We measure the cross-power spectrum of the projected mass density as traced by the convergence of the cosmic microwave background lensing field from the South Pole Telescope ( SPT ) and a sample of Type 1 and 2 ( unobscured and obscured ) quasars at \langle z \rangle \sim 1 selected with the Wide-field Infrared Survey Explorer , over 2500 deg ^ { 2 } .
The cross-power spectrum is detected at \approx 7 \sigma , and we measure a linear bias b = 1.61 \pm 0.22 , consistent with clustering analyses .
Using an independent lensing map , derived from Planck observations , to measure the cross-spectrum , we find excellent agreement with the SPT analysis .
The bias of the combined sample of Type 1 and 2 quasars determined in this work is similar to that previously determined for Type 1 quasars alone ; we conclude that obscured and unobscured quasars trace the matter field in a similar way .
This result has implications for our understanding of quasar unification and evolution schemes .