Fig. 1
θ2 distributions of the NGC 1275 signal and background estimation from 39.0 h of MAGIC stereo observations taken between October 2009 and February 2010, in soft-trigger stereo mode (see 2.1) with an energy threshold of 100 GeV. The region between zero and the vertical dashed line (at 0.026 degrees2) represents the signal region.
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