Mr. Sébastien Bovay Profile

Sébastien Bovay

at Observatoire de Genève

SPIE Involvement:

Author

Publications (3)

Proceedings Article | 29 August 2022 Presentation + Paper

First light of NIRPS, the near-infrared adaptive-optics assisted high resolution spectrograph for the ESO 3.6m

François Wildi, François Bouchy, René Doyon, Nicolas Blind, Ludovic Genolet, Michael Sordet, Alex Segovia, Nolan Grieves, Lison Malo, Étienne Artigau, Jonathan St-Antoine, Philippe Vallée, Jose Luis Rasilla, Felix Gracia Temich, Anne-Sophie Poulin-Girard, Denis Brousseau, Danuta Sosnowska, Vlad Reshetov, Frédérique Baron, Simon Thibault, Sébastien Bovay, Yolanda Frensch, Gaspare Lo Curto, Norbert Hubin, Gérard Zins, Céline Peroux, Alexandre Cabral

Proceedings Volume 12184, 121841H (2022) https://doi.org/10.1117/12.2630016

KEYWORDS: Spectrographs, Adaptive optics, Stars, Telescopes, Planets, Calibration, Temperature metrology, Point spread functions, Spectral resolution, Infrared radiation

Read Abstract +

Proceedings Article | 29 August 2022 Paper

NIRPS front-end: design, performance, and lessons learned

N. Blind, U. Conod, A. de Meideros Martins, F. Wildi, F. Bouchy, S. Bovay, D. Brousseau, A. Cabral, L. Genolet, J. Kolb, R. Schnell, A. Segovia, M. Sordet, S. Thibault, B. Wehbe, G. Zins

Proceedings Volume 12184, 121844H (2022) https://doi.org/10.1117/12.2628321

KEYWORDS: Adaptive optics, Optical fibers, Cameras, Telescopes, Calibration, Stars, Real-time computing, MATLAB, Spectrographs, Planets

Read Abstract +

Proceedings Article | 1 September 2017 Paper

NIRPS: an adaptive-optics assisted radial velocity spectrograph to chase exoplanets around M-stars

F. Wildi, N. Blind, V. Reshetov, O. Hernandez, L. Genolet, U. Conod, M. Sordet, A. Segovilla, J. L. Rasilla, D. Brousseau, S. Thibault, B. Delabre, T. Bandy, M. Sarajlic, A. Cabral, S. Bovay, Ph. Vallée, F. Bouchy, R. Doyon, E. Artigau, F. Pepe, J. Hagelberg, C. Melo, X. Delfosse, P. Figueira, N. C. Santos, J. I. González Hernández, J. R. de Medeiros, R. Rebolo, Ch. Broeg, W. Benz, I. Boisse, L. Malo, U. Käufl, L. Saddlemyer

Proceedings Volume 10400, 1040018 (2017) https://doi.org/10.1117/12.2275660

KEYWORDS: Spectrographs, Adaptive optics, Planets, Exoplanets, Velocity measurements, Stars, Spectroscopy, Optical fibers, Space operations, Interference (communication)

Read Abstract +

Since 1st light in 2002, HARPS has been setting the standard in the exo-planet detection by radial velocity (RV) measurements[1]. Based on this experience, our consortium is developing a high accuracy near-infrared RV spectrograph covering YJH bands to detect and characterize low-mass planets in the habitable zone of M dwarfs. It will allow RV measurements at the 1-m/s level and will look for habitable planets around M- type stars by following up the candidates found by the upcoming space missions TESS, CHEOPS and later PLATO. NIRPS and HARPS, working simultaneously on the ESO 3.6m are bound to become a single powerful high-resolution, high-fidelity spectrograph covering from 0.4 to 1.8 micron. NIRPS will complement HARPS in validating earth-like planets found around G and K-type stars whose signal is at the same order of magnitude than the stellar noise. Because at equal resolving power the overall dimensions of a spectrograph vary linearly with the input beam étendue, spectrograph designed for seeing-limited observations are large and expensive. NIRPS will use a high order adaptive optics system to couple the starlight into a fiber corresponding to 0.4” on the sky as efficiently or better than HARPS or ESPRESSO couple the light 0.9” fiber. This allows the spectrograph to be very compact, more thermally stable and less costly. Using a custom tan(θ)=4 dispersion grating in combination with a start-of-the-art Hawaii4RG detector makes NIRPS very efficient with complete coverage of the YJH bands at 110’000 resolution. NIRPS works in a regime that is in-between the usual multi-mode (MM) where 1000’s of modes propagates in the fiber and the single mode well suited for perfect optical systems. This regime called few-modes regime is prone to modal noise- Results from a significant R and D effort made to characterize and circumvent the modal noise show that this contribution to the performance budget shall not preclude the RV performance to be achieved.

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years