J/ApJ/954/33ivo://CDS.VizieR/J/ApJ/954/33doi:10.26093/cds/vizier/ba-xt-11CDSLewin C.Kara E.Cackett E.M.Wilkins D.Panagiotou C.Garcia J.A.,Gelbord J.2026-07-02T12:00:34Z2025-12-05T09:21:52ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiinfrared-photometryvisible-astronomybroad-band-photometryultraviolet-photometryUV and optical continuum reverberation mapping is a powerful tool for probing the accretion disk and inner broad-line region. However, recent reverberation mapping campaigns in the X-ray, UV, and optical have found lags consistently longer than those expected from the standard disk reprocessing picture. The largest discrepancy to date was recently reported in Mrk 335, where UV/optical lags are up to 12 times longer than expected. Here, we perform a frequency-resolved time lag analysis of Mrk 335, using Gaussian processes to account for irregular sampling. For the first time, we compare the Fourier frequency-resolved lags directly to those computed using the popular interpolated cross-correlation function method applied to both the original and detrended light curves. We show that the anticipated disk reverberation lags are recovered by the Fourier lags when zeroing in on the short-timescale variability. This suggests that a separate variability component is present on long timescales. If this separate component is modeled as reverberation from another region beyond the accretion disk, we constrain a size scale of roughly 15 lt-days from the central black hole. This is consistent with the size of the broad- line region inferred from H{beta} reverberation lags. We also find tentative evidence for a soft X-ray lag, which we propose may be due to light travel time delays between the hard X-ray corona and distant photoionized gas that dominates the soft X-ray spectrum below 2 keV.2023ApJ...954...33Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/954/33CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/swift : Swift Master Catalog (HEASARC, 2004-)VI/139 : Herschel Observation Log (Herschel Science Centre, 2013)I/356 : Gaia DR3 Part 2. Extra-galactic (Gaia Collaboration, 2022)I/358 : Gaia DR3 Part 4. Variability (Gaia Collaboration, 2022)J/A+A/389/845 : Spectra of blue compact galaxies (Kong+, 2002)J/A+A/418/465 : Mid-infrared and hard X-ray emission in AGN (Lutz+, 2004)J/ApJ/618/L83 : Narrow iron K{alpha} lines in AGN (Zhou+, 2005)J/ApJ/622/129 : Lag-luminosity relationship in AGN (Sergeev+, 2005)J/ApJ/658/815 : Radio loudness of active galactic nuclei (Sikora+, 2007)J/ApJ/679/194 : Low-z intergalactic medium. III. (Danforth+, 2008)J/ApJ/702/767 : CIV and FeK{alpha} Baldwin effects in AGNs (Wu+, 2009)J/ApJ/702/1472 : Column densities for HI, AlIII, SiIV, CIV, OVI (Savage+, 2009)J/ApJ/705/14 : Seyfert galaxies in the mid-IR (Deo+, 2009)J/ApJ/713/L11 : X-ray properties of Seyfert 1 galaxies (Zhou+, 2010)J/ApJ/739/57 : Ultra hard X-ray AGNs in the Swift/BAT survey (Koss+, 2011)J/ApJ/753/104 : AGN identifications from AKARI and Swift (Matsuta+, 2012)J/ApJ/753/L2 : Reverberation mapping of AGNs (Assef+, 2012)J/ApJ/755/60 : Reverberation mapping for 5 Seyfert 1 galaxies (Grier+, 2012)J/ApJ/759/112 : The UV low-redshift intergalactic medium (Tilton+, 2012)J/ApJ/782/45 : SEAMBHs. I. Mrk 142, Mrk 335, and IRAS F12397+3333 (Du+, 2014)J/ApJ/788/159 : 17 Seyfert 1 galaxies light curves (Koshida+, 2014)J/ApJ/793/108 : SEAMBHs. II. Continuum and Hbeta LCs (Wang+, 2014)J/ApJ/794/75 : HST-COS UV spectra observations of AGNs (Stevans+, 2014)J/ApJ/806/22 : SEAMBHs IV. H{beta} time lags (Du+, 2015)J/MNRAS/448/1541 : Spectral parameters for Mrk 335 and Ark 564 (Sarma+, 2015)J/ApJS/216/17 : AKARI 2.5-5um spectra of nearby Type-1 AGNs (Kim+, 2015)J/A+A/588/A70 : Hard X-ray view of the soft excess in AGN (Boissay+, 2016)J/ApJS/230/6 : HST -COS & -STIS absorption-line sp. II. (Keeney+, 2017)J/MNRAS/466/3309 : X-ray flux variability of AGN (Rani+, 2017)J/MNRAS/467/540 : BASS. IV. NIR lines & correl. with X-ray (Lamperti+, 2017)J/ApJ/871/35 : HST/COS spectra of QSOs with SiIV data (Zheng+, 2019)J/ApJ/886/42 : Reverberation mapping & opt. spectra data of AGNs (Du+, 2019)J/ApJS/253/20 : SEAMBHs XII. Reberberation mapping for 15 PG QSOs (Hu+, 2021)J/A+A/645/A18 : SVOM-ECLAIRs known X-ray sources catalogue (Dagoneau+, 2021)J/other/Sci/373.789 : optical variability of AGNs (Burke+, 2021)J/ApJ/941/46 : X-ray to FIR observations for an AGN sample (Spinoglio+, 2022)J/ApJ/947/62 : griz light curves of Mrk 335 (Kara+, 2023)J/ApJS/269/15 : Survey of bare z<0.2 AGNs. I. X-ray soft excess (Nandi+, 2023)J/A+A/691/A203 : Multiwavelength properties of unobscured AGN (Gupta+, 2024)J/A+A/691/A15 : High-redshift quasars spectra (Deconto-Machado+, 2024)J/A+A/698/A105 : AGN optical ASAS-SN and TESS light curves (Yuk+, 2025)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/954/33https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/954/33http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/954/33https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/954/33https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/954/33http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/954/33GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVOpticalInfrareddefaultJ/ApJ/954/33/uvotMrk 335 Swift UVOT light curve data (Data behind Figure 1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[58770.1/58869.32] MJD time stamp at the mid-point of the UVOT exposure (JD-2400000.5)dtime.epochdoublee_MJD[0.0001/0.005] A symmetric "error" bar for the MJD values (1)dstat.error;time.epochdoubleHJD[58770.6/58869.81] Mid-point of UVOT exposure translated to HJD; HJD-2400000dtime.epoch;obs.exposuredoubleObs.DateCalendar date derived from MJD value'Y:M:D'time.epochnullableObs.TimeTime (UTC) based upon MJD valuetime.epochnullableExpTime[26.7/800] Integrated time of the exposure (2)stime.epoch;obs.exposuredoubleFiltSwift UVOT Filtermeta.code;instr.filtercharObsIDSwift observation ID (3)meta.id;obsExt[1/2] Number of the image extension in the Swift sky data file (4)meta.numberintFlux[4.8e-15/2.2e-14] UVOT flux in erg/cm^2^/s/{AA}, measured in a 5 arcsec radius aperturecW.m**-2.nm**-1phot.fluxdoublee_Flux[9.3e-17/6.6e-16] 1-sigma flux measurement uncertaintycW.m**-2.nm**-1stat.error;phot.fluxdoubleLowMaskFlag, LowMask_smScaleSens_flag (5)meta.codecharMidMaskFlag, MidMask_smScaleSens_flag (5)meta.codecharHighMaskFlag, HighMask_smScaleSens_flag (5)meta.codecharIBRM[true] Flag, true if an observation was made during the IBRM campaign (always "true")meta.codecharFluxcorr[0.97/1.22] Flag, Flux_corrFactor_smScaleSens_provisional (6)arith.factor;phot.fluxdoubleJ/ApJ/954/33/grizMrk 335 ground-based (griz) light curve data (Data behind Figure 1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFilt[griz] Filtermeta.id;instr.filtercharHJD[8700.9/8886.2] Heliocentric Julian Date; HJD-2450000dtime.epochdoubleFlux[3.2/7.7] Observed Flux in units of 10^-15^erg/cm^2^/s/{AA}1e-17W.m**-2.nm**-1phot.fluxfloate_Flux[0.003/0.2] Flux Uncertainty1e-17W.m**-2.nm**-1stat.error;phot.fluxfloatTelTelescope Used (1)meta.id;instr.telchar