FROM TH2F
constant
5.075132093571497+-0.21778691647664286
chi2/ndof = 0.5333159846285183
plane
4.1140985055637+-1.5707568111904437
invpt slope = 0.04076204895918974+-0.10858321133605575
theta slope = 0.7058770115822834+-1.2723915128207202
chi2/ndof = 0.539718896938416
from tgraph2D
constant
5.573914874855742+-0.1693730832324213
chi2/ndof = 3.1842837880503865
plane
9.527532040916478+-1.114856762520889
invpt slope = 0.05413314262813859+-0.07344911682176841
theta slope = -3.6677847764618345+-0.9182431683593258
chi2/ndof = 2.800307895873797