J/A+A/623/A175ivo://CDS.VizieR/J/A+A/623/A175doi:10.26093/cds/vizier.36230175CDSMAGIC CollaborationAcciari V.A.Ansoldi S.Antonelli L.A.,Arbet Engels A.Baack D.Babic A.Banerjee B.Bangale P.,Barres de Almeida U.Barrio J.A.Becerra Gonzalez J.Bednarek W.,Bernardini E.Berti A.Besenrieder J.Bhattacharyya W.Bigongiari C.,Biland A.Blanch O.Bonnoli G.Carosi R.Ceribella G.Cikota S.,Colak S.M.Colin P.Colombo E.Contreras J.L.Cortina J.Covino S.,D'Elia V.Da Vela P.Dazzi F.De Angelis A.De Lotto B.Delfino M.,Delgado J.Di Pierro F.Do Souto Espinera E.Dominguez A.,Dominis Prester D.Dorner D.Doro M.Einecke S.Elsaesser D.,Fallah Ramazani V.Fattorini A.Fernandez-Barral A.Ferrara G.,Fidalgo D.Foffano L.Fonseca M.V.Font L.Fruck C.Galindo D.,Gallozzi S.Garcia Lopez R.J.Garczarczyk M.Gaug M.Giammaria P.,Godinovic N.Guberman D.Hadasch D.Hahn A.Hassan T.Herrera J.,Hoang J.Hrupec D.Inoue S.Ishio K.Iwamura Y.Kubo H.Kushida J.,Kuvezdic D.Lamastra A.Lelas D.Leone F.Lindfors E.Lombardi S.,Longo F.Lopez M.Lopez-Oramas A.Maggio C.Majumdar P.Makariev M.,Maneva G.Manganaro M.Mannheim K.Maraschi L.Mariotti M.Martinez M.,Masuda S.Mazin D.Minev M.Miranda J.M.Mirzoyan R.Molina E.,Moralejo A.Moreno V.Moretti E.Munar-Adrover P.Neustroev V.,Niedzwiecki A.Nievas Rosillo M.Nigro C.Nilsson K.Ninci D.,Nishijima K.Noda K.Nogues L.Noethe M.Paiano S.Palacio J.,Paneque D.Paoletti R.Paredes J.M.Pedaletti G.Penil P.Peresano M.,Persic M.Prada Moroni P.G.Prandini E.Puljak I.Garcia J.R.Rhode W.,Ribo M.Rico J.Righi C.Rugliancich A.Saha L.Saito T.Satalecka K.,Schweizer T.Sitarek J.Snidaric I.Sobczynska D.Somero A.,Stamerra A.Strzys M.Suric T.Tavecchio F.Temnikov P.Terzic T.,Teshima M.Torres-Alba N.Tsujimoto S.van Scherpenberg J.Vanzo G.,Vazquez Acosta M.Vovk I.Will M.Zaric D.D'Ammando F.Hada K.,Jorstad S.Marscher A.P.Mobeen M.Z.Hovatta T.Larionov V.M.,Borman G.A.Grishina T.S.Kopatskaya E.N.Morozova D.A.Nikiforova A.A.,Laehteenmaeki A.Tornikoski M.Agudo I.2019-04-08T12:58:01Z2019-03-29T08:56:47ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgamma-ray-astronomybl-lacertae-objectsThe mechanisms producing fast variability of the {gamma}-ray emission in active galactic nuclei (AGNs) are under debate. The MAGIC telescopes detected a fast, very-high-energy (VHE, E>100GeV) {gamma}-ray flare from BL Lacertae on 2015 June 15. The flare had a maximum flux of (1.5+/-0.3)x10^-10^photons/cm^2^/s and halving time of 26+/-8min. The MAGIC observations were triggered by a high state in the optical and high-energy (HE, E>100MeV) {gamma}-ray bands. In this paper we present the MAGIC VHE {gamma}-ray data together with multi-wavelength data from radio, optical, X-rays, and HE {gamma} rays from 2015 May 1 to July 31. Well-sampled multi-wavelength data allow us to study the variability in detail and compare it to the other epochs when fast, VHE {gamma}-ray flares have been detected from this source. Interestingly, we find that the behaviour in radio, optical, X-rays, and HE {gamma}-rays is very similar to two other observed VHE {gamma}-ray flares. In particular, also during this flare there was an indication of rotation of the optical polarization angle and of activity at the 43GHz core. These repeating patterns indicate a connection between the three events. We also test modelling of the spectral energy distribution based on constraints from the light curves and VLBA observations, with two different geometrical setups of two-zone inverse Compton models. In addition we model the {gamma}-ray data with the star-jet interaction model. We find that all of the tested emission models are compatible with the fast VHE {gamma}-ray flare, but all have some tension with the multi-wavelength observations.2019A&A...623A.175Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/623/A175CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/369/758 : VRI photometry of BL Lac (1997-1999) (Fan+, 2001)J/A+A/385/55 : Long-Term Polarization of BL Lac (Hagen-Thorn+ 2002)J/AZh/71/717 : Polarimetric Observations of BL