Gilles Orban de Xivry

Astronomer, Researcher, and Instrumentation Engineer

portrait_GOX.jpg

B5C +2/13 PSILab

Quartier Agora

Allée du six Août 19c

4000 Liège

Belgium

I am a research staff at PSILab within the STAR institute at the University of Liège, specializing in astronomical instrumentation, adaptive optics (AO), and high-contrast imaging (HCI) for the direct detection and characterization of exoplanets.

Over the past 15 years, I have contributed to major projects, including

  • ELT/METIS: Leading the development of non-common path aberration control strategies and serving as the local project manager for ULiège. My work spans all aspects of METIS’ high-contrast imaging modes, from component development and end-to-end HCI simulations, to upcoming performance testing.
  • VLT/ERIS: Technical lead for the focal plane coronagraphs (vortex phase masks in L- and M-bands) and supporting scientific exploitation.
  • SALTO: responsible for the development of the AO instrument, a robust laser-guided AO demonstrator for astronomy, space debris tracking, and optical telecommunications.
  • LBT/ARGOS: Development and on-sky commissioning of the laser-guided ground-layer AO system, including wavefront sensor design and integration.

My research combines theoretical modeling, experimental validation, and on-sky deployment, with a strong emphasis on focal plane wavefront sensing, using various deep learning techniques. I also have a background in extragalactic astronomy, studying the co-evolution of supermassive black holes and their host galaxies using near-infrared integral field spectroscopy.

I hold a PhD in Astronomy from the Max Planck Institute for Extraterrestrial Physics (2014). Since 2024, I have been appointed as a permanent researcher at ULiège, where I focus on high-contrast imaging and contribute to the development of next-generation instruments like ELT/METIS.

For my curriculum vitae, click here (last update: July 2025).

news

Feb 02, 2026 Participating to the Spirit Of Lyot conference in Pasadena
Dec 15, 2025 Our SALTO adaptive optics module is coming back from Redu Space Center to our lab at ULiege.
Nov 07, 2025 The EXOSHARE proposal has been submitted to the European Research Infrastructure 2025 call
Sep 23, 2025 Welcome to Patricia Van de Walle Suárez, joining PSILab as a PhD student.
Aug 28, 2025 My professional webpage is finally up.

selected publications

  1. The VLT/ERIS vortex coronagraph: design, pointing control, and on-sky performance
    G. Orban de Xivry, O. Absil, R. J. De Rosa, and 14 more authors
    In Adaptive Optics Systems IX, Aug 2024
  2. A deep learning approach for focal-plane wavefront sensing using vortex phase diversity
    M. Quesnel, G. Orban de Xivry, G. Louppe, and 1 more author
    \aap, Dec 2022
  3. Status of the SALTO demonstrator: project overview and first on-sky operations
    G. Orban de Xivry, J. Paul, O. Absil, and 16 more authors
    In Adaptive Optics Systems VIII, Aug 2022
  4. Focal plane wavefront sensing using machine learning: performance of convolutional neural networks compared to fundamental limits
    G. Orban de Xivry, M. Quesnel, P.-O. Vanberg, and 2 more authors
    \mnras, Aug 2021