FROM TH2F
constant
0.026766100138258364+-0.01969554505262272
chi2/ndof = 0.008428263167337979
plane
0.03941828858924663+-0.14829093430834345
invpt slope = 0.0052472208462764946+-0.014802874596000933
theta slope = -0.018774617619626094+-0.1229038599652092
chi2/ndof = 0.006620097619018874
from tgraph2D
constant
0.03334336939318981+-0.0018466781665902336
chi2/ndof = 0.00025576651881536577
plane
0.04063858147430283+-0.00982920348274972
invpt slope = 0.006810930947986409+-0.0009175362644829824
theta slope = -0.01773112466180171+-0.00814281668001537
chi2/ndof = 0.00014676732540603305