Measuring Stellar FWHM

There are a number of steps in odi-tools that require having a measurement of the stellar fwhm of sources on individual OTAs or on a fully stacked image. In order to get these measurements we use the pyraf task rimexam on a list of known x and y positions for SDSS sources on a given field. Here is how the parameters are set for rimexam:

iraf.tv.rimexam.setParam('radius',radius)
iraf.tv.rimexam.setParam('buffer',buff)
iraf.tv.rimexam.setParam('width',width)
iraf.tv.rimexam.setParam('rplot',20.)
iraf.tv.rimexam.setParam('center','yes')
iraf.tv.rimexam.setParam('fittype','gaussian')
iraf.tv.rimexam.setParam('iterati',1)