ault: Min=0 and Max=half the cube total velocity width]</p>
</dd>
<dt>pa_prior<span class="classifier">object</span></dt><dd><p>Optional - supply an object defining the PA prior (see GAStimator documentation). [Default = boxcar between range limits]</p>
</dd>
<dt>xc_prior<span class="classifier">object</span></dt><dd><p>Optional - supply an object defining the RA centre prior (see GAStimator documentation). [Default = boxcar between range limits]</p>
</dd>
<dt>yc_prior<span class="classifier">object</span><