Fig. 4
Δχ2 curves as a function of event rate Ṅev in Super-Kamiokande, as obtained from SN1987A data analysis and for two different energy thresholds. The set of thin lines correspond to the present threshold of 19.3 MeV whereas the set with thick lines correspond to Eth = 11.3 MeV. The meaning of the individual lines is as in the previous figures.
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