FROM TH2F
constant
0.026747911273776768+-0.01998055446009305
chi2/ndof = 0.008552279219179348
plane
0.04195265504376919+-0.13961150905885386
invpt slope = 0.0034770585811249276+-0.016755010719655766
theta slope = -0.018306634397525723+-0.1164629197943506
chi2/ndof = 0.007742027385471433
from tgraph2D
constant
0.03315432385309089+-0.0017528073063772488
chi2/ndof = 0.0002273526755440246
plane
0.06034587094274267+-0.006854622635033322
invpt slope = 0.0074865873021411344+-0.0009118004702544446
theta slope = -0.03506692751585867+-0.005814230731115126
chi2/ndof = 9.644620010306262e-05