J/A+AS/120/275ivo://CDS.VizieR/J/A+AS/120/275CDSAlard C.Terzan A.Guibert J.1997-12-09T18:22:22Z1997-12-09T19:22:19ZCDS support team

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

cds-question@unistra.frvariable-starsphotometryGood distance indicators are needed in studies of the galactic structure. Pulsating variables can be used, but the problem is to find a homogeneous sample obeying a period-luminosity relation with low scatter. In this paper, we show how such a sample can be produced using the Terzan catalogue of Variables and available Schmidt plates. We have selected 150 large amplitude variables discovered by Terzan in a field of 25 sq degrees near the Galactic Centre. A set of 22 red plates was scanned with the MAMA machine, providing time series for all the variables. The times series were analysed using both the periodogram and Renson's method. Periods could be derived for 122 stars of the sample showing clearly that most of these objects are Miras. As a conclusion we show that with some infrared photometry, these Miras could be used as good distance indicators in this region.1996A&AS..120..275Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/120/275CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/120/275https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/120/275http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/120/275https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/120/275https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/120/275http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/120/275GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/120/275/table3 (Coordinates, periods and R magnitudes of the Mira variables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/120/275/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/120/275/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/120/275/table3?GETtext/xml+votable180.050000true259.2549583-32.1040.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/120/275?format=asciiOpticaldefaultJ/A+AS/120/275/table3Coordinates, periods and R magnitudes of the Mira variablesTerzanTerzan number (1)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination signpos.eq.dec;meta.mainnullableGLONGalactic longitude lIIdegpos.galactic.lonGLATGalactic latitude bIIdegpos.galactic.latfloatPPerioddtime.periodfloatRmagmaxR magnitude at maximummagphot.mag;em.opt.RfloatRmagminR magnitude at minimum (2)magphot.mag;em.opt.RfloatNoteNotesmeta.notechar