A Measurement of the Correlation of Galaxy Surveys with CMB Lensing
  Convergence Maps from the South Pole Telescope
  We compare cosmic microwave background lensing convergence maps derived from
South Pole Telescope (SPT) data with galaxy survey data from the Blanco
Cosmology Survey, the Wide-field Infrared Survey Explorer, and a new large
Spitzer/IRAC field designed to overlap with the SPT survey. Using optical and
infrared catalogs covering between 17 and 68 square degrees of sky, we detect
correlation between the SPT convergence maps and each of the galaxy density
maps at >4 sigma, with zero cross-correlation robustly ruled out in all cases.
The amplitude and shape of the cross-power spectra are in good agreement with
theoretical expectations and the measured galaxy bias is consistent with
previous work. The detections reported here utilize a small fraction of the
full 2500 square degree SPT survey data and serve as both a proof of principle
of the technique and an illustration of the potential of this emerging
cosmological probe.
