J/ApJ/698/514ivo://CDS.VizieR/J/ApJ/698/514doi:10.26093/cds/vizier.16980514CDSAragona C.McSwain M.V.Grundstrom E.D.Marsh A.N.Roettenbacher R.M.,Hessler K.M.Boyajian T.S.Ray P.S.2017-07-05T07:00:10Z2011-06-24T14:12:08ZCDS support team

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

cds-question@unistra.frx-ray-binary-starsradial-velocityLS I +61 303 and LS 5039 are two of only a handful of known high-mass X-ray binaries (HMXBs) that exhibit very high energy emission in the MeV-TeV range, and these "{gamma}-ray binaries" are of renewed interest due to the recent launch of the Fermi Gamma-ray Space Telescope. Here we present new radial velocities of both systems based on recent red and blue optical spectra. Both systems have somewhat discrepant orbital solutions available in the literature, and our new measurements result in improved orbital elements and resolve the disagreements. The improved geometry of each orbit will aid in studies of the high-energy emission region near each source.2009ApJ...698..514Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/698/514CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)J/ApJ/656/437 : LS I +61 303 radial velocities and Halpha EW (Grundstrom+,J/A+A/467/585 : Sources detected by ISGRI (Bodaghee+, 2007)J/A+A/455/1165 : Catalogue of Galactic high-mass X-ray binaries (Liu+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/698/514https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/698/514http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/698/514https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/698/514https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/698/514http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/698/514GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/698/514/table1Radial velocity measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (LS I +61 303 or LS 5039)meta.id;meta.maincharHJDHeliocentric Julian Datedtime.epochdoublePhaseOrbital phasetime.phasefloatRVRadial velocitykm/sphys.veloc;pos.heliocentricfloatO-CRadial velocity residualkm/sstat.fit.residualfloatdVISM? Cross correlation velocity shift of the interstellar line at 6613 Angstromskm/sphys.veloc;arith.difffloatnullable