FROM TH2F
constant
0.02119354153140306+-0.0162763407815903
chi2/ndof = 0.010768088567820574
plane
0.06512758803807031+-0.09242970171852742
invpt slope = 0.008062722637972555+-0.014092801223500095
theta slope = -0.046249931105549175+-0.07763855891379716
chi2/ndof = 0.0035806568345537423
from tgraph2D
constant
0.02933147956670267+-0.0020654827994266347
chi2/ndof = 0.0003754272891377068
plane
0.07819587755077438+-0.005113394632890669
invpt slope = 0.009904425414025957+-0.0009409714657402713
theta slope = -0.05846582387760926+-0.004588083101654547
chi2/ndof = 0.00010534635361738237