FROM TH2F
constant
0.016092949080101403+-0.015615138873220752
chi2/ndof = 0.005780268185825889
plane
0.02583952085015436+-0.0959378497438086
invpt slope = 0.004364618465049488+-0.012313530279560937
theta slope = -0.013982873991422989+-0.0796789132181232
chi2/ndof = 0.0034413256316600705
from tgraph2D
constant
0.020097466512416087+-0.0010680907895386123
chi2/ndof = 8.327970923321167e-05
plane
0.03227776018996217+-0.0037850613064784044
invpt slope = 0.005403210494340212+-0.00047567341734498385
theta slope = -0.01900599288159395+-0.003412373726437187
chi2/ndof = 2.903844219940308e-05