FROM TH2F
constant
5.626065132284324+-0.31145003260476145
chi2/ndof = 1.4929733267799488
plane
13.712123230587117+-2.064667558171243
invpt slope = -0.9990125069570099+-0.27133954629870427
theta slope = -5.11672204860891+-1.8223591115847242
chi2/ndof = 1.015809980575136
from tgraph2D
constant
7.215000137669294+-0.3919321493698479
chi2/ndof = 9.677481001925058
plane
19.736551485220318+-1.4901616431963784
invpt slope = -1.008038411711964+-0.20549284293238118
theta slope = -9.605114681563942+-1.3493027025095077
chi2/ndof = 3.745638873405311