FROM TH2F
constant
0.03875670187460379+-0.01812309648528403
chi2/ndof = 0.017402128220628626
plane
0.03329329343269118+-0.11678190503209251
invpt slope = 0.010370183924260664+-0.009200845765306552
theta slope = -0.01756086292621248+-0.09784827191206318
chi2/ndof = 0.0066578199226609595
from tgraph2D
constant
0.05430122995137579+-0.0030757217345813393
chi2/ndof = 0.0011730479597380382
plane
0.02214110335300433+-0.010461742487054167
invpt slope = 0.01239733805249467+-0.000735442558171578
theta slope = -0.008414604472288848+-0.008811152482396886
chi2/ndof = 0.00035043248478781966