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J/ApJ/719/890          Keck radial velocities of GJ 876          (Rivera+, 2010)

The Lick-Carnegie Exoplanet Survey: a Uranus-mass fourth planet for GJ 876 in an extrasolar Laplace configuration. Rivera E.J., Laughlin G., Butler R.P., Vogt S.S., Haghighipour N., Meschiari S. <Astrophys. J., 719, 890-899 (2010)> =2010ApJ...719..890R
ADC_Keywords: Stars, double and multiple ; Radial velocities ; Planets Keywords: planetary systems - planets and satellites: general - stars: individual (GJ 876) Abstract: Continued radial velocity (RV) monitoring of the nearby M4V red dwarf star GJ 876 with Keck/High Resolution Echelle Spectrograph has revealed the presence of a Uranus-mass fourth planetary companion in the system. The new planet has a mean period of Pe=126.6 days (over the 12.6-year baseline of the RV observations), and a minimum mass of mesinie=12.9±1.7M{earth}. The detection of the new planet has been enabled by significant improvements to our RV data set for GJ 876. The data have been augmented by 36 new high-precision measurements taken over the past five years. In addition, the precision of all of the Doppler measurements have been significantly improved by the incorporation of a high signal-to-noise template spectrum for GJ 876 into the analysis pipeline. Implementation of the new template spectrum improves the internal rms errors for the velocity measurements taken during 1998-2005 from 4.1m/s to 2.5m/s. Description: We searched for Doppler variability using repeated, high resolution spectra with resolving power R∼70000, obtained with Keck/HIRES. The Keck spectra span the wavelength range from 3700 to 8000Å. Typical signal-to-noise ratios are 100 per pixel for GJ 876. We present results of N-body fits to the radial velocity (RV) data taken at the W. M. Keck telescope from 1997 June to 2010 January. The median of the internal uncertainties is 2.0m/s for the 162 RV measures. Objects: ----------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------- 22 53 16.73 -14 15 49.3 GJ 876 = HIP 113020 ----------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 23 162 Measured velocities for GJ 876 (Keck)
See also: III/254 : 2nd Cat. of Radial Velocities with Astrometric Data (Kharchenko+, 2007) III/213 : General Catalog of mean radial velocities (Barbier-Brossat+, 2000) III/184 : 3rd Bibliog. Cat. of Stellar Radial Vel. (Barbier-Brossat+, 1994) J/A+A/511/A21 : Radial velocities of GJ876 planetary system (Correia+, 2010) J/ApJ/693/1084 : Ten new and updated multiplanet systems (Wright+, 2009) J/ApJ/646/505 : Catalog of nearby exoplanets (Butler+, 2006) J/ApJ/634/625 : Radial velocities and photometry of GJ 876 (Rivera+, 2005) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 F10.5 d BJD Barycentric Julian Date 12- 18 F7.2 m/s RV Radial velocity 20- 23 F4.2 m/s e_RV Uncertainty in RV
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 18-Jun-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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