J/A+A/552/A64 Gaia-RVS standards (Soubiran+, 2013)
The catalogue of radial velocity standard stars for Gaia.
I. Pre-launch release.
Soubiran C., Jasniewicz G., Chemin L., Crifo F., Udry S., Hestroffer D.,
Katz D.
<Astron. Astrophys. 552, A64 (2013)>
=2013A&A...552A..64S 2013A&A...552A..64S
ADC_Keywords: Stars, standard ; Radial velocities
Keywords: catalogs - stars: kinematics and dynamics
Abstract:
The Radial Velocity Spectrograph (RVS) on board of Gaia needs to be
calibrated using stable reference stars known in advance. The
catalogue presented here has being built for that purpose. It includes
1420 radial velocity standard star candidates selected on strict
criteria in order to fulfill the Gaia-RVS requirements. The radial
velocities (RV) presented here have been obtained with the echelle
spectrographs ELODIE and SOPHIE on the 1.93-m telescope at
Observatoire de Haute-Provence (OHP), NARVAL on the Telescope Bernard
Lyot at Observatoire du Pic du Midi and CORALIE on the Euler-Swiss
Telescope at La Silla. Data from the OHP and Geneva Observatory
archives have also been retrieved as well as HARPS spectra from the
ESO archive. The RVs have been measured with the same method :
Cross-Correlation Function (CCF) of the echelle spectra with a
numerical mask. We provide for each star a mean radial velocity in the
SOPHIE scale, derived from the combination of velocities measured with
those instruments, after having carefully estimated their differences
of zero-points. In total 10214 radial velocity measurements have been
obtained for the 1420 stars. With a mean time baseline of 6.35 years,
92.9% of the candidates fulfill a target stability criterion of
300m/s. 343 stars are found to be constant at the level of 100m/s over
10 years. Comparisons with the catalogues of Nidever et al. (2002,
Cat. J/ApJS/141/503) and Chubak et al. (2012, 1207.6212) show an
excellent agreement for FGK stars, with zero-point differences lower
than 100m/s and a remarkably low RMS scatter of 33m/s in the case of
Nidever et al. (2002, Cat. J/ApJS/141/503), suggesting that the
precision of the catalogue presented here is better than this value.
This catalog will likely be useful for other large-scale spectroscopic
surveys such as APOGEE, Gaia-ESO, HERMES and LAMOST.
Description:
Individual and combined radial velocity measurements are presented for
the 1420 standard star candidates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 123 1420 Mean radial velocities in SOPHIE scale
table3.dat 40 10214 *Original radial velocities
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Note on table3.dat: for all stars of table4 excepted HIP 077772.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [HIP]
5- 10 I6 --- HIP HIP number (Cat. I/311)
14- 15 I2 h RAh Right ascension (ICRS, Epoch=J1991.25)
17- 18 I2 min RAm Right ascension (ICRS, Epoch=J1991.25)
20- 24 F5.2 s RAs Right ascension (ICRS, Epoch=J1991.25)
26 A1 --- DE- Declination sign (ICRS, Epoch=J1991.25)
27- 28 I2 deg DEd Declination (ICRS, Epoch=J1991.25)
30- 31 I2 arcmin DEm Declination (ICRS, Epoch=J1991.25)
33- 36 F4.1 arcsec DEs Declination (ICRS, Epoch=J1991.25)
38- 42 F5.2 mag Vmag Magnitude in Johnson V
44- 49 F6.3 mag B-V Johnson B-V colour index
51- 60 A10 --- SpType MK spectral type
62- 70 A9 --- Cat Catalogue of origin (1)
71- 78 F8.3 km/s RV ?=0 Mean Radial Velocity in SOPHIE scale
81- 87 F7.4 km/s eRV ?=0 Internal error of RV
90- 96 F7.4 km/s sRV ?=0 Standard deviation of RV
100-102 I3 --- N ?=0 Number of RV measurements
105-111 F7.4 km/s e_RV ?=0 Uncertainty of RV
113-117 I5 d Tbase ?=0 Time baseline of the N observations
119-123 I5 d JDm ?=0 Mean Julian Day of observations (JD-2400000)
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Note (1): References as follows:
fa = Famaey et al. (2005, Cat. J/A+A/540/165)
ni = Nidever et al. (2002, Cat. J/ApJS/141/503)
nor = Nordstrom et al. (2004A&A...418..989N 2004A&A...418..989N, Cat. V/117)
IAU_std = IAU standard from Udry et al. (1999ASPC..185..367U 1999ASPC..185..367U)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [HIP]
5- 10 I6 --- HIP HIP number
14 A1 --- Instr First name of instrument (1)
16- 20 I5 d JD Julian Day of observation (JD-2400000)
22- 29 F8.3 km/s RV Radial Velocity
31- 37 F7.4 km/s e_RV Radial Velocity error
39- 40 A2 --- Mask Spectral type of the mask used for the CCF
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Note (1): First name of instrument code as follows:
S = SOPHIE
E = ELODIE
C = CORALIE
N = NARVAL
H = HARPS
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Acknowledgements:
Caroline Soubiran, soubiran(at)obs.u-bordeaux1.fr
History:
* 26-Mar-2013: First on-line version
* 15-Oct-2015: Equinox corrected (ICRS epoch=J1991.25 instead of J2000)
(End) C. Soubiran [Lab. d'Astrophys. Bordeaux], P. Vannier [CDS] 25-Feb-2013