Ahnen, M. L.M. L.AhnenAnsoldi, S.S.AnsoldiANTONELLI, Lucio AngeloLucio AngeloANTONELLIAntoranz, P.P.AntoranzBabic, A.A.BabicBanerjee, B.B.BanerjeeBangale, P.P.BangaleBarres de Almeida, U.U.Barres de AlmeidaBarrio, J. A.J. A.BarrioBecerra González, J.J.Becerra GonzálezBednarek, W.W.BednarekNishijima, K.K.NishijimaNoda, K.K.NodaNogués, L.L.NoguésOrito, R.R.OritoOverkemping, A.A.OverkempingPaiano, S.S.PaianoPalacio, J.J.PalacioPalatiello, M.M.PalatielloPaneque, D.D.PanequePaoletti, R.R.PaolettiBernardini, E.E.BernardiniParedes, J. M.J. M.ParedesParedes-Fortuny, X.X.Paredes-FortunyPedaletti, G.G.PedalettiPerri, L.L.PerriPERSIC, MassimoMassimoPERSICPoutanen, J.J.PoutanenPrada Moroni, P. G.P. G.Prada MoroniPRANDINI, ELISAELISAPRANDINIPuljak, I.I.PuljakRhode, W.W.RhodeBiasuzzi, B.B.BiasuzziRibó, M.M.RibóRico, J.J.RicoRodriguez Garcia, J.J.Rodriguez GarciaSaito, T.T.SaitoSatalecka, K.K.SataleckaSchultz, C.C.SchultzSchweizer, T.T.SchweizerSillanpää, A.A.SillanpääSitarek, J.J.SitarekSnidaric, I.I.SnidaricBiland, A.A.BilandSobczynska, D.D.SobczynskaSTAMERRA, AntonioAntonioSTAMERRASteinbring, T.T.SteinbringStrzys, M.M.StrzysTakalo, L.L.TakaloTakami, H.H.TakamiTAVECCHIO, FabrizioFabrizioTAVECCHIOTemnikov, P.P.TemnikovTerzić, T.T.TerzićTescaro, D.D.TescaroBlanch, O.O.BlanchTeshima, M.M.TeshimaThaele, J.J.ThaeleTorres, D. F.D. F.TorresToyama, T.T.ToyamaTreves, A.A.TrevesVerguilov, V.V.VerguilovVovk, I.I.VovkWard, J. E.J. E.WardWill, M.M.WillWu, M. H.M. H.WuBonnefoy, S.S.BonnefoyZanin, R.R.ZaninD'AMMANDO, FILIPPOFILIPPOD'AMMANDOBerdyugin, A.A.BerdyuginHovatta, T.T.HovattaMax-Moerbeck, W.W.Max-MoerbeckRAITERI, Claudia MariaClaudia MariaRAITERIReadhead, A. C. S.A. C. S.ReadheadReinthal, R.R.ReinthalRichards, J. L.J. L.RichardsVERRECCHIA, FrancescoFrancescoVERRECCHIABonnoli, G.G.BonnoliVILLATA, MassimoMassimoVILLATABorracci, F.F.BorracciBretz, T.T.BretzBuson, S.S.BusonCarosi, A.A.CarosiChatterjee, A.A.ChatterjeeClavero, R.R.ClaveroColin, P.P.ColinColombo, E.E.ColomboContreras, J. L.J. L.ContrerasCortina, J.J.CortinaCOVINO, StefanoStefanoCOVINODa Vela, P.P.Da VelaDAZZI, FrancescoFrancescoDAZZIDe Angelis, A.A.De AngelisDe Lotto, B.B.De Lottode Oña Wilhelmi, E.E.de Oña WilhelmiDi Pierro, F.F.Di PierroDoert, M.M.DoertDomínguez, A.A.DomínguezDominis Prester, D.D.Dominis PresterDorner, D.D.DornerDoro, M.M.DoroEinecke, S.S.EineckeEisenacher Glawion, D.D.Eisenacher GlawionElsaesser, D.D.ElsaesserFallah Ramazani, V.V.Fallah RamazaniFernández-Barral, A.A.Fernández-BarralFidalgo, D.D.FidalgoFonseca, M. V.M. V.FonsecaFont, L.L.FontFrantzen, K.K.FrantzenFruck, C.C.FruckGalindo, D.D.GalindoGarcía López, R. J.R. J.García LópezGarczarczyk, M.M.GarczarczykGarrido Terrats, D.D.Garrido TerratsGaug, M.M.GaugGiammaria, P.P.GiammariaGodinović, N.N.GodinovićGonzález Muñoz, A.A.González