SECTION./ART_
CREATE/ART_IMAGE frame frame dims [starts,steps] [func_type] [coefs]
CREATE/ART_IMAGE frame = ref_frame [func_type] [coefs]
	create artificial image
SECTION./RAMP
CREATE/RAMP image [slope] [angle] [dimension ]
	generate uniform sloping image, with mean flux per pixel of 100 units
SECTION./SPC1
CREATE/SPC1 image [slope] [ampl] [period] [phase] [dim]
	generate sinusoidal, sloping 1-dimensional image
SECTION./SPC2
CREATE/SPC2 image [period] [slope] [phase] [dimension]
	generate a discrete 1-dimensional image
SECTION./SPC3
CREATE/SPC3 image psf_option centring table boxwidth-or-fwhm
	generate an artificial spectrum with lines 
SECTION./WAVE
CREATE/WAVE image [amplitude] [period] [dimension]
	generate 2-dimensional sinusoidal background image
