Redshift Accuracy Requirements for Future Supernova and Number Count Surveys

  title={Redshift Accuracy Requirements for Future Supernova and Number Count Surveys},
  author={D. Huterer and A. G. Kim and Lawrence Krauss and Tamara Broderick},
  journal={The Astrophysical Journal},
We investigate the redshift accuracy of Type Ia supernova and cluster number count surveys required for the redshift uncertainties not to contribute appreciably to the dark energy parameter error budget. For the Supernova/Acceleration Probe experiment, we find that without the assistance of ground-based measurements individual supernova redshifts would need to be determined to about 0.002 or better, a challenging but feasible requirement for a low-resolution spectrograph. However, we find that… 

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