Spectroscopic needs for imaging dark energy experiments
Newman, Jeffrey; Abate, Alexandra; Abdalla, Filipe B.; Allam, Sahar; Allen, Steven; Ansari, R.; Bailey, S.; Barkhouse, Wayne; Beers, Timothy C.; Blanton, Michael; Colless, Matthew; Brodwin, Mark; Hildebrandt, H.
Ongoing and near-future imaging-based dark energy experiments are critically dependent upon photometric redshifts (a.k.a. photo-z's): i.e., estimates of the redshifts of objects based only on flux information obtained through broad filters. Higher-quality, lower-scatter photo-z's will result in smaller random errors on cosmological parameters; while systematic errors in photometric redshift estimates, if not constrained, may dominate all other uncertainties from these experiments. The desired...[Show more]
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