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  • 2206.01620v1

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Euclid preparation: XX. The Complete Calibration of the Color-Redshift Relation survey: LBT observations and data release

Research output: Working paperPreprint

  • Euclid Collaboration
Publication date3/06/2022
<mark>Original language</mark>English


The Complete Calibration of the Color-Redshift Relation survey (C3R2) is a spectroscopic programme designed to empirically calibrate the galaxy color-redshift relation to the Euclid depth (I_E=24.5), a key ingredient for the success of Stage IV dark energy projects based on weak lensing cosmology. A spectroscopic calibration sample as representative as possible of the galaxies in the Euclid weak lensing sample is being collected, selecting galaxies from a self-organizing map (SOM) representation of the galaxy color space. Here, we present the results of a near-infrared H- and K-bands spectroscopic campaign carried out using the LUCI instruments at the LBT. For a total of 251 galaxies, we present new highly-reliable redshifts in the 1.3

Bibliographic note

Accepted for publication in A&A