Fig. 3

Goodness of the fit for all the brightest GRBs with known arrival direction (143 out of 200) as a function of the BeppoSAX local azimuth angle φ. Vertical dashed lines at φ = 0°,90°,180°,270° correspond to the axes of GRBM units 2, 3, 4, 1, respectively. Empty squares (filled circles) are the GRBs localised by other experiments (GRBM alone), as reported in F09.
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