FROM TH2F
constant
0.02494331206777156+-0.024084788244710643
chi2/ndof = 0.006331878779899792
plane
0.07879605460381905+-0.16773782304524748
invpt slope = 0.005070308465544531+-0.02909198065521924
theta slope = -0.05250385027399011+-0.13177410341130166
chi2/ndof = 0.0011510457424442214
from tgraph2D
constant
0.0298152699715764+-0.0021919246432893723
chi2/ndof = 0.00022100854752937614
plane
0.08704400076338542+-0.00457055724245199
invpt slope = 0.004270308587058008+-0.000960675218524748
theta slope = -0.05801248173189365+-0.0037465791152883907
chi2/ndof = 3.12809967053923e-05