Lac (Gagen-Torn+ 1994)J/PAZh/30/243 : BV(RI)c-JHK photometry of BL Lac in 1999-2001J/MNRAS/373/209 : BATC eim photometry of BL Lac (Hu+, 2006)J/ApJ/787/151 : Fitted jet components in BL Lacertae (Cohen+, 2014)J/ApJ/816/53 : Multiwavelength obs. of BL Lac in 2012-2013 (Wehrle+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/623/A175https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/623/A175http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/623/A175https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/623/A175https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/623/A175http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/623/A175GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap9.939104355462015e-24 2.4516457410139638e-23Gamma-raydefaultJ/A+A/623/A175/f2vheBL Lac daily VHE light curve with upperlimits, same as the top panel in Fig.4. , MAGIC TelescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochfloatFluxFlux, E>200GeV, MAGIC Telescopecm**-2.s**-1phot.flux.density;em.gamma.harddoublee_FluxFlux Error, E>200GeVcm**-2.s**-1stat.error;phot.fluxdoubleFluxUL? Flux Upperlimit, E>200GeVcm**-2.s**-1phot.flux.density;em.gamma.harddoublenullableJ/A+A/623/A175/f4fermi*BL Lac daily GeV light curve, UL marked with errorbar 0. Fermi-LATrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochintFluxFlux, 100 MeV-300 GeV, Fermi-LATcm**-2.s**-1phot.flux.density;em.gamma.harddoublee_FluxFlux Error, 100 MeV-300 GeVcm**-2.s**-1stat.error;phot.fluxdoubleJ/A+A/623/A175/f4xrayBL Lac daily X-ray light curve. Swift/XRTrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochfloatFluxFlux 2-10keV, Swift XRT (erg/cm^2^/s)mW.m**-2phot.flux;em.X-raydoublee_FluxFlux Error 2-10keV (erg/cm^2^/s)mW.m**-2stat.error;phot.fluxdoubleJ/A+A/623/A175/f4uvotBL Lac daily optical light curve in UVOT U, B, V, M2, W1 and W2 bandsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochintFluxFlux, UVOTVmJyphot.flux.densitydoublee_FluxFlux Error, UVOTVmJystat.error;phot.fluxdoubleBand[UBV M2 W1 W2] UVOT bandinstr.bandpasscharJ/A+A/623/A175/f4kvaBL Lac daily optical polarization light curve in R-band, KVA TelescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochfloatFluxFlux, R-band, KVA TelescopemJyphot.flux.density;em.opt.Rfloate_FluxFlux Error, R-band, KVA TelescopemJystat.error;phot.fluxdoubleJ/A+A/623/A175/f4metsBL LAC daily radio light curve at 37GHz, Metsahovi radio telescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochfloatFluxFlux, 37GHz, Metsahovi radio telescopeJyphot.flux.density;em.mm.30-50GHzfloate_FluxFlux ErrorJystat.error;phot.fluxfloatJ/A+A/623/A175/f4ovroBL Lcat daily radio light curve at 15GHz, Owens Valley TelescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochfloatFluxFlux, 15GHz, Owens Valley TelescopeJyphot.flux.density;em.radio.12-30GHzdoublee_FluxFlux ErrorJystat.error;phot.fluxdoubleJ/A+A/623/A175/f2flareBL Lac intraday light curve of MJD 57188, MAGIC TelescoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeElapsed time [min](since MJD=57188.1)mintime.epochfloatFluxFlux, E>200 GeV, MAGIC Telescopecm**-2.s**-1phot.flux.density;em.gamma.harddoublee_FluxFlux Error, E>200 GeVcm**-2.s**-1stat.error;phot.fluxdoubleJ/A+A/623/A175/f4polBL Lac daily optical polarization light curve in R-bandrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Datedtime.epochdoublePPolarization degree%phys.polarizationfloate_P[] Polarization degree errorbar%stat.errorfloatEVPAElectric Vector Position Angledegpos.posAng;pos.pmfloate_EVPAElectric Vector Position Angle errorbardegstat.errorfloatTelName of the Telescopemeta.id;instr.telcharJ/A+A/623/A175/f10sedBL Lac spectral energy distributionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEnergyEnergy in GeVGeVem.energydoublenuFnuFlux, 15GHz, Owens Valley Telescope (erg/cm^2^/s)mW.m**-2phot.fluxdoublee_nuFnuFlux Error, lower value (erg/cm^2^/s)mW.m**-2stat.errordoubleE_nuFnuFlux Error, upper value (erg/cm^2^/s)mW.m**-2stat.error;stat.maxdouble