FROM TH2F
constant
0.006762656646508348+-0.014315341047628223
chi2/ndof = 0.0033500850490425908
plane
0.011405340752767276+-0.09120277248469315
invpt slope = 0.005809490486692723+-0.021711547896747427
theta slope = -0.008578189323817334+-0.08510360079752412
chi2/ndof = 0.0010784483486973818
from tgraph2D
constant
0.008810722374570739+-0.0008780293799868903
chi2/ndof = 3.0066488092713673e-05
plane
0.016716564232849035+-0.0028452412238241906
invpt slope = 0.005904234978611315+-0.0005180844253137186
theta slope = -0.012815220042828182+-0.002703895913030381
chi2/ndof = 6.464478393381204e-06