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Portuguese VLTI Expertise Centre

Mar. 01, 2021

As part of the ORP H2020 project, a network of VLTI Expertise Centres is established. These centres will be the backbone of dissemination activities to new VLTI users, by organising observing preparation and data reduction schools, co-organising with ESO the VLTI community days, and being the end-points of the Fizeau exchange programme. The centres will follow at a smaller scale the successful experience of the ALMA Regional Centres. Together with ESO, they will be the visible first contact point for astronomers interested in using VLTI.

The VLTI and its instrumentation

The Very Large Telescope Interferometer is a globally unparalleled infrastructure, which provides European astronomers with access to observations at milliarcsecond angular resolution, at low, intermediate and high spectral resolution, at near-infrared and infrared wavelengths.

The currently available VLTI instruments are:

GRAVITY – 4-way beam combiner in the K-band, with spectroscopic, fringe tracking and astrometric capabilities.

PIONIER – 4-way beam combiner in the H-band, on the VLTI visitor focus.

MATISSE – future 4-way beam combiner in the L, M and N infrared bands.

Portuguese VLTI Expertise Centre

The Portuguese centre appears as an evolution of long-standing expertise in optical interferometry that had its beginnings in the astrophysical exploitation of the VINCI and AMBER VLTI instruments. CENTRA is a member of the GRAVITY and GRAVITY+ instrument consortiums and is coordinating the European Interferometry Initiative networking activity since FP7. 


The aims of the Portuguese VLTI Expertise Centre are:

• Integrate and disseminate knowledge being developed across the community, ensuring long-term sustainability;

• Organize schools training users in the VLTI capabilities and instrumentation, providing the practical skills required for VLTI observing, data reduction and use of databases;

• Co-organize (with ESO) VLTI community days and the Eii meetings, bringing together 15 countries, and ESO and ESA, as well as the radio/mm interferometry community;

• Project office for the Fizeau staff exchange grant scheme towards young researchers and VLTI outreach in communities where optical/infrared interferometry is less well developed;

• Exchange experience and coordinate with the radio/mm interferometry community, when possible in conjunction with RadioNet and the Portuguese ALMA Centre of Expertise.


• Support observing proposal preparation and data reduction, model fitting and image reconstruction for GRAVITY.


• The centre offers the reduction of archive data in coordination with ESO. 


Core team

Lead Scientist: Mercedes Filho

Coordination: Paulo J.V. Garcia 


Planned and past activities of the Portuguese VLTI Expertise Centre are:

• 2018/07/09: 9th VLTI Summer School, Lisbon, Portugal

• 2017/07/20: Dissemination action at the XXVII National Meeting of Astronomy and Astrophysics (ENAA)