FROM TH2F
constant
0.0294450432521777+-0.02050959470821276
chi2/ndof = 0.005044709196597427
plane
0.01204904187967053+-0.05024462601743543
invpt slope = 0.018297341239501948+-0.031415262980276165
theta slope = 0.0014448015099820294+-0.06396620674685417
chi2/ndof = 0.00012737297827089737
from tgraph2D
constant
0.03105245872739924+-0.00145631970856044
chi2/ndof = 0.00018239457004598885
plane
0.014316968139480541+-0.0006373045558436257
invpt slope = 0.0167270795546381+-0.0003727494255235629
theta slope = 0.0017635554986879956+-0.0008708774496585206
chi2/ndof = 7.318134081532612e-06