J/ApJ/891/68ivo://CDS.VizieR/J/ApJ/891/68doi:10.26093/cds/vizier.18910068CDSChavushyan V.Patino-Alvarez V.M.Amaya-Almazan R.A.Carrasco L.2024-02-13T11:26:12Z2021-09-07T15:11:02ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleispectroscopyultraviolet-astronomyWe report on the detection of a statistically significant flare-like event in the MgII{lambda}2798{AA} emission line and the UV FeII band of CTA 102 during the outburst of fall 2017. The ratio between the maximum and minimum of {lambda}3000{AA} continuum flux for the observation period (2010-2017) is 179+/-15. Respectively, the max/min ratios 8.1+/-10.5 and 34.0+/-45.5 confirmed the variability of the MgII emission line and of the FeII band. The highest levels of emission line fluxes recorded coincide with a superluminal jet component traversing through a stationary component located ~0.1mas from the 43GHz core. Additionally, comparing the MgII line profile in the minimum of activity against the one in the maximum, we found that the latter is broader and blueshifted. As a result of these findings, we can conclude that the non-thermal continuum emission produced by material in the jet moving at relativistic speeds is related to the broad emission line fluctuations. Consequently, these fluctuations are also linked to the presence of broad-line region (BLR) clouds located ~25pc from the central engine, outside the inner parsec, where the canonical BLR is located. Our results suggest that during strong activity in CTA 102, the source of non-thermal emission and broad-line clouds outside the inner parsec introduces uncertainties in the estimates of black hole (BH) mass. Therefore, it is important to estimate the BH mass, using single-epoch or reverberation mapping techniques, only with spectra where the continuum luminosity is dominated by the accretion disk.2020ApJ...891...68Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/891/68CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/130/1418 : AGN jet kinematics (Jorstad+, 2005)J/AJ/134/799 : Multiwaveband polarimetry of 15 AGN (Jorstad+, 2007)J/A+A/486/99 : Long-term spectral variability of NGC 4151 (Shapovalova+, 2008)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)J/ApJ/748/49 : Optical spectroscopy of 1LAC broad-line blazars (Shaw+, 2012)J/ApJ/763/L36 : MgII and FeII flux of the blazar 3C 454.3 (Leon-Tavares+, 2013)J/A+A/551/A32 : Catching the radio flare in CTA 102 (Fromm+, 2013)J/ApJ/813/51 : {gamma}-ray to IR study of the blazar CTA 102 (Casadio+, 2015)J/ApJ/846/98 : Jet kinematics of blazars at 43GHz with VLBA (Jorstad+, 2017)J/ApJ/880/46 : Spectroscopy & V-band monitoring of CTS C30.10 (Czerny+, 2019)J/ApJS/247/33 : The Fermi LAT fourth source catalog (4FGL) (Abdollahi+, 2020)http://james.as.arizona.edu/~psmith/Fermi/ : Fermi monitoring program datahttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/891/68https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/891/68http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/891/68https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/891/68https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/891/68http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/891/68GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap6.621484330165357e-19 6.621484330165357e-19UVdefaultJ/ApJ/891/68/table1Flux measurements for the MgII{lambda}2798{AA} emission line, the FeII UV band, and the {lambda}3000{AA} continuumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[5443.93/8306.89] Julian Date of observation; JD-2450000dtime.epochfloatMgII[0.69/5.57] MgII 2798 flux in 10^-13^erg/s/cm^2^ units1e-16W.m**-2phot.fluxfloate_MgII[0.04/7] Uncertainty in MgII1e-16W.m**-2stat.errorfloatFeII[0.23/7.7] UV FeII flux in 10^-13^erg/s/cm^2^ units1e-16W.m**-2phot.fluxfloate_FeII[0.04/10] Uncertainty in FeII1e-16W.m**-2stat.errorfloatCont[3/560] Continuum (3000{AA}) flux in 10^-15^erg/s/cm^2^/{AA} units1e-17W.m**-2.nm**-1phot.fluxfloate_Cont[0.1/22.1] Uncertainty in Cont1e-17W.m**-2.nm**-1stat.errorfloat