FROM TH2F
constant
0.025562994384211165+-0.025601980282347874
chi2/ndof = 0.004018498132142605
plane
0.03754328070998624+-0.20227279766500217
invpt slope = 0.00833023488714468+-0.03219004111153466
theta slope = -0.021322286510134663+-0.16035066589154984
chi2/ndof = 0.0007559342899970752
from tgraph2D
constant
0.028113681269628384+-0.0017832571998307593
chi2/ndof = 0.0001335602621109643
plane
0.04436819850960981+-0.006028093237015148
invpt slope = 0.008155192072470605+-0.0009306932719920222
theta slope = -0.02663247227510534+-0.004858811426235751
chi2/ndof = 2.7537832818693014e-05