J/A+A/363/29ivo://CDS.VizieR/J/A+A/363/29doi:10.26093/cds/vizier.33630029CDSAntonello E.Fugazza D.Mantegazza L.Bossi M.Covino S.2012-09-24T07:33:18Z2001-10-04T23:17:51ZCDS support team

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

cds-question@unistra.frvariable-starsphotometryTwo nearby galaxies, IC 1613 and NGC 6822, were observed over four years to detect short period Cepheids and to obtain good light curves for Fourier decomposition. Since the program was carried out with a relatively small telescope, the Dutch 0.9-m at ESO-La Silla, the observations were performed without filter (white light), or Wh-band; the advantage of this technique is that the photon statistics correspond to those of V-band observations of similar exposure time obtained with a 2-m class telescope. In this paper we discuss some properties of Wh photometry and present the results of the observations of Field B in IC 1613 (3.8'x3.8'). A total of 65 images were obtained and the reduction was performed with DAOPHOT. The light curves of 4037 stars were measured, and the analysis using various techniques allowed the detection of 121 variable stars. We detected 51 population I Cepheids, while previously only 12 Cepheids were known in the same field. Most of these have short periods and some are first overtone mode pulsators. The other variable stars include one eclipsing binary, two suspected W Vir stars, 57 irregular and semi-regular red variables, 3 periodic red variables and 6 irregular blue variables.2000A&A...363...29Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/363/29CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/367/759 : Variable stars in IC 1613 (Mantegazza+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/363/29https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/363/29http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/363/29https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/363/29https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/363/29http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/363/29GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/363/29/table8 (Cepheids in Field B of IC 1613)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/363/29/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/363/29/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/363/29/table8?GETtext/xml+votable180.050000true16.19652.07969440.005555555555555556Cone search capability for table J/A+A/363/29/table9 (Other variable stars in Field B of IC 1613)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/363/29/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/363/29/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/363/29/table9?GETtext/xml+votable180.050000true16.22783332.08994440.0055555555555555566/18041https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/363/29?format=asciiOpticaldefaultJ/A+A/363/29/table8Cepheids in Field B of IC 1613recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[AFM2000]Variable name ([AFM2000] VNNNN-B, or [AFM2000] VaNNNN-B in Simbad)meta.id;meta.maincharRA2000Right ascension (2000)pos.eq.ra;meta.mainDE2000Declination (2000)pos.eq.dec;meta.mainPerPerioddtime.periodfloatWhmagWhite light (Wh) mean magnitudemagphot.mag;stat.meanfloatAmpTotal Wh amplitudemagsrc.var.amplitudefloatMode[F12 ?] Probable pulsation mode (1)meta.code;src.varchar_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.decnullableindexedJ/A+A/363/29/table9Other variable stars in Field B of IC 1613recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[AFM2000]Variable name ([AFM2000] VNNNN-B in Simbad)meta.id;meta.maincharRA2000Right ascension (2000)pos.eq.ra;meta.mainDE2000Declination (2000)pos.eq.dec;meta.mainWhmagWhite light (Wh) mean magnitudemagphot.magfloatTPeriod for regular variables or the timescale for the semiregular or irregular onesdtime.perioddoublel_AmpLimit flag on Ampmeta.code.errorcharAmpTotal Wh amplitudemagsrc.var.amplitudefloatVarTypeVariability type (1)meta.notechar_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