J/AJ/150/134ivo://CDS.VizieR/J/AJ/150/134doi:10.26093/cds/vizier.51500134CDSTwarog B.A.Anthony-Twarog B.J.Deliyannis C.P.Thomas D.T.2021-09-26T12:44:21Z2016-04-11T13:54:38ZCDS support team

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

cds-question@unistra.fropen-star-clustersccd-photometryvisible-astronomymedium-band-photometryPrecision uvbyCaH{beta} photometry of the nearby old open cluster, NGC752, is presented. The mosaic of CCD fields covers an area ~42' on a side with internal precision at the 0.005-0.010mag level for the majority of stars down to V~15. The CCD photometry is tied to the standard system using an extensive set of published photoelectric observations adopted as secondary standards within the cluster. Multicolor indices are used to eliminate as nonmembers a large fraction of the low probability proper-motion members near the faint end of the main sequence, while identifying 24 potential dwarf members between V=15.0 and 16.5, eight of which have been noted before from Vilnius photometry. From 68 highly probable F dwarf members, we derive a reddening estimate of E(b-y)=0.025+/-0.003 (E(B-V)=0.034+/-0.004), where the error includes the internal photometric uncertainty and the systematic error arising from the choice of the standard (b-y,H{beta}) relation. With reddening fixed, [Fe/H] is derived from the F dwarf members using both m_1_ and hk, leading to [Fe/H]=-0.071+/-0.014(sem) and -0.017+/-0.008(sem), respectively. Taking the internal precision and possible systematics in the standard relations into account, [Fe/H] for NGC 752 becomes -0.03+/-0.02. With the reddening and metallicity defined, we use the Victoria-Regina isochrones on the Stromgren system and find an excellent match for (m-M)=8.30+/-0.05 and an age of 1.45+/-0.05Gyr at the appropriate metallicity.2015AJ....150..134Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/150/134CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/259 : The Tycho-2 Catalogue (Hog+ 2000)II/215 : uvby-beta Catalogue (Hauck+ 1997)J/MNRAS/446/3562 : Abundances of red giants in NGC752 (Bocek Topcu+, 2015)J/AJ/148/51 : WOCS. LXI. NGC 6819 photometry (Anthony-Twarog+, 2014)J/AJ/142/127 : NGC 5822 UBVI and uvbyCaH{beta} photometry (Carraro+, 2011)J/BaltA/20/27 : NGC 752 Vilnius photometry (Bartasiute+, 2011)J/BaltA/19/35 : NGC 752 Vilnius photometry (Zdanavicius+, 2010)J/ApJS/176/262 : VRI phot. and theta values in open clusters (Taylor+, 2008)J/AJ/127/1000 : Stromgren and Ca photometry of NGC3680 (Anthony-Twarog+, 2004)J/AJ/119/2282 : Stromgren photometry of IC 4651 (Anthony-Twarog+, 2000)J/A+A/339/423 : Velocities of red giants in NGC 752 (Mermilliod+ 1998)J/PASP/106/281 : Photometry and radial velocities in NGC752 (Daniel+, 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/150/134https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/150/134http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/150/134https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/150/134https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/150/134http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/150/134GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/150/134/table4 (Photometry in NGC 752)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/150/134/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/150/134/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/150/134/table4?GETtext/xml+votable180.050000true29.42794537.669530.0055555555555555566/20446 20468-20469https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/150/134?format=asciiOpticaldefaultJ/AJ/150/134/table4Photometry in NGC 752recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension in decimal hours (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainVmag[7.1/18] The V band magnitudemagphot.mag;em.opt.Vfloate_Vmag[0/0.05] Uncertainty in Vmagmagstat.error;phot.magfloatb-y[0.01/1.2] The Stromgren (b-y) color indexmagphot.color;em.opt.B;em.opt.Vfloate_b-y[0.001/0.07] Uncertainty in b-ymagstat.error;phot.color;em.opt.Bfloatm1[-0.1/0.85]? The Stromgren metallicity index m_1_=(v-b)-(b-y)magphot.colorfloatnullablee_m1? Uncertainty in m1magstat.errorfloatnullablec1[-0.22/1.12]? The Stromgren discontinuity index c_1_=(u-v)-(v-b)magphot.colorfloatnullablee_c1? Uncertainty in c1magstat.errorfloatnullablehk[0.16/2.1]? The Stromgren hk indexmagphot.colorfloatnullablee_hk? Uncertainty in hkmagstat.errorfloatnullableHb[2.38/9.84]? The H{beta} indexmagphot.color;em.opt.B;em.line.Hbetafloatnullablee_Hb? Uncertainty in Hbmagstat.errorfloatnullableNy[2/65] Number of y filter observationsmeta.numberintNb[2/66] Number of b filter observationsmeta.numberintNv[0/50] Number of v filter observationsmeta.numberintNu[0/51] Number of u filter observationsmeta.numberintNCa[0/64] Number of Ca filter observationsmeta.numberintNn[0/38] Number of H{beta} narrow filter observationsmeta.numberintNw[0/39] Number of H{beta} wide filter observationsmeta.numberintWEBDA[0/7699] Identification in WEBDA (http://www.univie.ac.at/webda)meta.idintP91[0/1229] Identification, Platais (1991A&AS...87...69P)meta.idintH26[0/395] Identification, Heinemann (1926AN....227..193H)meta.idintRV61[0/410] Identification, Rohlfs & Vanysek 1961 (Astr. Abh. Hambourg Vol. No. 7)meta.idintS85[0/410] Identification in Stock (1985RMxAA..11..103S)meta.idintMm[-1/99] Membership probability from Platais (1991A&AS...87...69P) (1)%stat.fit.goodnessintClassCalibration equation class (B, D, or G) (2)meta.code.classchar