FROM TH2F
constant
0.03965578075129626+-0.018650944369480567
chi2/ndof = 0.017287929850443116
plane
0.09383300737138801+-0.12723841595065533
invpt slope = 0.00826125745683924+-0.009127742595640377
theta slope = -0.0666129309220377+-0.11022997840306187
chi2/ndof = 0.007288915175082225
from tgraph2D
constant
0.05415854750691011+-0.002860588985026966
chi2/ndof = 0.0009819563209832152
plane
0.11801413974740263+-0.010726535245168778
invpt slope = 0.009386963716728626+-0.0008712579601845939
theta slope = -0.08660281723104747+-0.009343129991347803
chi2/ndof = 0.00036200147992449867