J/AJ/126/3017ivo://CDS.VizieR/J/AJ/126/3017doi:10.26093/cds/vizier.51263017CDSThorstensen J.R.2025-11-27T20:02:07Z2004-11-13T23:02:38ZCDS support team

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

cds-question@unistra.frvariable-starsvisible-astronomytrigonometric-parallaxstellar-distanceThe 2.4m Hiltner Telescope at MDM Observatory was used in an attempt to measure trigonometric parallaxes for 14 cataclysmic variable stars. Techniques are described in detail. In the best cases the parallax uncertainties are below 1mas, and significant parallaxes are found for most of the program stars. A Bayesian method that combines the parallaxes together with proper motions and absolute magnitude constraints is developed and used to derive distance estimates and confidence intervals. The most precise distance derived here is for WZ Sge, for which is found to be 43.3^+1.6^_-1.5_pc. Six Luyten Half-Second stars with previous precise parallax measurements were remeasured to test the techniques, and good agreement was found.2003AJ....126.3017Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/126/3017CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/126/3017https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/126/3017http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/126/3017https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/126/3017https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/126/3017http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/126/3017GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/126/3017/table2 (Positions, Magnitudes, Parallaxes, and Proper Motions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/126/3017/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/126/3017/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/126/3017/table2?GETtext/xml+votable180.050000true318.02375-8.79680560.005555555555555556Cone search capability for table J/AJ/126/3017/table4 (Parallaxes, proper motions, and distances)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/126/3017/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/126/3017/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/126/3017/table4?GETtext/xml+votable180.050000true318.0385481-8.82688330.005555555555555556Cone search capability for table J/AJ/126/3017/table5 (Measured and theoretical absolute magnitudes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/126/3017/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/126/3017/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/126/3017/table5?GETtext/xml+votable180.050000true229.9805558-25.00683750.0055555555555555566/1405 1407 4859 6328 6883 7752 7980 9238-9239 9244-9245 12859 13641 15090 26207 26378 27004-27005 27982 29777 30833 36232 36234 42910 44245 490043.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/126/3017?format=asciiOpticaldefaultJ/AJ/126/3017/table2Positions, Magnitudes, Parallaxes, and Proper MotionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldCataclysmic Variable Star name, as field designation (1)obs.fieldcharf_Field[*] Indicates the program starmeta.codecharRAJ2000Hour of Right Ascension (J2000) (2)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (2)pos.eq.dec;meta.mainWeight[0/1] Reference star indicator (3)meta.codeintsigmaScatter around the best astrometric fit (4)masstat.stdevintVmagThe V band magnitude (5)magphot.mag;em.opt.VfloatV-IThe (V-I) color (5)magphot.color;em.opt.V;em.opt.IfloatplxFitted parallaxmaspos.parallax.trig;meta.modelledfloate_plxError in plxmasstat.error;pos.parallaxfloatpmXX (RA) tangent-plane direction proper motionmas/yrpos.pm;pos.eq.rafloatpmYY (DE) tangent-plane direction proper motionmas/yrpos.pm;pos.eq.decfloatsigpmUncertainty in proper motion (per coordinate)mas/yrstat.error;pos.pmfloatJ/AJ/126/3017/table4Parallaxes, proper motions, and distancesSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharprimaryplxRelative parallaxmaspos.parallax.trigfloate_plxrms uncertainty on plx derived from the goodness of fitmasstat.error;pos.parallaxfloate_plx2rm uncertainty on plx derived from the scatter of the reference starsmasstat.errorfloatPLXAbsolute parallaxmaspos.parallax.trigfloate_PLXrms uncertainty on PLXmasstat.errorfloatdLK? Most probable value of the distance based on absolute parallax and a Lutz-Kelker correctionpcpos.distance;stat.valuefloatnullabled(pi+mu)Bayesian distance estimate considering the parallax and proper motion prior onlypcpos.distance;pos.parallax;pos.heliocentricfloatE_d(pi+mu)Error on d(pi+mu) (upper limit)pcstat.error;stat.maxfloate_d(pi+mu)Error on d(pi+mu) (lower limit)pcstat.errorfloatpmRAProper motion in right ascensionmas/yrpos.pm;pos.eq.rafloatpmDEProper motion in declinationmas/yrpos.pm;pos.eq.decfloate_pmRArms uncertainty on pmRA and pm DEmas/yrstat.error;pos.pm;pos.eq.rafloatmag? Apparent magnitudemagphot.magfloatnullableMAG? Assumed absolute magnitudemagphys.magAbsfloatnullablee_MAG? 1sigma combined uncertainty for mag and MAGmagstat.error;phot.magfloatnullablem-M? Distance modulusmagphot.mag.distModfloatnullablee_m-M? rms uncertainty on m-Mmagstat.errorfloatnullable1/piabsInverse of absolute parallaxmas**-1pos.distance;pos.heliocentricfloatE_1/piabsError on 1/piabs (upper limit)mas**-1stat.error;stat.maxfloate_1/piabsError on 1/piabs (lower limit)mas**-1stat.errorfloatd(pi+mu+m-M)Distance, taking account parallax, proper motion and distance modulus as priorpcpos.distance;pos.parallaxfloatE_d(pi+mu+m-M)Error on distance (upper limit)pcstat.error;stat.maxfloate_d(pi+mu+m-M)Error on distance (lower limit)pcstat.errorfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/AJ/126/3017/table5Measured and theoretical absolute magnitudesStarStar namemeta.id;meta.maincharPorbOrbital periodhtime.periodfloatInclInclinationdegsrc.orbital.inclinationinte_Inclrms uncertainty on Incldegstat.errorintSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVmaxMaximum V magnitudemagphot.mag;em.opt.VfloatVMAGPredicted maximum absolute V magnitudemagphys.magAbsfloatE_VMAGError on VMAG (upper limit)magstat.error;stat.maxfloate_VMAGError on VMAG (lower limit)magstat.errorfloatVMAGmMeasured maximum absolute V magnitudemagphys.magAbsfloatE_VMAGmError on VMAGm (upper limit)magstat.error;stat.maxfloate_VMAGmError on VMAGm (lower limit)magstat.errorfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main