FROM TH2F
constant
0.007284006204559624+-0.016737804059405715
chi2/ndof = 0.006718463737113989
plane
0.01021978466679231+-0.19627119221086964
invpt slope = 0.00027903552107332946+-0.01672812387282945
theta slope = -0.002746907055125597+-0.16888137733763142
chi2/ndof = 0.0072865160855619514
from tgraph2D
constant
0.01304966404096099+-0.0013125539282899876
chi2/ndof = 4.9961136625492276e-05
plane
0.05330428454470609+-0.015191981508717058
invpt slope = 0.00017977501483857716+-0.001244403065740505
theta slope = -0.03317973051267939+-0.012485460109441905
chi2/ndof = 4.2282976766996244e-05