J/AJ/146/78ivo://CDS.VizieR/J/AJ/146/78doi:10.26093/cds/vizier.51460078CDSGrupe D.Komossa S.Scharwachter J.Dietrich M.Leighly K.M.Lucy A.,Barlow B.N.2017-06-21T08:22:41Z2014-08-29T09:28:45ZCDS support team

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

cds-question@unistra.frseyfert-galaxiesactive-galactic-nucleivisible-astronomybroad-band-photometryultraviolet-photometryx-ray-sourcesWe report on multi-wavelength observations of the X-ray transient Narrow Line Seyfert 1 (NLS1) galaxy WPVS007. The galaxy was monitored with Swift between 2005 October and 2013 July, after it had previously undergone a dramatic drop in its X-ray flux. For the first time, we are able to repeatedly detect this NLS1 in X-rays again. This increased number of detections in the last couple of years may suggest that the strong absorber that has been found in this active galactic nucleus (AGN) is starting to become leaky and may eventually disappear. The X-ray spectra obtained for WPVS007 are all consistent with a partial covering absorber model. A spectrum based on the data during the extreme low X-ray flux states shows that the absorption column density is of the order of 4x10^23^/cm2 with a covering fraction of 95%. WPVS007 also displays one of the strongest UV variabilities seen in NLS1s. The UV continuum variability anti-correlates with the optical/UV slope {alpha}_UV_, which suggests that the variability may be primarily due to reddening. The UV variability timescales are consistent with moving dust "clouds" located beyond the dust sublimation radius of R_sub_{approx}20lt-days. We present for the first time near-infrared JHK data of WPVS007, which reveal a rich emission-line spectrum. Recent optical spectroscopy does not indicate significant variability in the broad permitted and FeII emission lines, implying that the ionizing continuum seen by those gas clouds has not significantly changed over the last decades. All X-ray and UV observations are consistent with a scenario in which an evolving broad absorption line (BAL) flow obscures the continuum emission. As such, WPVS007 is an important target for our understanding of BAL flows in low-mass AGNs.2013AJ....146...78Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/146/78CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/187/64 : The simultaneous optical-to-X-ray SED of AGNs (Grupe+, 2010)J/AJ/127/156 : Soft X-Ray-Selected AGNs complete sample (Grupe+, 2004)J/A+A/350/805 : X-ray selected ROSAT AGN spectra (Grupe+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/146/78https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/146/78http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/146/78https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/146/78https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/146/78http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/146/78GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap3.377399441402775e-19 1.2058628298368645e-18X-rayUVOpticaldefaultJ/AJ/146/78/table2Swift UVOT magnitudes of WPVS 007recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsID[30334/91017] Observation identifiermeta.id;obs.param;obsintSeg[1/77] Segmentmeta.id;obsintMJD[53663/56487] Modified Julian Datedtime.epochdoubleObsSimbad column added by the CDSmeta.ref.urlintnullableVmag? Swift/UVOT V filter magnitude (G1)magphot.mag;em.opt.Vfloatnullablee_Vmag? Uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatnullableBmag? Swift/UVOT B filter magnitude (G1)magphot.mag;em.opt.Bfloatnullablee_Bmag? Uncertainty in Bmagmagstat.error;phot.mag;em.opt.BfloatnullableUmag? Swift/UVOT U filter magnitude (G1)magphot.mag;em.opt.Ufloatnullablee_Umag? Uncertainty in Umagmagstat.error;phot.mag;em.opt.Ufloatnullablew1mag? Swift/UVOT UVW1 filter magnitude (G1)magphot.mag;em.UVfloatnullablee_w1mag? Uncertainty in w1magmagstat.error;phot.magfloatnullablem2mag? Swift/UVOT UVM2 filter magnitude (G1)magphot.mag;em.UVfloatnullablee_m2mag? Uncertainty in m2magmagstat.error;phot.magfloatnullablew2mag? Swift/UVOT UVW2 filter magnitude (G1)magphot.mag;em.UVfloatnullablee_w2mag? Uncertainty in w2magmagstat.error;phot.magfloatnullableaUV? Optical/UV spectral slope {alpha}_UV_ (1)spect.indexfloatnullablee_aUV? Uncertainty in aUVstat.errorfloatnullableXlimSwift XRT 3{sigma} count rate upper limit (0.2-2keV) (from table3)ct/ksphot.count;em.X-rayfloatnullableJ/AJ/146/78/table1Swift observation log of WPVS 007 after 2008 JanuaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsID[30334/91017] Observation identifiermeta.id;obs.param;obsintSeg[1/77] Segment numbermeta.id;obsintDstartUT starting date of observationtime.start;obsnullableTstartUT starting time of observationtime.epochnullableDendUT ending date of observationtime.end;obsnullableTendUT ending time of observationtime.epochnullableMJDModified Julian Datedtime.epochdoubleTXRTTotal exposure time with the Swift X-Ray Telescope (XRT)stime.epochintTV? Total exposure time with UVOT V filter (G1)stime.epochintnullableTB? Total exposure time with UVOT B filter (G1)stime.epochintnullableTU? Total exposure time with UVOT U filter (G1)stime.epochintnullableTw1? Total exposure time with UVOT UVW1 filter (G1)stime.epochintnullableTm2? Total exposure time with UVOT UVM2 filter (G1)stime.epochintnullableTw2? Total exposure time with UVOT UVW2 filter (G1)stime.epochintnullableObsResults of this photometrymeta.ref.urlcharJ/AJ/146/78/table3Swift XRT 3{sigma} upper limits of WPVS 007Seg[1/77] Segmentmeta.id;obsintMJD[53663/56487] Modified Julian Datetime.epochdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsID[30334/91017] Observation identifiermeta.id;obs.param;obsintObsSimbad column added by the CDSmeta.ref.urlintnullableLimitSwift XRT 3{sigma} upper limit (1)ct/ksphot.count;em.X-rayfloatPhotSimbad column added by the CDSmeta.ref.urlintnullable