vbremss

A thermal bremsstrahlung spectrum with variable He/H. Based on the Kellogg, Baldwin & Koch polynomial (ApJ 199, 299) fits to the Karzas & Latter (ApJSuppl 6, 167) numerical values. A routine from Kurucz (priv.comm.) is used for low temperatures.

par1	 = 	plasma temperature (keV)

par2	 = 	n(He)/n(H) in units of Solar ratio

K	 = 	, where D is the distance to the

		source (cm) and ,  are the electron and ion densities (cm )