Expected upper limits, using the B (alternate) model : 
expected limit (median)
4.4984945287894975
expected limit (-1 sig)
3.2262721859999104
expected limit (+1 sig)
7.9478876235781835
expected limit (-2 sig)
1.6498319216062292
expected limit (+2 sig)
25.0
0 Signal events, 8 BKG
90.0%  upper limit
4.237582017891943