References of "Berthier, J"
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See detailDetection of a Stellar Occultation by (87) Sylvia I (Romulus)
Berthier, J.; Frappa, E.; Klotz, A. et al

in Central Bureau Electronic Telegrams (2013)

Report of the successful stellar occultations by the triple minor-planet system (87) Sylvia on Jan. 6.06742 UT of the star HD 244394 (mag 10.8). twelve positive chords of the occultation by the primary ... [more ▼]

Report of the successful stellar occultations by the triple minor-planet system (87) Sylvia on Jan. 6.06742 UT of the star HD 244394 (mag 10.8). twelve positive chords of the occultation by the primary, lasting between 4 s and 26 s, were successfully reported. Observations recorded by 4 teams permitted the detection of a brief (0.5-2 s) stellar occultation at the expected position of the large satellite Romulus. Preliminary analysis of the Romulus chords suggest that the shape of the satellite is extremely elongated or irregular (a/b > 2), with a major axis oriented toward the primary, and an equivalent diameter between 18 and 28 km. [less ▲]

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See detailGaia spectroscopy: processing, performances and scientific returns
Katz, D.; Cropper, M.; Meynadier, F. et al

in EAS Publication Series (2011, February 01)

During the five years of the mission, the Gaia spectrograph, the Radial Velocity Spectrometer (RVS) will repeatedly survey the celestial sphere down to magnitude V ~ 17-18. This talk presents: (i) the ... [more ▼]

During the five years of the mission, the Gaia spectrograph, the Radial Velocity Spectrometer (RVS) will repeatedly survey the celestial sphere down to magnitude V ~ 17-18. This talk presents: (i) the system which is currently developed within the Gaia Data Processing and Analysis Consortium (DPAC) to reduce and calibrate the spectra and to derive the radial and rotational velocities, (ii) the RVS expected performances and (iii) scientific returns. [less ▲]

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