ve magnification: abs(mu2/mu1) or abs(dl1/dl2)**2.</span>
<span class="sd">    dt : `float.array`</span>
<span class="sd">        relative time delay: abs(t1-t2) in days.</span>
<span class="sd">    &quot;&quot;&quot;</span>

    <span class="n">t</span> <span class="o">=</span> <span class="n">param</span><span class="p">[</span><span class="s2">&quot;geocent_time&quot;</span><span class="p">]</span>
    <span class="n">mu</span> <span class="o">=</span> <span class="n">param</span><span class="p">[</span>