FROM TH2F
constant
0.01461934385045921+-0.01660833153766436
chi2/ndof = 0.010907009810310423
plane
0.06993483872692924+-0.11815574659486058
invpt slope = 0.00610459605692847+-0.017334669824187077
theta slope = -0.052531255043657195+-0.09707730765613552
chi2/ndof = 0.003050609698669449
from tgraph2D
constant
0.022857937442693845+-0.0021475071642467307
chi2/ndof = 0.0002767072212217623
plane
0.07538072731923641+-0.006551199786224612
invpt slope = 0.009720494229542577+-0.0010438433858097665
theta slope = -0.06053518235527274+-0.005907900845213676
chi2/ndof = 6.871267795733916e-05