TY - JOUR AU - D. Lazzati AU - Mitchell Begelman BT - The Astrophysical Journal DA - 12/2010 DO - 10.1088/0004-637x/725/1/1137 PY - 2010 SP - 1137 EP - 1145 T2 - The Astrophysical Journal TI - Non-Thermal Emission from the Photospheres of Gamma-Ray Burst Outflows. I. High-Frequency Tails VL - 725 ER -