J/A+A/698/A160ivo://CDS.VizieR/J/A+A/698/A160doi:10.26093/cds/vizier/bc-nt/lbgaCDSRosa V.Foschini L.Ciroi S.2026-08-03T06:54:53Z2025-06-11T10:00:52ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiseyfert-galaxiesx-ray-sourcesgamma-ray-astronomygalaxiesspectroscopyvisible-astronomyWe present a comprehensive investigation into the properties of 1H 0323+342, a prominent jetted narrow-line Seyfert 1 galaxy. The primary objective is to understand the interplay between the relativistic jet, the hot corona, and the accretion disk around the supermassive black hole. This study spans the years 2006 to 2023, incorporating a rich dataset with 172 Swift observations, including the optical, UV, and X-ray bands, integrated with Fermi Large Area Telescope (LAT) observations. Spectral analysis was conducted on the X-ray observations using the XSPEC software, and the results were compared with optical, UV, and gamma-ray flux measurements and photon index values. Our key findings include the identification of three distinct zones in the X-ray photon index-flux plot, characterized by high flux and a hard photon index (zone 1), high flux and a soft photon index (zone 2), and low flux and a soft photon index (zone 3). Before ~2017, 1H 0323+342 moved back and forth between zones 1 and 2; after that epoch, it transitioned to zones 2 and 3. Correspondingly, we observed a decreasing jet activity in the Fermi/LAT data and a reduction in the accretion rate in optical/UV data from Swift/UVOT. We interpret these observations in the framework of an intermittent jet scenario, driven by radiation-pressure instability in the accretion disk.2025A&A...698A.160Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/698/A160CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/698/A160https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/698/A160http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/698/A160https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/698/A160https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/698/A160http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/698/A160GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapGamma-rayX-rayOpticaldefaultJ/A+A/698/A160/xrayResults of the X-ray spectral fitsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of the observation (MJD)dtime.epochdoubleModelModel (pow, power law; bkn, broken power law)meta.notecharGamma1Photon index, for the power-law model, or photon index of the soft component, for the broken power-law modelspect.indexfloate_Gamma1Photon index, for the power-law model, or photon index of the soft component, for the broken power-law model, errorstat.errorfloatF1Integrated 0.3-10keV flux for the power-law model, or soft-component flux, for the broken power-law model (10^-11^erg/cm^2/^s)1e-14W.m**-2phot.flux;em.X-ray.mediumfloate_F1Integrated 0.3-10keV flux for the power-law model, or soft-component flux, for the broken power-law model (10^-11^erg/cm^2/^s), error1e-14W.m**-2stat.errorfloatEbreak? Break energy, for the broken power-law modelkeVphys.energy;phys.atmol.levelfloatnullablee_Ebreak? Break energy, for the broken power-law model, errorkeVstat.errorfloatnullableGamma2? Photon index of the hard component for the broken power-law modelspect.indexfloatnullablee_Gamma2? Photon index of the hard component for the broken power-law model errorstat.errorfloatnullableF2? Hard-component flux, for the broken power-law model (10^-11^erg/cm^2/^s)1e-14W.m**-2phot.fluxfloatnullablee_F2? Hard-component flux, for the broken power-law model (10^-11^erg/cm^2/^s) error1e-14W.m**-2stat.errorfloatnullablechi2{chi}^2^ valuestat.valuefloatdofDegrees of freedomstat.fit.dofintJ/A+A/698/A160/opticalOptical datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of the observation (MJD)dtime.epochdoublealphaOptOptical spectral index as from Eq. (alfao)spect.indexfloate_alphaOptOptical spectral index as from Eq. (alfao) errorstat.errorfloatFVDereddened flux in the V filter (10^-11^erg/cm^2^/s)1e-14W.m**-2phot.flux.density;em.opt.Vfloate_FVDereddened flux in the V filter (10^-11^erg/cm^2^/s) error1e-14W.m**-2stat.errorfloatFBDereddened flux in the B filter (10^-11^erg/cm^2^/s)1e-14W.m**-2phot.flux.density;em.opt.Bfloate_FBDereddened flux in the B filter (10^-11^erg/cm^2^/s) error1e-14W.m**-2stat.errorfloatFUDereddened flux in the U filter (10^-11^erg/cm^2^/s)1e-14W.m**-2phot.flux.density;em.opt.Ufloate_FUDereddened flux in the U filter (10^-11^erg/cm^2^/s) error1e-14W.m**-2stat.errorfloatJ/A+A/698/A160/uvUltraviolet datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of the observation (MJD)dtime.epochdoublealphaUVUltraviolet spectral index as from Eq. (alfao)spect.indexfloate_alphaUVUltraviolet spectral index as from Eq. (alfao) errorstat.errorfloatFUVW1Dereddened flux in the UVW1 filter (10^-11^erg/cm^2^/s)1e-14W.m**-2phot.flux;em.UVfloate_FUVW1Dereddened flux in the UVW1 filter (10^-11^erg/cm^2^/s) error1e-14W.m**-2stat.errorfloatFUVM2Dereddened flux in the UVM2 filter (10^-11^erg/cm^2^/s)1e-14W.m**-2phot.flux;em.UVfloate_FUVM2Dereddened flux in the UVM2 filter (10^-11^erg/cm^2^/s) error1e-14W.m**-2stat.errorfloatFUVW2Dereddened flux in the UVW2 filter (10^-11^erg/cm^2^/s)1e-14W.m**-2phot.flux;em.UVfloate_FUVW2Dereddened flux in the UVW2 filter (10^-11^erg/cm^2^/s) error1e-14W.m**-2stat.errorfloatJ/A+A/698/A160/gamma*gamma-ray data from Fermi/LATrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeTime of the detection (MJD)dtime.epochintGammaGamma-ray photon indexmeta.code;spect.indexfloate_GammaGamma-ray photon index errorstat.errorfloatFluxFlux in the 0.1-100GeV energy band (10^-11^ergs/cm^2^/s)1e-14W.m**-2phot.flux.density;em.gamma.hardfloate_FluxFlux in the 0.1-100GeV energy band (10^-11^ergs/cm^2^/s) error1e-14W.m**-2stat.error;phot.fluxfloatTSTest Statistic \citep{MATTOX1996}stat.fit.goodnessfloat