J/AJ/114/699ivo://CDS.VizieR/J/AJ/114/699doi:10.26093/cds/vizier.51140699CDSClampitt L.Burstein D.2023-04-06T16:50:27Z1998-06-03T16:25:28ZCDS support team

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

cds-question@unistra.fropen-star-clustersspectrophotometryvisible-astronomymedium-band-photometrySpectrophotometry is presented for 237 stars in 7 nearby open clusters: Hyades, Pleiades, Alpha Persei, Praesepe, Coma Berenices, IC 4665, and M39. The observations were taken by Lee McDonald and David Burstein using the Wampler single-channel scanner on the Crossley 0.9m telescope at Lick Observatory from 1973 July through 1974 December. Sixteen bandpasses spanning the spectral range 3500-7780{AA} were observed for each star, with bandwidths 32, 48, or 64{AA}. Data are standardized to the Hayes-Latham system to mutual accuracy of 0.016mag per passband. The accuracy of the spectrophotometry is assessed in three ways on a star-by-star basis. First, comparisons are made with previously published spectrophotometry for 19 stars observed in common. Second, (B-V) colors and uvby colors are compared for 236 stars and 221 stars, respectively. Finally, comparisons are made for 200 main sequence stars to the spectral synthesis models of Kurucz, fixing logg=4.0 and [Fe/H]=0.0, and only varying effective temperature. The accuracy of tests using uvby colors and the Kurucz models are shown to track each other closely, yielding an accuracy estimate (1{sigma}) of 0.01mag for the 13 colors formed from bandpasses longward of the Balmer jump, and 0.02mag for the 3 colors formed from the three bandpasses below the Balmer jump. In contrast, larger scatter is found relative to the previously published spectrophotometry of Bohm-Vitense & Johnson (1977ApJS...35..461B) (16 stars in common) and Gunn & Stryker (1983, Cat. <III/88>) (3 stars). We also show that the scatter in the fits of the spectrophotometric colors and the uvby filter colors is a reasonable way to identify the observations of which specific stars are accurate to 1{sigma}, 2{sigma}, .... As such, the residuals from both the filter color fits and the Kurucz model fits are tabulated for each star where it was possible to make a comparison, so users of these data can choose stars according to the accuracy of the data that is appropriate to their needs. The very good agreement between the models and these data verifies the accuracy of these data, and also verifies the usefulness of the Kurucz models to define spectrophotometry for stars in this temperature range (>5000K). These data define accurate spectrophotometry of bright, open cluster stars that can be used as a secondary flux calibration for CCD-based spectrophotometric surveys. (c) 1997 American Astronomical Society.1997AJ....114..699Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/114/699CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/68 : Positions & Proper Motions in alpha Per (Fresneau 1980)I/163 : US Naval Observatory Pleiades Catalog (Van Flandern 1969)J/MNRAS/257/257 : Proper motions in the Hyades (Reid 1992)III/55 : Radial Velocities in Open Clusters (Mermilliod 1979)II/194 : Photometric study of IC 4665 (McCarthy+ 1969)J/AJ/105/1441 : IC 4665 (Prosser 1993)I/203 : NGC 7092 region PM, UBV-phot and SpClass (Platais 1994)J/other/AcASn/32.176 : Stars of Praesepe (Wang+ 1991)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/114/699https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/114/699http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/114/699https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/114/699https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/114/699http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/114/699GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/114/699/table6 (Star-by-star comparison to filter colors and Kurucz models)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/114/699/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/114/699/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/114/699/table6?GETtext/xml+votable180.050000true61.92330315.1630360.0055555555555555565/5884 