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July 22, 2013: B-mode polarization detected with SPTpol. The B-mode polarization induced by gravitational lensing is detected in SPTpol data by first creating a template of lensing B modes then cross-correlating this template with the SPTpol B-mode data. The template is created using the measured SPTpol E-mode polarization and an estimate of the lensing potential from Herschel-SPIRE maps of the cosmic infrared background. The plots shows the result of this cross-correlation in black bars (with results from consistency tests as green and orange bars), along with the prediction for this signal using our current best-fit cosmological model as the dashed line. The grey bars are the result of a null test.


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The South Pole Telescope (or SPT) is a telescope deployed at the South Pole that is designed to study the Cosmic Microwave background. Constructed between November 2006 and February 2007, the SPT is the largest telescope ever deployed at the South Pole. This telescope provides astronomers a powerful new tool to explore dark energy, the mysterious phenomena that may be causing the universe to accelerate. We invite you to explore these pages to share in our experiences during the design, construction, and (currently) operation of this powerful telescope.

  NSF The South Pole Telescope is funded through the National Science Foundation Office of Polar Programs.  
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