FROM TH2F
constant
0.02505420280484969+-0.01668472448885507
chi2/ndof = 0.0834773334532634
plane
0.020727852397613402+-0.036143260812428676
invpt slope = 0.006014016920174089+-0.012725421604278541
theta slope = -0.005668496041932689+-0.057891723671473556
chi2/ndof = 0.0826386355052596
from tgraph2D
constant
0.09302933291528448+-0.009554880601368072
chi2/ndof = 0.009586053050193034
plane
-0.022442035769425845+-0.011704177656995798
invpt slope = 0.057656870557697026+-0.00557182855447533
theta slope = 0.046351036807349096+-0.018984646383942698
chi2/ndof = 0.0034294873500919495