The Complete Calibration of the Color-Redshift Relation (C3R2) Survey

The Complete Calibration of the Color-Redshift Relation (C3R2) survey is aimed at providing galaxy redshifts needed for weak lensing cosmology experiments of the 2020s. The nights for this data release were allocated as part of a multi-institution effort to solve the redshift calibration problem for Euclid, with time coming from all Keck partners: Caltech (10 nights, PI J. Cohen), NASA (5 nights, PI D. Stern), University of Hawaii (6 nights, PI D. Sanders), and the University of California (2.5 nights, PI B. Mobasher). Refer to the paper: The Complete Calibration of the Color-Redshift Relation (C3R2) Survey: Survey Overview and Data Release 1 Masters et al. 2017 (ApJ 841, 111) and please cite this paper if you make use of the data. Release Date: Mar 28, 2019.

This work was supported by a NASA Key Strategic Mission Support (KSMS) Keck PI Data Award, administered by the NASA Exoplanet Science Institute.    D. Masters, D. Stern, P. Capak, and J. Rhodes acknowledge support by NASA ROSES grant 12-EUCLID12-0004.

Provided in these products are the spectra and redshifts for all successfully targeted C3R2 sources with DEIMOS, LRIS, and MOSFIRE up through DR2 (2017A semester). There are 3976 spectra of 3850 objects; not yet given are separate 1D spectra for the serendipitiously detected sources. The DEIMOS and MOSFIRE products consist of 1D and 2D spectra; LRIS products consist of only 1D extracted spectra, one for each camera used (red and/or blue). Note that the spectra are not flux calibrated. Each FITS file contains the flux (arbitrary units), wavelength (Angstroms), and inverse variance (1/sigma2).

Column Key
Mask: slitmask identifier, See Table 2 in Masters_2017_ApJ_841_111.pdf for Observed Slitmasks
Quality: redshift confidence, See Quality Flag Descriptions

Click on a column header to sort. Click on the 3 bars in the column header to filter.

(Returns all rows if no filters are applied)

 

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This research has made use of the Keck Observatory Archive (KOA), which is operated by the W. M. Keck Observatory and the NASA Exoplanet Science Institute (NExScI), under contract with the National Aeronautics and Space Administration.

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If your research uses data reduced by the DEIMOS DRP or MOSFIRE DRP, please use the PypeIt Citation.

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