J/A+AS/92/625ivo://CDS.VizieR/J/A+AS/92/625CDSWalterbos R.A.M.Braun R.2012-11-13T12:50:44Z2003-05-31T19:55:32ZCDS support team

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

cds-question@unistra.frgalaxiessurveysnebulaeh-ii-regionsDeep CCD imagery in H{alpha} and [SII] is presented of the major spiral arms of M31 with particular attention given to the data reduction and the analysis of the [SII]/H{alpha} flux ratios. A diffuse ionized gas noted in the images is analyzed which shows higher [SII]/H{alpha} ratios, and 967 discrete nebulae are listed with gray-scale images, finding charts, and absolute fluxes. The differential H-alpha luminosity function is found to have a slope of -0.95 for brighter objects and flattens out below a critical level. The curve is shown to correspond to the point at which single-star ionization accounts for the H{alpha} luminosities and is consistent with previous observations. The catalog of objects and fluxes is the largest existing sample of this type, and the unresolved objects in the sample are considered to be planetary nebulae.1992A&AS...92..625Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/92/625CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/92/625https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/92/625http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/92/625https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/92/625https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/92/625http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/92/625GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/92/625/table2 (Catalog of ionized nebulae in M31)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/92/625/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/92/625/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/92/625/table2?GETtext/xml+votable180.050000true10.4972104141.458772580.0055555555555555566/2623 2666 2709 2752https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/92/625?format=asciiOpticaldefaultJ/A+AS/92/625/table2Catalog of ionized nebulae in M31recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSource ID in the catalog.meta.id;meta.mainintRA1950Right ascension 1950pos.eq.ra;meta.maine_RA1950rms uncertainty on right ascensionsstat.error;pos.eq.rafloatDE1950Declination 1950pos.eq.dec;meta.maine_DE1950rms uncertainty on declinationarcsecstat.error;pos.eq.decfloatMajAxisSource major axis (4)arcsecphys.angSizefloate_MajAxisrms uncertainty on source major axis (4)arcsecstat.error;phys.angSizefloatMinAxisSource minor axis (4)arcsecphys.angSize;srcfloate_MinAxisrms uncertainty on source minor axis (4)arcsecstat.error;phys.angSizefloatPAMajor axis position angle (east of north)degpos.posAngfloate_PArms uncertainty on PAdegstat.errorfloatRminMinimum radius of annular region (1)arcsecphys.angSize;srcfloatRmaxMaximum radius of annular region (1)arcsecphys.angSize;srcfloatH-alpIntegrated source flux in Halpha (10^-15^ erg/cm2/s)1e-18W.m**-2phot.fluxfloate_H-alprms uncertainty on Halpha flux1e-18W.m**-2stat.errorfloat[SII]Integrated [SII] source flux (5)1e-18W.m**-2phot.fluxfloate_[SII]rms uncertainty on [SII] flux1e-18W.m**-2stat.errorfloatX? Major axis coordinate of the sourcearcminphys.angSizefloatnullableY? Minor axis coordinate of the sourcearcminphys.angSizefloatnullableR1Radius within the galaxy of the spiral arm "most likely" associated with the source (2)arcminphys.angSize;srcfloatR2Second possible radius (2)arcminphys.angSize;srcfloatV1Radial heliocentric velocity at R1 (2)km/sphys.veloc;pos.heliocentricfloatV2Radial heliocentric velocity at R2 (2)km/sphys.veloc;pos.heliocentricfloatdY1Minor axis offsets of the source position from the "most likely" spiral armarcminpos.angDistancefloatdY2Minor axis offsets of the source position from the second armarcminpos.angDistancefloattau1Optical depth at Halpha at radius R1 (3)phys.absorption.opticalDepthfloattau2Optical depth at Halpha at radius R2 (3)phys.absorption.opticalDepthfloatH-alp'Optical-depth-corrected flux in Halpha (6)1e-18W.m**-2phot.fluxfloate_H-alp'rms uncertainty on H-alp'1e-18W.m**-2stat.errorfloat[SII]'Optical-depth-corrected flux in [SII] (6)1e-18W.m**-2phot.fluxfloate_[SII]'rms uncertainty on [SII]'1e-18W.m**-2stat.errorfloatXref? Cross-reference ID to larger sources within the catalog in which the listed entry is embedded.meta.id.parentintnullableMorph[CDR123 ] Morphology (7)meta.code;src.morphcharNotes[cS? ] Notes (8)meta.notechar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexed