V/140ivo://CDS.VizieR/V/140CDSProsser C.F.Grankin K.N.2017-10-16T14:57:22Z2013-09-30T08:09:02ZCDS support team

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

cds-question@unistra.fropen-star-clustersapparent-magnitudeWe present the results from a photometric monitoring program of primarily solar-type open cluster stars obtained during 1994 and 1995. Several members of the {alpha} Persei cluster have been monitored and the corresponding relation between coronal x-ray activity and rotation period derived. The relation among mid-G/K type members illustrates both the previously noticed downturn in L_X_/L_bol_ at high rotation rates and the sharp decrease in coronal activity at long rotation periods as seen among Pleiades stars. Intensive observation of one slowly rotating G-type member of IC 4665 has enabled a period determination of 8-10 days to be made and illustrates the need for (and limitations of) high quality observations.1997cfa..rept.....Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/V/140CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/80 : Alpha Per Cluster Low-Mass Stars' Membership (Prosser 1992)J/MNRAS/426/3403 : UKIDSS GCS alpha Persei members (Lodieu+, 2012)J/A+A/488/409 : Radial velocities of {alpha} Per stars (Mermilliod+, 2008)J/AJ/131/2967 : {alpha} Persei open cluster members (Makarov+, 2006)J/A+A/395/813 : Alpha Per faint stars photometry (Barrado y Navascues+ 2002)J/AN/319/215 : Alpha Per cluster low-mass members. II. (Prosser+, 1998)J/AN/319/201 : Alpha Per cluster low-mass members. I. (Prosser+, 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=V/140https://vizier.iucaa.in/viz-bin/VizieR-2?-source=V/140http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=V/140https://vizier.cds.unistra.fr/viz-bin/votable?-source=V/140https://vizier.iucaa.in/viz-bin/votable?-source=V/140http://vizieridia.saao.ac.za/viz-bin/votable?-source=V/140GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table V/140/table12 (Observations, periods, ancillary data)https://vizier.cds.unistra.fr/viz-bin/conesearch/V/140/table12?https://vizier.iucaa.in/viz-bin/conesearch/V/140/table12?http://vizieridia.saao.ac.za/viz-bin/conesearch/V/140/table12?GETtext/xml+votable180.050000true49.614083347.35430280.0055555555555555566/3089 3091 3092 3094 3096 3097 3099 3100 3101 3102 3125 3138https://cdsarc.cds.unistra.fr/viz-bin/moc/V/140?format=asciiOpticaldefaultV/140/table12Observations, periods, ancillary datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameShort star namemeta.id;meta.maincharSNameSimbad name of starmeta.idcharVmagV-band magnitudemagphot.mag;em.opt.VfloatB-Vlit? B-V color index from literaturemagphot.color;em.opt.B;em.opt.Vfloatnullablel_VsiniLimit flag on Vsinimeta.code.error;phys.veloc.rotatcharVsini? Projected rotational velocity from literature, or lower limit of Vsini intervalkm/sphys.veloc.rotatintnullablef_Vsini[-] If -, Vsini and B_Vsini are Vsini intervalmeta.codecharB_Vsini? Upper limit on Vsini intervalkm/sphys.veloc.rotat;stat.maxintnullabler_Vsini? Reference for Vsini (1)meta.refcharPhrRotation period in hourshtime.periodfloatProtRotation period in daysdtime.periodfloatu_ProtUncertainty flag on Prot, Protd, and Ampmeta.code.errorcharn_Prot[*] Note on Prot estimation (2)meta.notecharAmpAmplitude (peak-to-trough) of variability, or lower limit of amplitude intervalmagsrc.var.index;stat.minfloatf_Amp[-] If -, Amp and B_Amp are Amplitude intervalmeta.codecharB_Amp? upper limit on amplitude intervalmagsrc.var.amplitude;stat.maxfloatnullablefap[0/1] False-alarm probability of periodogramstat.fit.goodnessdoubleNobsNumber of observationsmeta.numberintObsIdentity of observer(s) (initials of authors)obs.observercharDateObservation date (month and year)time.epoch;obscharDrangeData range within observation (JD-2440000 or JD-2450000)time.intervalcharB-VObserved B-V color index, reddening-correctedmagphot.color;em.opt.B;em.opt.Vfloatn_B-V[a] a: B-V value estimated from V-I color indexmeta.notecharRstarEstimated stellar radius in solar unitssolRadphys.size.radiusfloatSpTypeApproximate MK spectral typesrc.spTypecharVeqEquatorial rotational velocity, derived from Prot and Rstarkm/sphys.veloc.rotatfloatu_VeqUncertainty flag on Veqmeta.code.errorcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main