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Fig. 4.

image

Significance distribution for RX J1713.7−3946. The histograms are entry distributions of the significance map shown in Fig. 3, obtained with HAP (grey filled histograms) and ctools (green histograms). The distributions are shown for pixels outside source regions (dashed green, dark grey) and for all pixels (solid green, light grey). The orange line shows a Gaussian distribution with zero mean and unity width.

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