FROM TH2F
constant
17.467239450264955+-0.4891597410234759
chi2/ndof = 25.868563747845506
plane
43.29901607362809+-3.5970417545407023
invpt slope = -9.581929224477898+-0.3665537583968837
theta slope = 1.00968293459999+-3.194344762410241
chi2/ndof = 16.660166674198656
from tgraph2D
constant
40.628939048834056+-2.458908093753916
chi2/ndof = 483.6983202303971
plane
60.762539698918715+-11.984894008633836
invpt slope = 3.284424782298939+-2.0209526980286587
theta slope = -23.044566766237782+-10.394137187524363
chi2/ndof = 454.51757559633893