J/A+A/407/527ivo://CDS.VizieR/J/A+A/407/527doi:10.26093/cds/vizier.34070527CDSBaume G.Villanova S.Carraro G.2003-12-09T20:06:18Z2003-12-09T21:05:37ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomybroad-band-photometryWe present CCD UBV(I)c observations obtained in the field of the previously unstudied northern open clusters NGC 1582 and NGC 1663. For the former, we also provide high-resolution spectra of the brightest stars and complement our data with Two-Micron All Sky-Survey (2MASS) near-infrared photometry and with astrometric data from the Tycho-2 catalog. From the analysis of all these data, we argue that NGC 1582 is a very poor, quite large and heavily contaminated open cluster. It turns out to have a reddening E(B-V)=0.35+/-0.03, to be situated 1100+/-100pc from the Sun and to have an age of 300+/-100Myr. On the other hand, we were not able to unambiguously clarify the nature of NGC 1663. By assuming it is a real cluster and from the analysis of its photometric diagrams, we found a color excess value E(B-V)=0.20, an intermediate age value (~2000Myr) and a distance of about 700pc. The distribution of the stars in the region however suggests we are probably facing an open cluster remnant. As an additional result, we obtained aperture photometry of three previously unclassified galaxies placed in the field of NGC 1663 and performed a preliminary morphological classification of them.2003A&A...407..527Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/407/527CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/407/527https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/407/527http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/407/527https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/407/527https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/407/527http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/407/527GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/407/527/table3 (Photometric catalogue of the NGC 1582 region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/407/527/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/407/527/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/407/527/table3?GETtext/xml+votable180.050000true67.76333343.7652780.005555555555555556Cone search capability for table J/A+A/407/527/table5 (Photometric catalogue of the NGC 1663 region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/407/527/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/407/527/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/407/527/table5?GETtext/xml+votable180.050000true72.2037513.2422780.0055555555555555566/1794-1795 23422https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/407/527?format=asciiOpticalInfrareddefaultJ/A+A/407/527/table3Photometric catalogue of the NGC 1582 regionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq? Identification number (this work) (1)meta.id;meta.mainintnullable2MASSIdentification from 2MASS (<II/246>) cataloguemeta.id.crosscharTYCIdentification from Tycho-2 (<I/259>) cataloguemeta.idcharHD/GSCHD or GSC identificationmeta.idcharXposX position in pixels (2)pixpos.cartesian.x;instr.detfloatYposY position in pixels (2)pixpos.cartesian.y;instr.detfloatRA2000Right ascension (2000) - hourspos.eq.ra;meta.mainDE2000Declination (2000) - degreespos.eq.dec;meta.mainVmag? V magnitudemagphot.mag;em.opt.Vfloatnullablen_VmagComments for V magnitude (3)meta.notecharB-V? B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablen_B-VComments for B-V index (3)meta.notecharU-B? U-B colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullablen_U-BComments for U-B index (3)meta.notecharV-I? V-I (Cousins) colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullablen_V-IComments for V-I index (3)meta.notecharJmag? J magnitude (2)magphot.mag;em.IR.Jfloatnullablen_JmagComments for J magnitude (3)meta.notecharHmag? H magnitude (2)magphot.mag;em.IR.Hfloatnullablen_HmagComments for H magnitude (3)meta.notecharKmag? K magnitude (2)magphot.mag;em.IR.Kfloatnullablen_KmagComments for K magnitude (3)meta.notecharJ-K? J-K colour indexmagphot.color;em.IR.J;em.IR.Kfloatnullablen_J-KComments for J-K index (4)meta.notecharMembMembership assignment (5)meta.code.membercharE(B-V)? B-V colour excessmagphot.color.excessfloatnullableE(U-B)? U-B colour excessmagphot.color.excessfloatnullableE(V-I)? V-I colour excessmagphot.color.excessfloatnullableSpTypeMK spectral classificationsrc.spTypecharJ/A+A/407/527/table5Photometric catalogue of the NGC 1663 regionn_KmagComments for K magnitude (3)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq? Identification number (this work) (1)meta.id;meta.mainintnullable2MASSIdentification from 2MASS (<II/246>) cataloguemeta.id.crosscharTYCIdentification from Tycho-2 (<I/259>) cataloguemeta.idcharHD/GSCHD or GSC identificationmeta.idcharXposX position in pixels (2)pixpos.cartesian.x;instr.detfloatYposY position in pixels (2)pixpos.cartesian.y;instr.detfloatRA2000Right ascension (2000) - hourspos.eq.ra;meta.mainDE2000Declination (2000) - degreespos.eq.dec;meta.mainVmag? V magnitudemagphot.mag;em.opt.Vfloatnullablen_VmagComments for V magnitude (3)meta.notecharB-V? B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablen_B-VComments for B-V index (3)meta.notecharU-B? U-B colour indexmagphot.color;em.opt.U;em.opt.Bfloatnullablen_U-BComments for U-B index (3)meta.notecharV-I? V-I (Cousins) colour indexmagphot.color;em.opt.V;em.opt.Ifloatnullablen_V-IComments for V-I index (3)meta.notecharJmag? J magnitude (2)magphot.mag;em.IR.Jfloatnullablen_JmagComments for J magnitude (3)meta.notecharHmag? H magnitude (2)magphot.mag;em.IR.Hfloatnullablen_HmagComments for H magnitude (3)meta.notecharKmag? K magnitude (2)magphot.mag;em.IR.KfloatnullableJ-K? J-K colour indexmagphot.color;em.IR.J;em.IR.Kfloatnullablen_J-KComments for J-K index (4)meta.notecharMembMembership assignment (5)meta.code.membercharE(B-V)? B-V colour excessmagphot.color.excessfloatnullableE(U-B)? U-B colour excessmagphot.color.excessfloatnullableE(V-I)? V-I colour excessmagphot.color.excessfloatnullableSpTypeMK spectral classificationsrc.spTypechar