SPT

South Pole Telescope (SPT)

The South Pole Telescope (SPT) is a ten-meter diameter telescope operating at the National Science Foundation South Pole research station (image above by Daniel Luong-Van). The telescope is designed to conduct large-area millimeter and sub-millimeter wavelength surveys of faint, low-contrast emission, as required to map primary and secondary anisotropies in the cosmic microwave background (CMB). A description of the receivers used on the SPT is given below.


SPT-SZ

From 2008 to 2011, the SPT-SZ receiver carried out a 2500 square-degree survey of the southern sky at high galactic latitude. The instrument had spectral bands centered at 95, 150, and 220 GHz, with 1 arcminute resolution at 150 GHz. Science highlights include:

  • Measurements of primary CMB anisotropy in the TT power spectrum (Story et al. 2013)
  • Measurements of secondary CMB anisotropy - the thermal and kinematic Sunyaev Zel'dovich effects (tSZ and kSZ)
    and foreground anisotropy - the cosmic infrared background (CIB) and radio sources (George et al. 2015)
  • The reconstruction of the CMB lensing potential and its power spectrum (van Engelen et al. 2012)
  • A catalog of tSZ-selected galaxy clusters (Bleem et al 2015) and cosmological constraints (Benson et al. 2013)
  • A catalog of high-redshift, strongly-lensed, star-forming galaxies (Vieira et al. 2013).

SPTpol

Since 2012, the polarization-sensitive SPTpol receiver has carried out two surveys within a 500 square-degree region of the southern sky at high galactic latitudes: first a 100 square-degree survey in 2012 and early 2013, then a 500 square-degree survey. The instrument has spectral bands centered at 95 and 150 GHz, with 1 arcminute resolution at 150 GHz. Science highlights include:

  • The first detection of lensed B-mode polarization using the CIB as a tracer of large-scale structure (Hanson et al. 2013)
  • Measurements of primary CMB anisotropy in the TE and EE power spectra (Crites et al. 2015)
  • The reconstruction of the CMB lensing potential using temperature and polarization information (Story et al. 2015)
  • Direct measurements of lensed B-mode polarization in the BB power spectrum (Keisler et al. 2015).

Further details on SPT may be found at http://pole.uchicago.edu/public/

A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
NASA Official: Dr. Eric R. Switzer
Web Curator: Mr. Michael R. Greason