What is the test for a habeas petition challenging a death penalty decision by a federal court?

The SAP is governed by the Antiterrorism and Effective Death Penalty Act of 1996 (AEDPA), 28 U.S.C. 2241 et seq. Under the AEDPA, a federal court may not grant a habeas petition challenging any matter adjudicated on the merits by a state court unless that decision was: (1) contrary to or involved an unreasonable application of clearly established federal law; or (2) based on an unreasonable determination of the facts given the evidence presented in the state court proceeding. 28 U.S.C. 2254(d); Schriro v. Landrigan, 550 U.S. 465, 473-77 (2007).