-doublet with a binning of 4.
We are also going to constrain our velocities and sigmas.</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="c1"># Fit!</span>
<span class="n">vel_map</span><span class="p">,</span> <span class="n">broad_map</span><span class="p">,</span> <span class="n">flux_map</span><span class="p">,</span> <span class="n">ampls_map</span> <span class="o">=</span> <span class="n">cube</span><span class="o">.</span><span class="n">fit_cube</spa