J/A+A/442/249ivo://CDS.VizieR/J/A+A/442/249doi:10.26093/cds/vizier.34420249CDSZhang Y.Liu X.-W.Luo S.-G.Pequignot D.Barlow M.J.2005-11-18T20:11:17Z2005-11-18T21:10:38ZCDS support team

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

cds-question@unistra.frplanetary-nebulaespectroscopyWe present deep optical spectra of the archetypal young planetary nebula (PN) NGC 7027, covering a wavelength range from 3310 to 9160{AA}. The observations were carried out by uniformly scanning a long slit across the entire nebular surface, thus yielding average optical spectra for the whole nebula. A total of 937 emission features are detected. The extensive line list presented here should prove valuable for future spectroscopic analyses of emission line nebulae. The optical data, together with the archival IUE and ISO spectra, are used to probe the temperature and density structures and to determine the elemental abundances from lines produced by different excitation mechanisms.2005A&A...442..249Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/442/249CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/303/175 : Line spectrum of NGC 7027 (Baluteau+, 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/442/249https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/442/249http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/442/249https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/442/249https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/442/249http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/442/249GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/442/249/table2Optical line fluxes on a scale where H{beta}=100MultMultiplet numbercharLTermLower energy termcharUTermUpper energy termcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaObsObserved wavelength0.1nmfloatFlux? Flux, F({lambda}) (F(H{beta})=100)doublenullableu_FluxUncertainty flag on Fluxcharn_Flux[s] s: Saturated even if in short exposurescharInt? Intensity, I({lambda}) (I(H{beta})=100)doublenullablen_lambdaObs[*] *: blendedcharIonIoncharlambdaLab? Laboratory wavelength0.1nmfloatnullableg1? Statistial weight of lower energy level (1)intnullableg2? Statistial weight of upper energy level (1)intnullableJ/A+A/442/249/table4UV line fluxesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength0.1nmintIonIoncharFluxFlux, F({lambda})1e-15W.m**-2floatIntIntensity, I({lambda}) (I(H{beta})=100)float