FROM TH2F
constant
0.024281619086518623+-0.023763181942455865
chi2/ndof = 0.006306975667326774
plane
0.031218091909030327+-0.12890845808785756
invpt slope = 0.008251138496810551+-0.02925529360932461
theta slope = -0.016588735874867182+-0.1025813351309846
chi2/ndof = 0.003702299479354459
from tgraph2D
constant
0.02917394783276942+-0.0021045298224059076
chi2/ndof = 0.00020373610557408226
plane
0.058842728649759285+-0.007823823791264234
invpt slope = 0.0066236124426034635+-0.0016578217711942299
theta slope = -0.0364918542987528+-0.006381202249395197
chi2/ndof = 9.393038078920337e-05