nlinear”, “quadratic”, “exponential”, “logarithmic”, “squareroot”, “linear”, “uniform”, “power2”, or “custom”).</p></li>
<li><p><strong>fp</strong> (<em>float</em><em>, </em><em>optional</em>) – Planet-to-star flux ratio (for secondary eclipse models).</p></li>
</ul>
</dd>
</dl>
<div class="admonition note">
<p class="admonition-title">Note</p>
<ul class="simple">
<li><p>Units for the orbital period and ephemeris can be anything as long as they are consistent (e.g. both i