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
0.0549594027292485+-0.0020769622999028607
chi2/ndof = 0.0014321724350556042
plane
0.016010851603503417+-0.005140242378415056
invpt slope = 0.022756967285670133+-0.002241431927286969
theta slope = 0.006763657272716986+-0.006301446069031482
chi2/ndof = 0.001088969476918619