case western reserve university



The Dark Energy Survey

James Annis (Fermilab)

The Dark Energy Survey will be a 5000 sq-degree survey of the South Galactic Cap using 5 optical bands and reaching about i=24. The construction of the new 62 CCD camera DECam is proceeding and first light on the Blanco 4m is scheduled for Oct 2011. We'll use the survey data to make a high precision measurement of w using 4 different probes: SN, photometric BAO, WL power spectrum, and cluster counts. The DES approach to cluster count cosmology will be described in some detail.