We present a catalog of galaxy cluster candidates detected in 100 square degrees surveyed with the SPTpol receiver on the South Pole Telescope .
The catalog contains 89 candidates detected with a signal-to-noise ratio greater than 4.6 .
The candidates are selected using the Sunyaev-Zel ’ dovich effect at 95 and 150 GHz .
Using both space- and ground-based optical and infrared telescopes , we have confirmed 81 candidates as galaxy clusters .
We use these follow-up images and archival images to estimate photometric redshifts for 66 galaxy clusters and spectroscopic observations to obtain redshifts for 13 systems .
An additional 2 galaxy clusters are confirmed using the overdensity of near-infrared galaxies only , and are presented without redshifts .
We find that 15 candidates ( 18 % of the total sample ) are at redshift of z \geq 1.0 , with a maximum confirmed redshift of z _ { max } = 1.38 \pm 0.10 .
We expect this catalog to contain every galaxy cluster with M _ { 500 c } > 2.6 \times 10 ^ { 14 } M _ { \odot } h ^ { -1 } _ { 70 } and z > 0.25 in the survey area .
The mass threshold is approximately constant above z = 0.25 , and the complete catalog has a median mass of approximately M _ { 500 c } = 2.7 \times 10 ^ { 14 } M _ { \odot } h ^ { -1 } _ { 70 } .
Compared to previous SPT works , the increased depth of the millimeter-wave data ( 11.2 and 6.5 \mu K-arcmin at 95 and 150 GHz , respectively ) makes it possible to find more galaxy clusters at high redshift and lower mass .