COMMON jfit_parameters, jfit_poly, jfit_crbase, jfit_aubase, jfit_amp_factor, $
			jfit_xverts, jfit_yverts, jfit_what_is_it, $
			jfit_ave_thk, jfit_fwhm_duty, $
			jfit_1keV, jfit_4keV, jfit_8keV, jfit_calc_effics