FROM TH2F
constant
5.499813913435053+-0.20728554264131008
chi2/ndof = 0.8708470420107512
plane
12.256464274354432+-1.3174978055710267
invpt slope = -0.04699999526756453+-0.09870320288001237
theta slope = -5.422387101969111+-1.0639737496982447
chi2/ndof = 0.6677834818299142
from tgraph2D
constant
6.365710487222268+-0.23689440194004208
chi2/ndof = 7.519940322661412
plane
15.790425251926973+-1.118247114875837
invpt slope = 0.06749985524629937+-0.08523561529717436
theta slope = -8.202354284030339+-0.9521142875742482
chi2/ndof = 4.85392722197711