J/AJ/160/151ivo://CDS.VizieR/J/AJ/160/151doi:10.26093/cds/vizier.51600151CDSThorstensen J.R.2021-09-22T07:46:08Z2020-12-01T07:34:16ZCDS support team

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

cds-question@unistra.frvariable-starsvisible-astronomyspectroscopyradial-velocityWe report follow-up observations of five cataclysmic variable candidates from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) published by Hou et al. LAMOSTJ024048.51+195226.9 is the most unusual of the five; an early-M type secondary star contributes strongly to its spectrum, and its spectral and photometric behavior are strikingly reminiscent of the hitherto-unique propeller system AE Aqr. We confirm that a 7.34hr period discovered in the Catalina survey data is orbital. Another object, LAMOSTJ204305.95+341340.6, appears to be a near twin of the novalike variable V795Her, with an orbital period in the so-called 2-3hr "gap." LAMOSTJ035913.61+405035.0 is evidently an eclipsing, weakly outbursting dwarf nova with a 5.48hr period. Our spectrum of LAMOSTJ090150.09+375444.3 is dominated by a late-type secondary and shows weak, narrow Balmer emission moving in phase with the absorption lines, but at lower amplitude; we do not see the HeII {lambda}4686 emission evident in the published discovery spectrum. We again confirm that a period from the Catalina data, in this case 6.80hr, is orbital. LAMOSTJ033940.98+414805.7 yields a radial-velocity period of 3.54hr, and its spectrum appears to be typical of novalike variables in this period range. The spectroscopically selected sample from LAMOST evidently includes some interesting cataclysmic variables that have been unrecognized until now, apparently because of the relatively modest range of their photometric variations.2020AJ....160..151Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/160/151CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/211 : Keck/HIRES Sky Line Atlas (Osterbrock+ 1997)IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)I/337 : Gaia DR1 (Gaia Collaboration, 2016)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/other/IBVS/4431 : Margoni-Stagni variables (Skiff, 1997)J/MNRAS/384/1277 : H{alpha} emission line sources from IPHAS (Witham+, 2008)J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009)J/ApJS/194/28 : The evolution of cataclysmic variables (Knigge+, 2011)J/AJ/142/181 : CVs from SDSS. VIII. The final year (Szkody+, 2011)J/MNRAS/443/3174 : 72 faint CV candidates in CRTS (Breedt+, 2014)J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014)J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)J/AJ/159/43 : Spectro. identified CVs from LAMOST survey. I. (Hou+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/160/151https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/160/151http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/160/151https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/160/151https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/160/151http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/160/151GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/160/151/table1 (List of Objects)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/160/151/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/160/151/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/160/151/table1?GETtext/xml+votable180.050000true40.202212519.874155560.0055555555555555566/602 1633 1685 5107 132451.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/160/151?format=asciiOpticaldefaultJ/AJ/160/151/table2Radial VelocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of objectmeta.id;meta.maincharBJD[58829/58869] Barycentric Julian Date of mid-integration, BJD-2400000dtime.epochdoubleRVela[-267/285]? Radial velocity of absorption lineskm/sphys.veloc;pos.heliocentricintnullablee_RVela[7/70]? Error in absorption velocitykm/sstat.errorintnullableRVele[-292/326]? Radial velocity of H-alpha emission linekm/sphys.veloc;pos.heliocentricintnullablee_RVele[2/35]? Error in emission velocitykm/sstat.errorintnullableJ/AJ/160/151/table1List of ObjectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject identifiermeta.id;meta.maincharprimaryRAJ2000[2/20] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[19/41] Degree of declination (J2000)pos.eq.dec;meta.mainGmag[15.2/17.4] Gaia DR2 mean magnitudemagphot.mag;em.optfloatDist[525/992] Gaia DR2 distance (1)pcpos.distanceinte_Dist[27/94] Error on Dist (1)pcstat.errorintE(g-r)[0.01/0.35] Reddening in Gphot.color.excessfloatGMAG[4.3/8.3] Absolute magnitude in Gmagphys.magAbsfloatNobsNumber of observations for this object (link to table2)meta.numberintnullableRVelInteractive Plotmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar