(vi) The regions will continue to appear on the display under the "Controls" GUI tab. Selecting "Region" -> "Delete Regions" will remove all of the regions shown on the frame.
[[File:RealTimeSHOC.jpg|800px|left]]<br clear=all>
==== Totcounts and bscounts ====
Totcounts are the total counts in the box region, while bscounts has the calculated background (see below) subtracted from the total.
==== Background and Noise ====
The background and noise are obtained from the outer 4 pixel-wide perimeter of the selected region. The background value is the median value of this area and the noise value is the RMS.
==== Centroid ====
The centroid is obtained by locating the brightest 9 pixel box and computing the centroid of the background subtracted data about this point.
==== FWHM ====
The FWHM is estimated from the image moments about the centroid, assuming a Gaussian distribution.
===FITS Header Keywords===