FROM TH2F
constant
0.022253072486983397+-0.017111504468371116
chi2/ndof = 0.024882756598649025
plane
0.003575300191355149+-0.03737241246252506
invpt slope = 0.026471281061825013+-0.024925149989341946
theta slope = -0.00454332961679127+-0.0559478183878063
chi2/ndof = 0.00996963595012365
from tgraph2D
constant
0.039942921344376464+-0.0038991744832129137
chi2/ndof = 0.0013835241101296206
plane
0.00031128955139716596+-0.004234602523002984
invpt slope = 0.035884290753600896+-0.0023062860598010966
theta slope = -0.0021469051084636085+-0.006212244010114637
chi2/ndof = 0.00036571695149032276