J/A+A/369/57ivo://CDS.VizieR/J/A+A/369/57doi:10.26093/cds/vizier.33690057CDSSantos-Lleo M.Clavel J.Schulz B.Altieri B.Barr P.Alloin D.Berlind P.Bertram R.Crenshaw DEdelson R.A.Giveon U.Horne K.,Huchra J.P.Kaspi S.Kriss G.A.Krolik J.H.Malkan M.A.Malkov Yu.F.,Netzer H.O'Brien P.T.Peterson B.M.Pogge R.W.Pronik V.I.Qian B.-C.,Reichert G.A.Rodriguez-Pascual P.M.Sergeev S.G.Tao J.Tokarz S.,Wagner R.M.Wamsteker W.Wilkes B.J.2001-03-31T16:34:03Z2001-03-31T16:33:59ZCDS support team

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

cds-question@unistra.frseyfert-galaxiesinfrared-photometryvisible-astronomyWide-band photometryspectroscopyMid-infrared images of the Seyfert 1 galaxy Mrk 279 obtained with the ISO satellite are presented together with the results of a one-year monitoring campaign of the 2.5-11.7{mu}m spectrum. Contemporaneous optical photometric and spectrophotometric observations are also presented. The galaxy appears as a point-like source at the resolution of the ISOCAM instrument (4-5"). The 2.5-11.7{mu}m average spectrum of the nucleus in Mrk 279 shows a strong power law continuum with {alpha}=-0.80+/-0.05 (F_{nu}_{prop.to}{nu}^{alpha}^) and weak PAH emission features. The Mrk 279 spectral energy distribution shows a mid-IR bump, which extends from 2 to 15-20{mu}m. The mid-IR bump is consistent with thermal emission from dust grains at a distance of >100 light-days. No significant variations of the mid-IR flux have been detected during our observing campaign, consistent with the relatively low amplitude (~10% rms) of the optical variability during the campaign. The time delay for H{beta} line emission in response to the optical continuum variations is {tau}=16.7^+5.3^_-5.6_days, consistent with previous measurements.2001A&A...369...57Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/369/57CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/369/57https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/369/57http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/369/57https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/369/57https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/369/57http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/369/57GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/A+A/369/57/table4Optical Photometry from Wise ObservatoryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateUT Datetime.epochnullableHJDHeliocentric Julian Datedtime.epochdoubleBmagB magnitude (1)magphot.mag;em.opt.Bfloate_Bmagrms uncertainty on Bmagmagstat.errorfloatVmag? V magnitude (1)magphot.mag;em.opt.Vfloatnullablee_Vmag? rms uncertainty on Vmagmagstat.errorfloatnullableRmagR magnitude (1)magphot.mag;em.opt.Rfloate_Rmagrms uncertainty on Rmagmagstat.errorfloatImag? I magnitude (1)magphot.mag;em.opt.Ifloatnullablee_Imag? rms uncertainty on Imagmagstat.errorfloatnullableJ/A+A/369/57/table5Optical Continuum and H{beta} fluxesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleF5100AOptical continuum (at 5100{AA}) (1)1e-17W.m**-2.nm**-1phot.flux.density;em.optfloate_F5100Arms uncertainty on F5100A1e-17W.m**-2.nm**-1stat.errorfloatFHbH{beta} flux (1)1e-16W.m**-2phot.flux;em.line.Hbetafloate_FHbrms uncertainty on Hb1e-16W.m**-2stat.errorfloat