J/A+AS/114/215ivo://CDS.VizieR/J/A+AS/114/215CDSMagnier E.A.Prins S.van Paradijs J.Lewin W.H.G.Supper R.,Hasinger G.Pietsch W.Truemper J.1999-02-27T11:10:03Z1999-02-27T12:09:49ZCDS support team

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

cds-question@unistra.frsupernova-remnantsh-ii-regionsWe have performed a CCD H{alpha}, [SII], V survey of ~1.0 square degree of the disk of M 31 to search for new supernova remnant (SNR) candidates. We have identified candidates based on a combination of criteria: optical line-flux ratios, the presence or absence of ionizing blue stars, and optical morphology. We have identified a total of 178 candidate SNRs, divided into three confidence categories: 13 with the highest confidence, 54 with moderate confidence, and 111 with the lowest confidence. We have also identified 14 large structures with the characteristics of the superbubbles seen in the Galaxy and Magellanic Clouds. Of our 178 candidates, 15 have been identified in previous searches (Braun & Walterbos 1993; Blair et al. 1981; D'Odorico et al. 1980). We present finding charts of all candidate SNRs and the superbubbles we have noted. We also present a detailed discussion of SNR searches in the Local Group.1995A&AS..114..215Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/114/215CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/114/215https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/114/215http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/114/215https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/114/215https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/114/215http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/114/215GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/114/215/table3 (The superbubbles)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/114/215/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/114/215/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/114/215/table3?GETtext/xml+votable180.050000true9.931840.34560.005555555555555556Cone search capability for table J/A+AS/114/215/table4 (Our highest-confidence SNR candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/114/215/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/114/215/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/114/215/table4?GETtext/xml+votable180.050000true9.93740.49790.005555555555555556Cone search capability for table J/A+AS/114/215/table5 (Our middle-confidence SNR candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/114/215/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/114/215/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/114/215/table5?GETtext/xml+votable180.050000true9.999740.34580.005555555555555556Cone search capability for table J/A+AS/114/215/table6 (Our lowest-confidence SNR candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/114/215/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/114/215/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/114/215/table6?GETtext/xml+votable180.050000true9.876540.35370.005555555555555556Cone search capability for table J/A+AS/114/215/table7 (SNR candidates from other authors not identified in our images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/114/215/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/114/215/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/114/215/table7?GETtext/xml+votable180.050000true9.444740.39150.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/114/215?format=asciiOpticaldefaultJ/A+AS/114/215/table1Image parametersExpVExposure time in Vstime.duration;obs.exposureintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField numbermeta.id;meta.mainintn_Field[b] Note on field (1)meta.notecharRAdRight ascension (J2000.0)degpos.eq.ra;meta.mainDEdDeclination (J2000.0)degpos.eq.dec;meta.mainExpHaExposure time in H{alpha}stime.duration;obs.exposureintExpSIIExposure time in [SII]stime.duration;obs.exposureintNoiseHa? Noise/pixel in H{alpha}1e-16mW.m**-2.pixel**-1instr.det.noisefloatnullableNoiseSII? Noise/pixel in [SII]1e-16mW.m**-2.pixel**-1instr.det.noisefloatnullableJ/A+AS/114/215/table2O and early B stars and their Stroemgren spheresrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpSpectral typesrc.spTypecharMVmagAbsolute V magnitudemagphys.magAbs;em.optfloatVmagApparent V magnitudemagphot.mag;em.opt.VfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.VfloatlogN(Lyc)Production rate of Lyman continuum photonslog(s**-1)phys.luminosityfloatlogL(Ha)Expected H{alpha} luminosity at the distance of M 31log(1e-07W)phys.luminosityfloatlogF(Ha)Expected H{alpha} flux at the distance of M 31log(mW.m**-2)phot.fluxfloatUExcitation parameter for such photon ratepc.cm**-2phys.excitParamfloatRadStroemgren sphere radii for a ISM density n_H_=1cm^-3^pcphys.size.radiusfloatlog(NH)Hydrogen column density for n_H_=1cm^-3^log(cm**-2)phys.columnDensityfloatAVExpected optical extinction for n_H_=1cm^-3^magphys.absorptionfloatRad100Stroemgren sphere radii for a ISM density n_H_=100cm^-3^pcphys.size.radiusfloatlog(NH)100Hydrogen column density for n_H_=100cm^-3^log(cm**-2)phys.columnDensityfloatAV100Expected optical extinction for n_H_=100cm^-3^magphys.absorptionfloatNote1[*] * for HII regions detectable in our images (bold lines in printed table)meta.notecharNote2[c] c for stars included in the completness limit of our blue star listmeta.notecharJ/A+AS/114/215/table3The superbubblesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDeltaRAApproximate extent of the object in right ascensionarcsecphys.angSize;pos.eq.rafloatDeltaDEApproximate extent of the object in declinationarcsecphys.angSize;pos.eq.decfloatDiam? Diameter of the objectarcsecphys.angSize;srcfloatnullablen_DiamWhen '*' extrapolated diametermeta.notecharPictPicture numbermeta.idcharFigFigure number (5a through 5m)meta.bib.figcharFieldField number in which the candidate was identifiedobs.fieldintCommentsCommentsmeta.notecharJ/A+AS/114/215/table4Our highest-confidence SNR candidatesCommentsCommentsmeta.notecharPictPicture numbermeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDeltaRAApproximate extent of the object in right ascensionarcsecphys.angSize;pos.eq.rafloatDeltaDEApproximate extent of the object in declinationarcsecphys.angSize;pos.eq.decfloatDiam? Diameter of the objectarcsecphys.angSize;srcfloatnullablen_DiamWhen '*' extrapolated diametermeta.notecharFigFigure number (5a through 5m)meta.bib.figcharFieldField number in which the candidate was identifiedobs.fieldintJ/A+AS/114/215/table5Our middle-confidence SNR candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDeltaRAApproximate extent of the object in right ascensionarcsecphys.angSize;pos.eq.rafloatDeltaDEApproximate extent of the object in declinationarcsecphys.angSize;pos.eq.decfloatDiam? Diameter of the objectarcsecphys.angSize;srcfloatnullablen_DiamWhen '*' extrapolated diametermeta.notecharPictPicture numbermeta.idcharFigFigure number (5a through 5m)meta.bib.figcharFieldField number in which the candidate was identifiedobs.fieldintCommentsCommentsmeta.notecharJ/A+AS/114/215/table6Our lowest-confidence SNR candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDeltaRAApproximate extent of the object in right ascensionarcsecphys.angSize;pos.eq.rafloatDeltaDEApproximate extent of the object in declinationarcsecphys.angSize;pos.eq.decfloatDiam? Diameter of the objectarcsecphys.angSize;srcfloatnullablen_DiamWhen '*' extrapolated diametermeta.notecharPictPicture numbermeta.idcharFigFigure number (5a through 5m)meta.bib.figcharFieldField number in which the candidate was identifiedobs.fieldintCommentsCommentsmeta.notecharJ/A+AS/114/215/table7SNR candidates from other authors not identified in our imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDSNR Identificationmeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainCommentsCommentsmeta.notechar