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Catalog Service:
Radial velocities of LSI+61 303 and LS 5039

Short name: J/ApJ/698/514
IVOA Identifier: ivo://CDS.VizieR/J/ApJ/698/514
DOI (Digital Object Identifier): 10.26093/cds/vizier.16980514
Publisher: CDS[+][Pub. ID]
More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/698/514
VO Compliance: Level 2: This is a VO-compliant resource.
Status: active
Registered: 2011 Jun 24 14:12:08Z
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Description


LS 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.

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