Theta-squared distributions of MAGIC J2001+439 observed on 2009 November (panel a), energy threshold is E> 100 GeV) between July and September excluding 2010 July 16 (panel b), E> 70 GeV) and on 2010 July 16 (panel c), E> 70 GeV). Crosses represent the event distribution from the source, while the gray histogram the measured background. The signal region is indicated by the vertical dotted line.