7120 6/320 337-342 349 351 461 463 472 474 485 496 1024 1032-1033 1035 1042 1060 1727 1768 1770-1771 3093-3095 3100-3101 3136-3138 3144-3145 4687 4698-4699 4720-4721 14057-14059 23405 23416 23423 23489 23493 23497 23501-23503 23513-23515 23518 23523 23525-23527 23533-23535 23544 23546-23548 24110 24194-24195 24198 24201 24207 24218 28092-28094 28131 28137 28142 28437 28439 28469 28484-28486 28489-28490 28494 31785 31787-31788 31790-31791https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/114/699?format=asciiOpticaldefaultJ/AJ/114/699/table4Spectral Energy Distributions for 237 open cluster starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar identification number (1)meta.id;meta.maincharprimaryNightNights observed (2)meta.notechar3500? 3500-5556 color (4)mmagphot.colorintnullableu_3500[:*] indicates larger error in color (3)meta.code.errorchar3571? 3571-5556 color (4)mmagphot.colorintnullableu_3571[:*] indicates larger error in color (3)meta.code.errorchar3636? 3636-5556 color (4)mmagphot.colorintnullableu_3636[:*] indicates larger error in color (3)meta.code.errorchar4036? 4036-5556 color (4)mmagphot.colorintnullableu_4036[:*] indicates larger error in color (3)meta.code.errorchar4167? 4167-5556 color (4)mmagphot.colorintnullableu_4167[:*] indicates larger error in color (3)meta.code.errorchar4255? 4255-5556 color (4)mmagphot.colorintnullableu_4255[:*] indicates larger error in color (3)meta.code.errorchar4400? 4400-5556 color (4)mmagphot.colorintnullableu_4400[:*] indicates larger error in color (3)meta.code.errorchar4565? 4565-5556 color (4)mmagphot.colorintnullableu_4565[:*] indicates larger error in color (3)meta.code.errorchar4785? 4785-5556 color (4)mmagphot.colorintnullableu_4785[:*] indicates larger error in color (3)meta.code.errorchar5000? 5000-5556 color (4)mmagphot.colorintnullableu_5000[:*] indicates larger error in color (3)meta.code.errorchar5263? 5263-5556 color (4)mmagphot.colorintnullableu_5263[:*] indicates larger error in color (3)meta.code.errorchar5840? 5840-5556 color (4)mmagphot.colorintnullableu_5840[:*] indicates larger error in color (3)meta.code.errorchar6300? 6300-5556 color (4)mmagphot.colorintnullableu_6300[:*] indicates larger error in color (3)meta.code.errorchar6710? 6710-5556 color (4)mmagphot.colorintnullableu_6710[:*] indicates larger error in color (3)meta.code.errorchar7100? 7100-5556 color (4)mmagphot.colorintnullableu_7100[:*] indicates larger error in color (3)meta.code.errorchar7400? 7400-5556 color (4)mmagphot.colorintnullableu_7400[:*] indicates larger error in color (3)meta.code.errorcharJ/AJ/114/699/table6Star-by-star comparison to filter colors and Kurucz modelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar identification number (1)meta.id;meta.maincharprimaryHD? HD number of starmeta.idintnullableRA1950Right Ascension 1950 from SIMBADpos.eq.ra;meta.mainDE1950Declination 1950 from SIMBADpos.eq.dec;meta.mainSpSpectral type from SIMBAD (2)src.spTypecharNotesNotes for particular stars (3)meta.notecharVmagApparent V mag from SIMBADmagphot.mag;em.opt.VfloatB-V9.999? Observed B-V color from SIMBADmagphot.color;em.opt.B;em.opt.Vfloatu-b9.999? Observed u-b color from SIMBADmagphot.color;em.opt.U;em.opt.Bfloatv-y9.999? Observed v-y color from SIMBADmagphot.color;em.opt.B;em.opt.Vfloatb-y9.999? Observed b-y color from SIMBADmagphot.color;em.opt.B;em.opt.VfloatdB-V9.999? B-V color diff, US-SIMBAD (4)magphot.color;arith.difffloatdu-b9.999? u-b color diff, US-SIMBAD (4)magphot.color;em.opt.U;em.opt.Bfloatn_du-b[:] Bad u-b color comparision (5)meta.notechardv-y9.999? v-y color diff, US-SIMBAD (4)magphot.color;arith.difffloatn_dv-y[:] Bad v-y color comparision (5)meta.notechardb-y9.999? b-y color diff, US-SIMBAD (4)magphot.color;arith.difffloatn_db-y[:] Bad b-y color comparision (5)meta.notechardkurbl9.999? Kurucz comparison, blue col (6)magphot.mag;arith.difffloatdkurrd9.999? Kurucz comparison, red col (6)magphot.mag;arith.difffloatVabsAbsolute V mag (7)magphys.magAbs;em.opt.Vfloat_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