FROM TH2F
constant
0.022134290753234188+-0.018744011003983464
chi2/ndof = 0.011238677047746375
plane
0.0720952125592195+-0.11842806566888206
invpt slope = -0.0063435964398532415+-0.018456948529832314
theta slope = -0.03454455863615502+-0.09247653837372646
chi2/ndof = 0.00831946829170704
from tgraph2D
constant
0.03289035329770187+-0.0017425318577907925
chi2/ndof = 0.00021254920927981906
plane
0.0826853526121743+-0.00720190521467982
invpt slope = 0.0016809126098049558+-0.0011598500633639244
theta slope = -0.050039459682506365+-0.006434241624823387
chi2/ndof = 0.00011126393368059755