FROM TH2F
constant
0.026393920255277356+-0.02030775723817369
chi2/ndof = 0.008953023961206692
plane
0.0534051438940644+-0.1435596193015206
invpt slope = 0.0035445016530720594+-0.016943227800130613
theta slope = -0.028280890482814694+-0.11958128954833248
chi2/ndof = 0.00760190463067622
from tgraph2D
constant
0.03308781776396873+-0.0020414633544829073
chi2/ndof = 0.00029589765656318277
plane
0.07745887323656005+-0.007635962218301283
invpt slope = 0.007720414191641776+-0.001038027401187283
theta slope = -0.050286689935475276+-0.006523478903099951
chi2/ndof = 0.00011670029891249255