H.E.S.S. and Fermi-LAT

H. E. S. S. CollaborationAbdalla, H.H.AbdallaAbramowski, A.A.AbramowskiAharonian, F.F.AharonianAit Benkhali, F.F.Ait BenkhaliAkhperjanian, A. G.A. G.AkhperjanianAndersson, T.T.AnderssonAngüner, E. O.E. O.AngünerArrieta, M.M.ArrietaAubert, P.P.AubertBackes, M.M.BackesBalzer, A.A.BalzerBarnard, M.M.BarnardBecherini, Y.Y.BecheriniBecker Tjus, J.J.Becker TjusBerge, D.D.BergeBernhard, S.S.BernhardBernlöhr, K.K.BernlöhrBlackwell, R.R.BlackwellBöttcher, M.M.BöttcherBoisson, C.C.BoissonBolmont, J.J.BolmontBordas, P.P.BordasBregeon, J.J.BregeonBrun, F.F.BrunBrun, P.P.BrunBryan, M.M.BryanBulik, T.T.BulikCapasso, M.M.CapassoCarr, J.J.CarrCasanova, S.S.CasanovaCerruti, M.M.CerrutiChakraborty, N.N.ChakrabortyChalme-Calvet, R.R.Chalme-CalvetChaves, R. C. G.R. C. G.ChavesChen, A.A.ChenChevalier, J.J.ChevalierChrétien, M.M.ChrétienColafrancesco, S.S.ColafrancescoCologna, G.G.ColognaCondon, B.B.CondonConrad, J.J.ConradCui, Y.Y.CuiDavids, I. D.I. D.DavidsDecock, J.J.DecockDegrange, B.B.DegrangeDeil, C.C.DeilDevin, J.J.DevindeWilt, P.P.deWiltDirson, L.L.DirsonDjannati-Ataï, A.A.Djannati-AtaïDomainko, W.W.DomainkoDonath, A.A.DonathDrury, L. O. 'C.L. O. 'C.DruryDubus, G.G.DubusDutson, K.K.DutsonDyks, J.J.DyksEdwards, T.T.EdwardsEgberts, K.K.EgbertsEger, P.P.EgerErnenwein, J. -P.J. -P.ErnenweinEschbach, S.S.EschbachFarnier, C.C.FarnierFegan, S.S.FeganFernandes, M. V.M. V.FernandesFiasson, A.A.FiassonFontaine, G.G.FontaineFörster, A.A.FörsterFunk, S.S.FunkFüßling, M.M.FüßlingGabici, S.S.GabiciGajdus, M.M.GajdusGallant, Y. A.Y. A.GallantGarrigoux, T.T.GarrigouxGiavitto, G.G.GiavittoGiebels, B.B.GiebelsGlicenstein, J. F.J. F.GlicensteinGottschall, D.D.GottschallGoyal, A.A.GoyalGrondin, M. -H.M. -H.GrondinHadasch, D.D.HadaschHahn, J.J.HahnHaupt, M.M.HauptHawkes, J.J.HawkesHeinzelmann, G.G.HeinzelmannHenri, G.G.HenriHermann, G.G.HermannHervet, O.O.HervetHinton, J. A.J. A.HintonHofmann, W.W.HofmannHoischen, C.C.HoischenHoller, M.M.HollerHorns, D.D.HornsIvascenko, A.A.IvascenkoJacholkowska, A.A.JacholkowskaJamrozy, M.M.JamrozyJaniak, M.M.JaniakJankowsky, D.D.JankowskyJankowsky, F.F.JankowskyJingo, M.M.JingoJogler, T.T.JoglerJouvin, L.L.JouvinJung-Richardt, I.I.Jung-RichardtKastendieck, M. A.M. A.KastendieckKatarzyński, K.K.KatarzyńskiKatz, U.U.KatzKerszberg, D.D.KerszbergKhélifi, B.B.KhélifiKieffer, M.M.KiefferKing, J.J.KingKlepser, S.S.KlepserKlochkov, D.D.KlochkovKluźniak, W.W.KluźniakKolitzus, D.D.KolitzusKomin, Nu.Nu.KominKosack, K.K.KosackKrakau, S.S.KrakauKraus, M.M.KrausKrayzel, F.F.KrayzelKrüger, P. P.P. P.KrügerLaffon, H.H.LaffonLamanna, G.G.LamannaLau, J.J.LauLees, J. -P.J. -P.LeesLefaucheur, J.J.LefaucheurLefranc, V.V.LefrancLemière, A.A.LemièreLemoine-Goumard, M.M.Lemoine-GoumardLenain, J. -P.J. -P.LenainLeser, E.E.LeserLohse, T.T.LohseLorentz, M.M.LorentzLiu, R.R.LiuLópez-Coto, R.R.López-CotoLypova, I.I.LypovaMarandon, V.V.MarandonMarcowith, A.A.MarcowithMariaud, C.C.MariaudMarx, R.R.MarxMaurin, G.G.MaurinMaxted, N.N.MaxtedMayer, M.M.MayerMeintjes, P. J.P. J.MeintjesMeyer, M.M.MeyerMitchell, A. M. W.A. M. W.MitchellModerski, R.R.ModerskiMohamed, M.M.MohamedMohrmann, L.L.MohrmannMorå, K.K.MoråMoulin, E.E.MoulinMurach, T.T.Murachde Naurois, M.M.de NauroisNiederwanger, F.F.NiederwangerNiemiec, J.J.NiemiecOakes, L.L.OakesO'Brien, P.P.O'BrienOdaka, H.H.OdakaÖttl, S.S.