J/ApJ/864/84ivo://CDS.VizieR/J/ApJ/864/84doi:10.26093/cds/vizier.18640084CDSKeivani A.Murase K.Petropoulou M.Fox D.B.Cenko S.B.Chaty S.,Coleiro A.DeLaunay J.J.Dimitrakoudis S.Evans P.A.Kennea J.A.,Marshall F.E.Mastichiadis A.Osborne J.P.Santander M.Tohuvavohu A.,Turley C.F.2020-03-26T14:18:13Z2019-09-23T09:22:21ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsx-ray-sourcesvisible-astronomybroad-band-photometryultraviolet-astronomyDetection of the IceCube-170922A neutrino coincident with the flaring blazar TXS 0506+056, the first and only ~3{sigma} high-energy neutrino source association to date, offers a potential breakthrough in our understanding of high-energy cosmic particles and blazar physics. We present a comprehensive analysis of TXS 0506+056 during its flaring state, using newly collected Swift, NuSTAR, and X-shooter data with Fermi observations and numerical models to constrain the blazar's particle acceleration processes and multimessenger (electromagnetic (EM) and high-energy neutrino) emissions. Accounting properly for EM cascades in the emission region, we find a physically consistent picture only within a hybrid leptonic scenario, with {gamma}-rays produced by external inverse-Compton processes and high-energy neutrinos via a radiatively subdominant hadronic component. We derive robust constraints on the blazar's neutrino and cosmic-ray emissions and demonstrate that, because of cascade effects, the 0.1-100keV emissions of TXS 0506+056 serve as a better probe of its hadronic acceleration and high-energy neutrino production processes than its GeV-TeV emissions. If the IceCube neutrino association holds, physical conditions in the TXS 0506+056 jet must be close to optimal for high-energy neutrino production, and are not favorable for ultrahigh-energy cosmic-ray acceleration. Alternatively, the challenges we identify in generating a significant rate of IceCube neutrino detections from TXS 0506+056 may disfavor single-zone models, in which {gamma}-rays and high-energy neutrinos are produced in a single emission region. In concert with continued operations of the high-energy neutrino observatories, we advocate regular X-ray monitoring of TXS 0506+056 and other blazars in order to test single-zone blazar emission models, clarify the nature and extent of their hadronic acceleration processes, and carry out the most sensitive possible search for additional multimessenger sources.2018ApJ...864...84Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/864/84CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/swift : Swift Master Catalog (HEASARC, 2004-)VIII/85 : SPECFIND V2.0 Catalog of radio continuum spectra (Vollmer+ 2009)J/MNRAS/397/1177 : Swift-XRT observations of GRBs (Evans+, 2009)J/ApJ/722/520 : Gamma-ray light curves of Fermi blazars (Abdo+, 2010)J/ApJ/742/27 : 15GHz and jet properties of MOJAVE blazars (Lister+, 2011)J/ApJ/748/68 : WISE IR colors of gamma-ray blazars (D'Abrusco+, 2012)J/AJ/146/120 : MOJAVE. X. Parsec-scale kinematics of AGNs (Lister+, 2013)J/other/RAA/14.1135 : Doppler factor for a Fermi blazar sample (Fan+, 2014)J/ApJ/799/86 : Isotropic diffuse gamma emission 0.1-820GeV (Ackermann+, 2015)J/ApJ/810/14 : Third catalog of LAT-detected AGNs (3LAC) (Ackermann+, 2015)J/ApJ/833/117 : VERITAS gamma-ray TeV LCs of 6 blazars (Turley+, 2016)J/AJ/152/12 : MOJAVE. XIII. New 15GHz obs. on 1994-2013 (Lister+, 2016)J/MNRAS/468/4992 : MOJAVE XIV. AGN jets + opening angles (Pushkarev+, 2017)J/ApJS/234/12 : MOJAVE XV. 15GHz obs. of AGN jets 1996-2016 (Lister+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/864/84https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/864/84http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/864/84https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/864/84https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/864/84http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/864/84GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapX-rayUVOpticaldefaultJ/ApJ/864/84/table2Swift UVOT monitoring of TXS 0506+056Exp[32/2930] Exposure timestime.duration;obs.exposureintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[58019.4/58087.2] Modified Julian Date (1)dtime.epochdoublee_MJD[0.0002/0.51] Uncertainty in MJDdstat.error;time.epochfloatFiltFilter used observationinstr.setup;obscharmag[14.19/15.67] Apparent magnitude in Filtermagphot.magfloate_mag[0.03/0.07] The 1-{sigma} uncertainty in magmagstat.error;phot.magfloatJ/ApJ/864/84/table1Swift-XRT monitoring of TXS 0506+056recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[58019.4/58087.2] Modified Julian Datedtime.epochdoublee_MJD[0.001/0.7] MJD uncertaintydstat.error;time.epochfloatExp[0.2/4.9] Exposure timekstime.duration;obs.exposurefloatPInd[1.5/3.5] Photon indexspect.indexfloate_PInd[0.1/1] Negative uncertainty on PInd (1)stat.errorfloatE_PInd[0.1/1.2] Positive uncertainty on PInd (1)stat.error;stat.maxfloatRX[30/255] Count rate0.001countphot.count;em.X-rayfloate_RX[4/25] Negative uncertainty on RX (1)0.001countstat.errorfloatE_RX[4/30] Positive uncertainty on RX (1)0.001countstat.error;stat.maxfloatFX[0.8/6.5] Energy flux in 10^-12^erg/cm^2^/s units1e-15W.m**-2phot.flux;em.X-rayfloate_FX[0.2/1.1] Negative uncertainty on FX (1)1e-15W.m**-2stat.errorfloatE_FX[0.3/2.4] Positive uncertainty on FX (1)1e-15W.m**-2stat.error;stat.maxfloat