March 9, 2017


ESA is responsible for the mission. The EUCLID consortium is in charge of supplying ESA with the instruments and most of the scientific ground segment.

NASA contributes to Euclid through the supply of NISP instrument flight detectors and their read-out electronics.

More precisely, ESA is responsible for:

  • development of the satellite, with an industrial prime contractor
  • development of the Payload Module, with Astrium SAS as prime contractor
  • supply of the VIS instrument CCD detectors (under contract with E2V)
  • development of the ground operations segment (MOC and SOC)
  • launch and satellite operations
  • archiving of science products and their distribution to the scientific community

The Euclid Science Team (EST), set up by ESA, is in charge of planning observation sequences and monitoring scientific performance.

The EUCLID consortium is in charge of:

  • delivery to ESA of the NISP and VIS instruments (for integration on the payload module by Astrium)
  • development of the SGS and its operations, as well as delivery of science products to ESA. Notably, it is developing the required algorithms (Organization Units: OU) with the help of Science Working Groups (SWG) and the corresponding software as well as the required computing infrastructures (SDC).

EUCLID Consortium

The EUCLID consortium comprises about 1,100 members from more than 110 European and U.S. laboratories and institutes. It is directed by the Euclid Consortium Board (ECB), chaired by Yannick Mellier, from the IAP (Institut d'Astrophysique de Paris).

The countries contributing to the EUCLID consortium and ESA committed to their respective deliverables through a multi-lateral agreement (MLA). The space agencies, which signed the MLA, are responsible for their country's contributions. A Steering Committee set up at agency level monitors progress of the project and ensures implementation of the MLA.

EUCLID Consortium

Organization of the consortium

Inside the consortium:

  • The Mullard Space Science Laboratory (MSSL, UK) is responsible for developing the VIS instrument
  • The Laboratoire d'Astrophysique de Marseille (LAM, Fr) is in charge of developing the NISP instrument
  • The Instituto Nazionale d'AstroFisica (INAF, Italy) is coordinating development of the SGS

These responsibilities rely on multiple contributions from other member countries of the consortium.

French contribution

France is contributing doubly to the EUCLID mission, on the one hand through its contribution to  ESA's mandatory scientific programme, and on the other hand through its participation in the EUCLID consortium.

In addition to Yannick Mellier's role as EC Lead and LAM's role in charge of developing the NISP instrument:

  • Commissariat à l'Energie Atomique (CEA) is suppling the focal plane and the PMCU for the VIS instrument, as well as the cryomechanisms for the NISP instrument
  • Institut d'Astrophysique Spatiale is suppling the calibration unit for the VIS instrument
  • Centre de Physique des Particules de Marseille and the Institut de Physique Nucléaire de Lyon are developing the focal plane of the NISP instrument and characterizing its detectors
  • Centre de Calcul de l'Institut National de Physique Nucléaire et de Physique des Particules is suppling the French Science Data Centre (SDC)
  • The above laboratories and several others (see list below) are developing the numerous algorithms that will be installed at the French SDC
  • The Centre Spatial de Toulouse (CNES CST) is responsible for system engineering, is deputy chair of the SGS development and is overseeing development of the French SDC.

In addition to its contribution to the consortium, CNES is responsible for the French deliverables, funding, and is providing coordination and technical support to the French laboratories, in close cooperation with its national partners. It represents France on the Euclid Steering Committee.

The French laboratories participating in the Euclid consortium are:

  • Astrophysique Instrumentation et Modélisation (Paris Diderot University/CEA-Irfu/CNRS)
  • AstroParticules et Cosmologie (Paris Diderot University/CNRS/CEA/Observatoire de Paris)
  • Centre de Calcul de l'Institut National de Physique Nucléaire et de Physique des Particules (CNRS)
  • Centre de Physique des Particules de Marseille (Aix-Marseille University/CNRS)
  • Institut d'Astrophysique de Paris (Pierre et Marie Curie University/CNRS)
  • Institut d'Astrophysique Spatiale (Paris-Sud University/CNRS)
  • Institut de Physique Nucléaire de Lyon (Claude Bernard Lyon 1 University/CNRS)
  • Institut de Physique Théorique (CEA/Saclay)
  • Institut de Recherche en Astrophysique et Planétologie (Toulouse 3 - Paul Sabatier University/CNRS)
  • Laboratoire d'Astrophysique de Marseille (Aix-Marseille University/CNRS)
  • Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (Observatoire de Paris)
  • Laboratoire Lagrange (Observatoire de la Côte d'Azur/CNRS/Nice Sophia Antipolis University)
  • Laboratoire Univers et Théorie (Observatoire de Paris)