The protons are fit alone in the following table.  Keep in mind that a fit to one particle is not robust.  The high correlation between T and beta causes problems.
 

	T	beta
2 AGeV	115+- 37	0.42+-0.07
4 AGeV	115+-15	0.50+-0.04
6 AGeV	93+-12	0.53+-0.03
8 AGeV	103+-21	0.53+-0.04