class="pre">float</span></code>, default=4.5</span></dt><dd><p>Laplacian-to-noise limit for cosmic ray detection.
Lower values will flag more pixels as cosmic rays.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">sigfrac</span></code><span class="classifier"><code class="docutils literal notranslate"><span class="pre">float</span></code>, default=0.3</span></dt><dd><p>Fractional detection limit for neighboring pixels.
For cosmic ray neighbor pixels, a Laplacian-to-noise
detection 