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Fig. 3

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Significance skymap of the sky region around Sw J1644+57 from 27.4 h of MAGIC stereo observations taken between March 31 and April 15 2011, above an energy threshold of 100 GeV. The position of Sw J1644+57 is marked with a white cross. The colours palette indicates the significance values while the point spread function (PSF) of about 0.12° is also displayed.

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