ÖttlOhm, S.S.OhmOstrowski, M.M.OstrowskiOya, I.I.OyaPadovani, MarcoMarcoPadovaniPanter, M.M.PanterParsons, R. D.R. D.ParsonsPekeur, N. W.N. W.PekeurPelletier, G.G.PelletierPerennes, C.C.PerennesPetrucci, P. -O.P. -O.PetrucciPeyaud, B.B.PeyaudPiel, Q.Q.PielPita, S.S.PitaPoon, H.H.PoonProkhorov, D.D.ProkhorovProkoph, H.H.ProkophPühlhofer, G.G.PühlhoferPunch, M.M.PunchQuirrenbach, A.A.QuirrenbachRaab, S.S.RaabReimer, A.A.ReimerReimer, O.O.ReimerRenaud, M.M.Renaudde los Reyes, R.R.de los ReyesRieger, F.F.RiegerRomoli, C.C.RomoliRosier-Lees, S.S.Rosier-LeesRowell, G.G.RowellRudak, B.B.RudakRulten, C. B.C. B.RultenSahakian, V.V.SahakianSalek, D.D.SalekSanchez, D. A.D. A.SanchezSantangelo, A.A.SantangeloSasaki, M.M.SasakiSchlickeiser, R.R.SchlickeiserSchüssler, F.F.SchüsslerSchulz, A.A.SchulzSchwanke, U.U.SchwankeSchwemmer, S.S.SchwemmerSettimo, M.M.SettimoSeyffert, A. S.A. S.SeyffertShafi, N.N.ShafiShilon, I.I.ShilonSimoni, R.R.SimoniSol, H.H.SolSpanier, F.F.SpanierSpengler, G.G.SpenglerSpies, F.F.SpiesStawarz, Ł.Ł.StawarzSteenkamp, R.R.SteenkampStegmann, C.C.StegmannStinzing, F.F.StinzingStycz, K.K.StyczSushch, I.I.SushchTavernet, J. -P.J. -P.TavernetTavernier, T.T.TavernierTaylor, A. M.A. M.TaylorTerrier, R.R.TerrierTibaldo, L.L.TibaldoTiziani, D.D.TizianiTluczykont, M.M.TluczykontTrichard, C.C.TrichardTuffs, R.R.TuffsUchiyama, Y.Y.Uchiyamavan der Walt, D. J.D. J.van der Waltvan Eldik, C.C.van Eldikvan Rensburg, C.C.van Rensburgvan Soelen, B.B.van SoelenVasileiadis, G.G.VasileiadisVeh, J.J.VehVenter, C.C.VenterViana, A.A.VianaVincent, P.P.VincentVink, J.J.VinkVoisin, F.F.VoisinVölk, H. J.H. J.VölkVuillaume, T.T.VuillaumeWadiasingh, Z.Z.WadiasinghWagner, S. J.S. J.WagnerWagner, P.P.WagnerWagner, R. M.R. M.WagnerWhite, R.R.WhiteWierzcholska, A.A.WierzcholskaWillmann, P.P.WillmannWörnlein, A.A.WörnleinWouters, D.D.WoutersYang, R.R.YangZabalza, V.V.ZabalzaZaborov, D.D.ZaborovZacharias, M.M.ZachariasZdziarski, A. A.A. A.ZdziarskiZech, A.A.ZechZefi, F.F.ZefiZiegler, A.A.ZieglerŻywucka, N.N.ŻywuckaFermi-LAT CollaborationKatsuta, J.J.Katsuta2020-10-122020-10-1220180004-6361http://hdl.handle.net/20.500.12386/27718The supernova remnant (SNR) W49B originated from a core-collapse supernova that occurred between one and four thousand years ago, and subsequently evolved into a mixed-morphology remnant, which is interacting with molecular clouds (MC). Gamma-ray observations of SNR-MC associations are a powerful tool to constrain the origin of Galactic cosmic rays, as they can probe the acceleration of hadrons through their interaction with the surrounding medium and subsequent emission of non-thermal photons. We report the detection of a γ-ray source coincident with W49B at very high energies (VHE; E > 100 GeV) with the H.E.S.S. Cherenkov telescopes together with a study of the source with five years of Fermi-LAT high-energy γ-ray (0.06-300 GeV) data. The smoothly connected, combined source spectrum, measured from 60 MeV to multi-TeV energies, shows two significant spectral breaks at 304 ± 20 MeV and 8.4-2.5+2.2 GeV; the latter is constrained by the joint fit from the two instruments. The detected spectral features are similar to those observed in several other SNR-MC associations and are found to be indicative of γ-ray emission produced through neutral-pion decay. The H.E.S.S. gamma-ray excess map (see Fig. 1, in FITS format) of the W49 region is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://cdsarc.u-strasbg.fr">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/612/A5">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/612/A5</A>STAMPAenThe supernova remnant W49B as seen with H.E.S.S. and Fermi-LATArticle10.1051/0004-6361/2015278432-s2.0-85045418660000429404700005https://www.aanda.org/articles/aa/abs/2018/04/aa27843-15/aa27843-15.html2018A&A...612A...5HFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_6 Stars and stellar systems