TY - JOUR AU - B. Morsony AU - D. Lazzati AU - Mitchell Begelman BT - The Astrophysical Journal DA - 08/2007 DO - 10.1086/519483 PY - 2007 SP - 569 EP - 598 T2 - The Astrophysical Journal TI - Temporal and Angular Properties of Gamma-Ray Burst Jets Emerging from Massive Stars VL - 665 SN - 0004-637X ER -