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Interfacing CSWG and OU-SIM

The CSWG provides galaxy catalogues and weak-lensing maps to the EUCLID collaboration, aiming for galaxy catalogues with full 3D gravitational potential. Consistency is key, with centralized cosmological parameters. OU-SIM interfaces with CSWG to ensure data coherence through a shared database. Various data types, including galaxy catalogues and matter distribution, are provided to OU-SIM. Access to the EUCLID parameter database helps maintain uniformity throughout. Key data types from CSWG include halo catalogues, galaxy properties data, and weak-lensing information. CSWG delivers luminosity functions, galaxy catalogues with spectra, and shapes to OU-SIM, enabling simulations and instrument effects.

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Interfacing CSWG and OU-SIM

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  1. Interfacing CSWG and OU-SIM Romain Teyssier

  2. CSWG and OU-SIM interface • The role of the CSWG is to provide both data and applications to the EUCLID collaboration, and to OU-SIM in particular. • 2 types of data: • Galaxy catalogues with spectral properties • Weak-lensing maps • Ultimate goal: galaxy catalogues with the full corresponding 3D gravitational potential information for ray-tracing • We need to design a whole hierarchy of data sets, from very simple (analytical LF) to very elaborate (very large N-body data) that are consistent with each other. • Consistency will be achieved only if a unique well-defined sources provides the model data and applications: this source is CSWG

  3. CSWG and OU-SIM interface • Data types to be provided to OU-SIM: • Unlensed galaxy catalogues (sky coordinates and redshifts) with full spectral and shape information • Matter distribution (gravitational potential) in spherical shells (onion rings) from N-body simulations • Lensed galaxy catalogues • Stripped down galaxy catalogues • Shear map (non-linear or Gaussian field) • Analytical LF with Monte-Carlo realization • Models of foregrounds : local universe constraints, external galaxy/cluster catalog, Milky Way, stars ? • These various datasets have to be consistent with each other. We need a common source (CSWG) and a common reference of cosmological parameters.

  4. CSWG and OU-SIM interface • CSWG will provide data and applications with a well-documented origin. These data will depend on a unique set of cosmological parameters. • It has been suggested that this set of cosmological parameters should be centralized with the EUCLID collaboration in a dedicated database coordinated by ESA [John Hoar]: the EUCLID parameter database for the universe description. • 3 main types of parameters have been discussed: • Cosmological parameters • Galaxy formation parameters • Galaxy properties parameters • When using our tools and data sets, OU-SIM will access this database to ensure consistency throughout the EUCLID collaboration.

  5. CSWG and OU-SIM interface • Presentation of the most important data types from CSWG. • Halo and sub-halo catalogues [A. Knebe] • Galaxy catalogues and properties [C. Baugh] • Weak-lensing data [K. Benabed] • Type and size of dataset to be presented and discussed. • In order to interface properly with OU-SIM, we also need feedback from OU-SIM about the required simulations. Using detailed examples, we need to break-down our activity into a list of products that CSWG will provide to OU-SIM.

  6. CSWG and OU-SIM interface CSWG Luminosity function versus z Galaxy catalogue with redshift Galaxy catalogue with spectra Galaxy catalogue with shapes and spectra OU-SIM Draw random catalogue Add spectra Add shapes PSF and spectral response Simulated images with spectra and instrumental effects

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