FROM TH2F
constant
0.059842394201303314+-0.0007671816061468076
chi2/ndof = 8.178149499206375
plane
-0.06805412213081011+-0.003637870684278997
invpt slope = 0.06287048041161025+-0.0014798403982815502
theta slope = 0.013002007320570025+-0.003126143608941694
chi2/ndof = 1.715918182885866
from tgraph2D
constant
0.07065401188755853+-0.0003738950266903256
chi2/ndof = 19.00855625657863
plane
0.07218393481425689+-0.000573298233947794
invpt slope = -0.002754445609473015+-0.00035440447345610137
theta slope = 0.0028241654594436116+-0.0010179263689032226
chi2/ndof = 18.917384846546366