MuñozGora, D.D.GoraGuberman, D.D.GubermanHadasch, D.D.HadaschHahn, A.A.HahnHanabata, Y.Y.HanabataHayashida, M.M.HayashidaHerrera, J.J.HerreraHose, J.J.HoseHrupec, D.D.HrupecHughes, G.G.HughesIdec, W.W.IdecKodani, K.K.KodaniKonno, Y.Y.KonnoKubo, H.H.KuboKushida, J.J.KushidaLA BARBERA, ANTONINOANTONINOLA BARBERALelas, D.D.LelasLindfors, E.E.LindforsLombardi, S.S.LombardiLongo, F.F.LongoLópez, M.M.LópezLópez-Coto, R.R.López-CotoMajumdar, P.P.MajumdarMakariev, M.M.MakarievMallot, K.K.MallotManeva, G.G.ManevaManganaro, M.M.ManganaroMannheim, K.K.MannheimMaraschi, L.L.MaraschiMarcote, B.B.MarcoteMariotti, M.M.MariottiMartínez, M.M.MartínezMazin, D.D.MazinMenzel, U.U.MenzelMiranda, J. M.J. M.MirandaMirzoyan, R.R.MirzoyanMoralejo, A.A.MoralejoMoretti, E.E.MorettiNakajima, D.D.NakajimaNeustroev, V.V.NeustroevNiedzwiecki, A.A.NiedzwieckiNievas Rosillo, M.M.Nievas RosilloNilsson, K.K.Nilsson2020-05-182020-05-1820160035-8711http://hdl.handle.net/20.500.12386/24917The Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) telescopes observed the BL Lac object H1722+119 (redshift unknown) for six consecutive nights between 2013 May 17 and 22, for a total of 12.5 h. The observations were triggered by high activity in the optical band measured by the KVA (Kungliga Vetenskapsakademien) telescope. The source was for the first time detected in the very high energy (VHE, E > 100 GeV) γ-ray band with a statistical significance of 5.9σ. The integral flux above 150 GeV is estimated to be (2.0 ± 0.5) per cent of the Crab nebula flux. We used contemporaneous high energy (HE, 100 MeV < E < 100 GeV) γ-ray observations from Fermi-Large Area Telescope to estimate the redshift of the source. Within the framework of the current extragalactic background light models, we estimate the redshift to be z = 0.34 ± 0.15. Additionally, we used contemporaneous X-ray to radio data collected by the instruments on board the Swift satellite, the KVA, and the Owens Valley Radio Observatory telescope to study multifrequency characteristics of the source. We found no significant temporal variability of the flux in the HE and VHE bands. The flux in the optical and radio wavebands, on the other hand, did vary with different patterns. The spectral energy distribution of H1722+119 shows surprising behaviour in the ∼3 × 10<SUP>14</SUP>-10<SUP>18</SUP> Hz frequency range. It can be modelled using an inhomogeneous helical jet synchrotron self-Compton model.STAMPAenInvestigating the peculiar emission from the new VHE gamma-ray source H1722+119Article10.1093/mnras/stw6892-s2.0-84975078581000379840900074https://academic.oup.com/mnras/article/459/3/3271/25951252016MNRAS.459.3271AFIS/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_10 High energy and particle astronomy – X-rays, cosmic rays, gamma rays, neutrinos