NAME:
	synstar
 PURPOSE: (one line)
	Compute a synthetic (gaussian) star image.
 DESCRIPTION:
 CATEGORY:
	Mathematical
 CALLING SEQUENCE:
	image = synstar(nx,ny,x,y,flux,sig)
 INPUTS:
	nx   - X dimension of image.
	ny   - Y dimension of image.
	x    - X location(s) of synthetic star(s).
	y    - Y location(s) of synthetic star(s).
	flux - Integrated strength of star(s).
	sig  - 1/e half-width of star image.
 OPTIONAL INPUT PARAMETERS:
 KEYWORD PARAMETERS:
 OUTPUTS:
	return - nx by ny image containing star.
 COMMON BLOCKS:
 SIDE EFFECTS:
 RESTRICTIONS:
 PROCEDURE:
 MODIFICATION HISTORY: