J/A+A/616/A7 Gaia DR2 radial velocity standard stars catalog (Soubiran+, 2018)
Gaia Data Release 2. The catalogue of radial velocity standard stars.
Soubiran C., Jasniewicz G., Chemin L., Zurbach C., Brouillet N.,
Panuzzo P., Sartoretti P., Katz D., Le Campion J.-F., Marchal O.,
Hestroffer D., Thevenin F., Crifo F., Udry S., Cropper M., Seabroke G.,
Viala Y., Benson K., Blomme R., Jean-antoine-piccolo A., Huckle H.,
Smith M., Baker S.G., Damerdji Y., Dolding C., Fremat Y., Gosset E.,
Guerrier A., Guy L.P., Haigron R., Janssen K., Plum G., Fabre C., Lasne Y.,
Pailler F., Panem C., Riclet F., Royer F., Tauran G., Zwitter T.,
Gueguen A., Turon C.
<Astron. Astrophys., 616, A7 (2018)>
=2018A&A...616A...7S 2018A&A...616A...7S (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Stars, standard ; Radial velocities
Keywords: catalogs - standards - techniques: radial velocities -
stars: kinematics and dynamics
Abstract:
The Radial Velocity Spectrometer (RVS) on board the ESA satellite
mission Gaia has no calibration device. Therefore, the radial velocity
zero point needs to be calibrated with stars that are proved to be
stable at a level of 300m/s during the Gaia observations.
We compiled a dataset of ∼71000 radial velocity measurements from five
high-resolution spectrographs. A catalogue of 4813 stars was built by
combining these individual measurements. The zero point was
established using asteroids.
The resulting catalogue has seven observations per star on average on
a typical time baseline of 6yr, with a median standard deviation of
15m/s. A subset of the most stable stars fulfilling the RVS
requirements was used to establish the radial velocity zero point
provided in Gaia Data Release 2. The stars that were not used for
calibration are used to validate the RVS data.
Description:
The Radial Velocity Spectrometer (RVS) on board of Gaia having no
calibration device, the zero point of radial velocities needs to be
calibrated with stars proved to be stable at the level of 300m/s
during the Gaia observations. A dataset of about 71000 ground-based
radial velocity measurements from five high resolution spectrographs
has been compiled. A catalogue of 4813 stars was built by combining
these individual measurements. The zero point has been established
using asteroids. The resulting catalogue has 7 observations per star
on average on a typical time baseline of 6 years, with a median
standard deviation of 15m/s. A subset of the most stable stars
fulfilling the RVS requirements has been used to establish the zero
point of the radial velocities provided in Gaia DR2. The stars not
used for calibration are used for the RVS data validation.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rvstdcat.dat 270 4813 Mean radial velocities on absolute scale
rvstdmes.dat 76 71225 Original ground-based radial velocity
measurements
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See also:
B/astorb : Orbits of Minor Planets (Bowell+ 2014)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/328 : AllWISE Data Release (Cutri+ 2013)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
J/A+A/616/A12 : Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018)
J/A+A/620/A127 : Cassification of RR Lyrae and Cepheid (Molnar+, 2018)
J/A+A/620/A128 : Gaia DR2 study of Herbig Ae/Be stars (Vioque+, 2018)
Byte-by-byte Description of file: rvstdcat.dat
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Bytes Format Units Label Explanations
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2- 23 A22 --- ID Star ID (HIP, TYC or 2MASS)
25- 32 F8.3 km/s RV [-382.272/339.061] Mean Radial Velocity
35- 41 F7.4 km/s eRV [0.0001/0.2157] Internal error of RV
44- 50 F7.4 km/s s_RV [0/1.6164] Standard deviation of RV
53- 59 F7.4 km/s e_RV [0.0001/0.6374] Uncertainty of RV
61- 65 I5 d Tbase Time baseline of the N observations
67- 71 I5 d JDm Mean Julian Day of observations (JD-2400000)
73- 75 I3 --- N Number of ground-based radial velocities
79- 97 I19 --- Source ?=0 Source ID in Gaia DR2
99-102 A4 --- Flag Calibration or validation status (1)
104-110 F7.2 km/s RVS [-382.02/339.66]?=-999.99 Gaia DR2
Radial Velocity
112-116 F5.2 km/s e_RVS [0.11/19.07]?=-9.99 Gaia DR2
Radial Velocity error
118-120 I3 --- o_RVS [0/92] Number of RVS transits
122-143 A22 --- 2MASS ? 2MASS ID (2MASSJHHMMSSss+DDMMSSS)
145-151 F7.3 mag Jmag ?=-9.999 2MASS J magnitude
153-159 F7.3 mag Hmag ?=-9.999 2MASS H magnitude
161-167 F7.3 mag Kmag ?=-9.999 2MASS K magnitude
169-175 F7.3 mag e_Jmag ?=-9.999 2MASS J magnitude error
177-183 F7.3 mag e_Hmag ?=-9.999 2MASS H magnitude error
185-191 F7.3 mag e_Kmag ?=-9.999 2MASS K magnitude error
193-195 A3 --- Qflag 2MASS Qflag
199-208 F10.6 deg RAdeg Right ascension (ICRS) (2)
211-219 F9.5 deg DEdeg Declination (ICRS) (2)
221 A1 --- --- [J]
222-227 F6.1 yr Epoch Epoch for RAdeg and DEdeg
229-233 F5.2 mag Bmag ? Simbad B magnitude
235-239 F5.2 mag Vmag ? Simbad V magnitude
241-255 A15 --- SpType ? Simbad spectral type
257-270 A14 --- otype Simbad object type
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Note (1): Flag as follows:
CAL1 = calibrator for DR2 and DR3
CAL2 = calibrator for DR2 not for DR3
CAL3 = calibrator for DR3 not for DR2
VAL = validation star
Note (2): RA and DEC come from Gaia DR2 (ICRS, Epoch=J2015.5) when available
(source_id>0) or from Simbad (ICRS, Epoch=J2000.0).
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Byte-by-byte Description of file: rvstdmes.dat
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Bytes Format Units Label Explanations
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2- 23 A22 --- ID Star ID (HIP, TYC or 2MASS)
25 A1 --- Instr Instrument (1)
27- 31 I5 d JD Julian Day of observation (JD-2400000)
33- 40 F8.3 km/s RV Radial Velocity
42- 48 F7.4 km/s e_RV Radial Velocity error
50- 51 A2 --- Mask Spectral type of the mask used for the CCF (2)
53- 76 A24 --- Idspec ? Identification number in public archive (3)
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Note (1): Instrument code as follows:
S = SOPHIE
E = ELODIE
C = CORALIE
N = NARVAL
H = HARPS
Note (2): Mask is unknown when the measurement comes from the AMBRE-HARPS
catalogue (de Pascale et al., 2014A&A...570A..68D 2014A&A...570A..68D)
Note (3): Internal sequence number in SOPHIE archive (seq), or running number
(immanum) and dataset in ELODIE archive, or original file name
(ORIGFILE) in ESO-HARPS archive.
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Acknowledgements:
Caroline Soubiran, caroline.soubiran(at)u-bordeaux.fr,
[Lab. d'Astrophys. Bordeaux]
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(End) Patricia Vannier [CDS] 02-Aug-2019