FROM TH2F
constant
33.95476390950499+-0.734142020224539
chi2/ndof = 31.89957554342558
plane
69.19031351318856+-8.335107767684779
invpt slope = -3.3358346124524245+-0.28586725545985187
theta slope = -18.016627642420374+-6.5511747173562735
chi2/ndof = 30.328309619900647
from tgraph2D
constant
64.39041759890762+-6.012645734184625
chi2/ndof = 2494.48169182395
plane
203.39768485506096+-55.48728617422701
invpt slope = -2.206266863519986+-2.125088408224962
theta slope = -103.8731790121693+-43.92628221789614
chi2/ndof = 2296.6999525335955