1710.02517
Dark Energy Survey Year 1 results: cross-correlation redshifts in the DES -- calibration of the weak lensing source redshift distributions
Davis, et al
Present the calibration of the DES Y1 WL source galaxy redshift distributions from clustering measurements. By cross-correlating the positions of source galaxies with LRGs selected by the redMaGiC algorithm, measure the z distributions of the source galaxies as placed into different tomographic bins. These measurements constrain any such shifts to an accuracy of ~0.02 and can be computed even when the clustering measurements do not span the full z range. The highest-z source bin is not constrained by the clustering measurements because of the minimal z overlap with the redMaGiC galaxies. Compare the constraints with those obtained from COMOS 30-band survey and find that the 2 very different methods produce consistent constraints.
No comments:
Post a Comment