J/AJ/156/231ivo://CDS.VizieR/J/AJ/156/231doi:10.26093/cds/vizier.51560231CDSWeil K.E.Thorstensen J.R.Haberl F.2019-05-07T07:23:31Z2019-04-25T14:44:14ZCDS support team

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

cds-question@unistra.frcataclysmic-variable-starsvariable-starsradial-velocityinfrared-photometryvisible-astronomysloan-photometryWe report observations of the known cataclysmic variable star (CV) V704 And, and also confirm that the optical counterpart of the ROSAT Galactic Plane Survey source RX J2338+431 is a heretofore-neglected CV. Photometric and spectroscopic observations from MDM Observatory show both systems to be nova-like variables that exhibit dips of 4-5 mag from their mean brightnesses, establishing them as members of the VY Scl subclass. From high-state emission-line radial velocities, we determine orbital periods of 0.151424(3) days (3.63 hr) for V704 And and 0.130400(1) days (3.13 hr) for RX J2338+431. In V704 And, we find that the H{alpha} emission-line measures cluster into distinct regions on a plot of equivalent width versus full width at half-maximum, which evidently correspond to high, intermediate, and low photometric states. This allows us to assign spectra to photometric states when contemporaneous photometry is not available, an apparently novel method that may be useful in studies of other novalikes. Our low-state spectra of RX J2338+431 show features of an M-type secondary star, from which we estimate a distance of 890+/-200 pc, in good agreement with the Gaia DR2 (Cat. I/345) parallax.2018AJ....156..231Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/156/231CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/110 : Catalog of Cataclysmic Variables (Downes+ 2001)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/PASP/122/1285 : Radial-velocities of 20 cataclysmic var. (Thorstensen+, 2010)J/AJ/146/107 : Velocity curves of 10 cataclysmic binariesJ/AJ/149/128 : Radial velocities of 29 cataclysmic variablesJ/AJ/150/170 : Radial velocities of 7 cataclysmic binaries (Halpern+, 2015)J/AJ/152/226 : Radial velocities of 35 cataclysmic variablesJ/A+A/617/A16 : VY Scl reduced spectra + radial velocitiesJ/AJ/155/247 : Radial velocities of 6 X-ray cataclysmic binarieshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/156/231https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/156/231http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/156/231https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/156/231https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/156/231http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/156/231GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/156/231/table1 (Object properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/156/231/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/156/231/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/156/231/table1?GETtext/xml+votable180.050000true356.23974916743.5228661110.0055555555555555566/13681 136828.650015785639275e-20 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/156/231?format=asciiOpticalInfrareddefaultJ/AJ/156/231/table1Object propertiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar name (V704 And or RX J2338+431)meta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (1)pos.eq.dec;meta.mainJmag[12.892/15.366] 2MASS J band magnitude (Cat. II/246)magphot.mag;em.IR.JfloatHmag[12.714/15.244] 2MASS H band magnitudemagphot.mag;em.IR.HfloatKsmag[12.579/14.824] 2MASS K_s_ band magnitudemagphot.mag;em.IR.Kfloatgmag[16.1]? g band magnitude from SDSS DR12 (Cat. V/147)magphot.mag;em.opt.Bfloatnullablen_gmag[e] Note on gmag (2)meta.notecharu-g[-0.07]? u-g color index from SDSS DR12magphot.color;em.opt.U;em.opt.Bfloatnullablen_u-g[e] Note on u-g (2)meta.notecharg-i[0.08]? g-i color index from SDSS DR12magphot.colorfloatnullablen_g-i[e] Note on g-i (2)meta.notecharr-i[0.09]? r-i color index from SDSS DR12magphot.color;em.opt.R;em.opt.Ifloatnullablen_r-i[e] Note on r-i (2)meta.notechari-z[0.08]? i-z color index from SDSS DR12magphot.color;em.opt.I;em.opt.Ifloatnullablen_i-z[e] Note on i-z (2)meta.notecharCR[0.03/0.06] Count rate from the ROSAT Bright Source Catalog (Voges et al. 1996IAUC.6420....2V)ct/sphot.count;em.X-rayfloate_CR[0.01/0.02] Uncertainty in CRct/sstat.errorfloatPer[0.154124/0.1604] Orbital period in the high state (from Table 5 of this paper)dtime.perioddoubleVPVelocity Plotmeta.ref.urlcharJ/AJ/156/231/table3V704 And radial velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian Date of mid-integration (BJD-2400000)dtime.epochdoubleRV[-176/164] Barycentric radial velocity of H{alpha}km/sphys.veloc;pos.barycenterinte_RV[2/45] Counting-statistics uncertainty in RVkm/sstat.errorintState[HLM] Photometric state (H=high, M=medium, L=low)meta.codecharJ/AJ/156/231/table4RX J2338+431 radial velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian Date of mid-integration (BJD-2400000)dtime.epochdoubleRV[-176/164] Barycentric radial velocity of H{alpha}km/sphys.veloc;pos.barycenterinte_RV[2/45] Counting-statistics uncertainty in RVkm/sstat.errorintState[HLM] Photometric state (H=high, M=medium, L=low)meta.codechar