FROM TH2F
constant
0.020764699425705926+-0.020798988069353666
chi2/ndof = 0.004644279619187042
plane
0.06573515581013796+-0.14433414446165588
invpt slope = -0.00261572583814885+-0.020913590381636458
theta slope = -0.0347525116795434+-0.12186478862704134
chi2/ndof = 0.002519332990385126
from tgraph2D
constant
0.024832094716961288+-0.0011211557290872437
chi2/ndof = 6.662047894990595e-05
plane
0.061473130679043295+-0.005959699257773221
invpt slope = 0.00029441489770845835+-0.0008403161546194633
theta slope = -0.03317685999307779+-0.005125367399477889
chi2/ndof = 3.753067251714807e-05