FROM TH2F
constant
0.01738752516925769+-0.01716693963296484
chi2/ndof = 0.0035990909606572236
plane
0.0093075875871583+-0.03977583622958848
invpt slope = 0.009606389516321064+-0.02675085587651267
theta slope = -0.00019062180871301298+-0.058051913213899034
chi2/ndof = 0.0014027450482798547
from tgraph2D
constant
0.017892817696744733+-0.0011200579531217478
chi2/ndof = 9.283520655791974e-05
plane
0.007541782013527254+-0.0011827973354564157
invpt slope = 0.01122494999811131+-0.0007723735884473154
theta slope = 0.0015351260574014806+-0.0018040687921788026
chi2/ndof = 2.3355471747578504e-05