Pierre-Emerick Aubameyang's ninth goal in 11 La Liga appearances helped earn Barcelona a win at Real Sociedad that lifted them to second in the table. The former Arsenal striker scored with a header from close range after a cross from former Manchester City player Ferran Torres. Marc-Andre ter Stegen made a save from Alexander Sorloth and Alexander Isak shot wide again. Ousmane Dembele's shot bounced off the post shortly before Aubameyang scored. Relive Barca's Victory at Real Sociedad Real Madrid close to champions After half-time, Barca were forced to try to score, Real Soros pressured and Soros missed two more chances. The game was briefly halted early in the second half after an object was thrown onto the field. Aubameyang, 32, joined Barca on a free transfer in February after failing to play for Arsenal due to a disciplinary breach in December. Only Memphis Depay has scored more goals for Barca in La Liga this season. Barca's victory leaves them second with 63 points, 15 behind leaders Real Madrid. Real Sociedad remain sixth in the table - six points shy of a Champions League spot with five games remaining. Real Madrid need four points from their last five games to secure a 35th La Liga title.