}\sum_{i=1}^{N}(P_i - \overline{P}))^{1/2}}{\overline{P}}\]</div>
<p>where <span class="math notranslate nohighlight">\(P_i\)</span> is the background-corrected count rate in a given bin of the pulse profile,
<span class="math notranslate nohighlight">\(\overline{P}\)</span> is the count rate averaged over the pulse period,
and <span class="math notranslate nohighlight">\(N\)</span> is the total number of phase bins in the profile.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Th