Fig. 8
Luminous efficiency over the initial velocity of the events with fits through the data in semi-log space. Blue dots: values of τ. Orange dashed line: equal-weighted least-squares fit (EWLS) applied to the data. Green line: weighted least-squares fit (WLS) applied to the data; the method weights the values by the relative error of the value. Red dotted line: results found by Halliday et al. (1996). Purple dashed-dotted line: results found by Ceplecha & McCrosky (1976).
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