FROM TH2F
constant
0.019602746530436196+-0.020422529557151594
chi2/ndof = 0.010701507526207667
plane
0.10051920833765553+-0.14494959394826507
invpt slope = 0.001745123370900787+-0.02586376335951458
theta slope = -0.07076820291450615+-0.11433699689373579
chi2/ndof = 0.0020486964562447573
from tgraph2D
constant
0.02853899736022005+-0.002318461325643986
chi2/ndof = 0.00027951367176154624
plane
0.10006480437153266+-0.007345166830612101
invpt slope = 0.0038955255552885937+-0.0012447270884060175
theta slope = -0.07175392106401102+-0.006158428239092563
chi2/ndof = 6.109396461095545e-05