ed (<cite>bkg_range</cite> is not None)
<span class="math notranslate nohighlight">\(N = (P - \bar{B})/(P_{max} - \bar{B})\)</span>
where <span class="math notranslate nohighlight">\(\bar{B}\)</span> is the mean level in <cite>bkg_range</cite>
method = 1 : <span class="math notranslate nohighlight">\(N = (P-P_{min})/\bar{P}\)</span></p>
</div></blockquote>
<p><strong>bkg_range: list, optional</strong></p>
<blockquote>
<div><p>The background phase range for background estimation</p>
</div></blockquote>
<p><s