Fig. 2
Relative decrease of the probability of detection, 
, against PFA when the WMF is applied to a source whose true spectral index α is erroneously assumed to be α ∗ . Here, PD and 
are the probability of detection when the WMF is applied assuming the true and the wrong spectral index, respectively. The set of values [3,1,0.5,0.05] is used for both α and α ∗ .
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