y default divides by exposure time, as this
is more suitable for automatic processing.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>step</strong> (<em>int</em>) – Time step in the data cube.</p></li>
<li><p><strong>lambda_min</strong> (<em>float</em>) – Minimum wavelength of the interpolation region</p></li>
<li><p><strong>lambda_max</strong> (<em>float</em>) – Maximum wavelength of the interpolation region</p></li>
<