- Omori, Y
- Chown, R
- Simard, G
- Story, KT
- Aylor, K
- Baxter, EJ
- Benson, BA
- Bleem, LE
- Carlstrom, JE
- Chang, CL
- Cho, HM
- Crawford, TM
- Crites, AT
- Haan, TD
- Dobbs, MA
- Everett, WB
- George, EM
- Halverson, NW
- Harrington, NL
- Holder, GP
- Hou, Z
- Holzapfel, WL
- Hrubes, JD
- Knox, L
- Lee, AT
- Leitch, EM
- Luong-Van, D
- Manzotti, A
- Marrone, DP
- McMahon, JJ
- Meyer, SS
- Mocanu, LM
- Mohr, JJ
- Natoli, T
- Padin, S
- Pryke, C
- Reichardt, CL
- Ruhl, JE
- Sayre, JT
- Schaffer, KK
- Shirokoff, E
- Staniszewski, Z
- Stark, AA
- Vanderlinde, K
- Vieira, JD
- Williamson, R
- Zahn, O
- et al.
© 2017. The American Astronomical Society. All rights reserved. We present a cosmic microwave background (CMB) lensing map produced from a linear combination of South Pole Telescope (SPT) and Planck temperature data. The 150 GHz temperature data from the 2500 deg2 SPT-SZ survey is combined with the Planck 143 GHz data in harmonic space to obtain a temperature map that has a broader ℓ coverage and less noise than either individual map. Using a quadratic estimator technique on this combined temperature map, we produce a map of the gravitational lensing potential projected along the line of sight. We measure the auto-spectrum of the lensing potential CLφφ, and compare it to the theoretical prediction for a ΛCDM cosmology consistent with the Planck 2015 data set, finding a best-fit amplitude of 0.95-0.06+0.06(stat.)0.01+0.01(sys.). The null hypothesis of no lensing is rejected at a significance of 24σ. One important use of such a lensing potential map is in cross-correlations with other dark matter tracers. We demonstrate this cross-correlation in practice by calculating the cross-spectrum, CLφG, between the SPT+Planck lensing map and Wide-field Infrared Survey Explorer (WISE) galaxies. We fit CLφG to a power law of the form PL = a(L/L0)-b with a, L 0, and b fixed, and find ηφG = CLφG/PL = 0.94-0.04+0.04, which is marginally lower, but in good agreement with ηφG = 1.00-0.01+0.02, the best-fit amplitude for the cross-correlation of Planck-2015 CMB lensing and WISE galaxies over ∼67% of the sky. The lensing potential map presented here will be used for cross-correlation studies with the Dark Energy Survey, whose footprint nearly completely covers the SPT 2500 deg2 field.