J/ApJ/698/514 Radial velocities of LSI+61 303 and LS 5039 (Aragona+, 2009)
The orbits of the gamma-ray binaries LS I +61 303 and LS 5039.
Aragona C., McSwain M.V., Grundstrom E.D., Marsh A.N., Roettenbacher R.M.,
Hessler K.M., Boyajian T.S., Ray P.S.
<Astrophys. J., 698, 514-518 (2009)>
=2009ApJ...698..514A 2009ApJ...698..514A
ADC_Keywords: Binaries, X-ray ; Radial velocities
Keywords: binaries: spectroscopic - stars: individual (LS 5039, LS I +61 303)
Abstract:
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 "γ-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.
Description:
We obtained 83 spectra,in a wavelength range of 6400-7050Å, of
LS I +61 303 at the KPNO coude feed telescope over 35 consecutive
nights during 2008 October and November.
Spectra of LS 5039 were taken at the CTIO 1.5m telescope between 2007
August and 2008 April in service mode. The observed wavelength region
was about 4050-4700Å.
Objects:
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RA (2000) DE Designation(s)
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02 40 31.7 +61 13 46 LS I +61 303 = V* V615 Cas
18 26 15.1 -14 50 54 LS 5039 = V* V479 Sct
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 49 125 Radial velocity measurements
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See also:
J/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+,
2007)
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)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Star name (LS I +61 303 or LS 5039)
14- 25 F12.4 d HJD Heliocentric Julian Date
27- 31 F5.3 --- Phase Orbital phase
33- 37 F5.1 km/s RV Radial velocity
39- 43 F5.1 km/s O-C Radial velocity residual
45- 49 F5.2 km/s dVISM ? Cross correlation velocity shift of the
interstellar line at 6613 Angstroms
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 03-Jun-2011