FROM TH2F
constant
0.024980575146439907+-0.024102771794674148
chi2/ndof = 0.007792621477166468
plane
0.09360345574276568+-0.16822158896701736
invpt slope = 0.0018614759795674164+-0.027753231125004236
theta slope = -0.06247255918010276+-0.13361633636459408
chi2/ndof = 0.001958479615085221
from tgraph2D
constant
0.03122109152991275+-0.0025029263103633253
chi2/ndof = 0.0002881734452947485
plane
0.09747316344741093+-0.0055845941377975885
invpt slope = 0.002957576429438654+-0.001151555778068391
theta slope = -0.06620375770214353+-0.00452139691481206
chi2/ndof = 4.3891685424382966e-05