Euclid is an ESA medium class space mission , selected in October 2011 and with its launch planned for 2020. The Euclid mission aims at understanding why the expansion of the Universe is accelerating and the cause for this acceleration which physicists refer to as dark energy. Euclid will explore how the Universe evolved over the past 10 billion years to address questions related to fundamental physics and cosmology on the nature and properties of dark energy, dark matter and gravity. Euclid will also provide insightful information on the physics of the early universe and on the initial conditions which seed the formation of cosmic structure.

The imprints of dark energy and gravity will be tracked by using two complementary cosmological probes to capture signatures of the expansion rate of the Universe and the growth of cosmic structures: Weak gravitational Lensing and Galaxy Clustering (Baryonic Acoustic Oscillations and Redshift Space Distortion). Euclid will be equipped with a 1.2 m diameter mirror telescope feeding 2 instruments: a high quality panoramic visible imager (VIS); and a near infrared 3- filter photometer and a slitless spectrograph (NISP).

Euclid will carry out a wide survey covering 15,000 deg2 and a Deep survey of 40 deg2 in a 6 years mission operating at the L2 Lagrangian point. The scientific analysis and interpretation of the mission data is led by the scientists of the Euclid Consortium.
STM model of the Filter Wheel Assembly being tested.
Aim of our participation

The Institute of Space Sciences (IEEC-CSIC) is deeply involved in the Euclid mission. We form part of the Euclid Science Team of the mission. We are members of the Euclid Consortium Board. We are responsible, together with IFAE, of delivering the Filter Wheel Assembly (FWA) of the Near Infrared Spectrograph and Photometer (NISP). We lead the Simulation Organization Unit and are deputy coordinators of the Photometric Redshift Organization Unit of the Science Ground Segment. We lead the Cosmological Simulations Science Working Group and actively participate as well in other Science Working Groups.
Production of simulated images in OU-SIM for the Scientific Challenge 2 of the Science Ground Segment
Recent developments

In July 2016 we passed the Critical Design Review (CDR) of the FWA subsystem, including the space qualification of the gluing process of the glass filters to the metal mountings. In November 2016, we passed the NISP instrument CDR. ?
Delivery of the STM model of the FWA to LAM, where it was assembled in the NISP STM. All verification tests were passed satisfactorily. In June 2016 we passed the Technical Keypoint 1 review of the Science Ground Segment.

Production and distribution of simulated images in OU-SIM for the Scientific Challenge 1 of the Science Ground Segment and preliminary release of Scientific Challenge 2. During 2016, we have attended many meetings and workshops of the mission, and organized the Cosmological Simulations Working Group Meeting at ICE in November 2016. Approval of an ESO Large Programme, where we are PI, to obtain spectroscopy to calibrate the photometric redshift technique in Euclid.
Slice of one of the weak lensing maps being produced in the Flagship simulation for Euclid
Recent references
Izard, Albert; Crocce, Martin; Fosalba, Pablo, 2016, "ICE-COLA: towards fast and accurate synthetic galaxy catalogues optimizing a quasi-N-body method", MNRAS, 459, 2327

Smith, M., et al, 2016, "DES14X3taz: A Type I Superluminous Supernova Showing a Luminous, Rapidly Cooling Initial Pre-peak Bump", ApJ, 818, L8

Crocce, M., et al, 2016, "Galaxy clustering, photometric redshifts and diagnosis of systematics in the DES Science Verification data", MNRAS, 455, 4301 Giannantonio, T.;

Fosalba, P., et al, 2016, "CMB lensing tomography with the DES Science Verification galaxies", MNRAS, 456, 3213

Senior Institute members involved

F. Castander, M. Crocce, P. Fosalba, E. Gaztañaga
Institute of Space Sciences (IEEC-CSIC)

Campus UAB, Carrer de Can Magrans, s/n
08193 Barcelona.
Phone: +34 93 737 9788
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An institute of the Consejo Superior de Investigaciones Científicas

An institute of the Consejo Superior de Investigaciones Científicas
Affiliated with the Institut d'Estudis Espacials de Catalunya

Affiliated with the Institut d'Estudis Espacials de Catalunya