FROM TH2F
constant
0.02346655524510294+-0.020114566363816203
chi2/ndof = 0.004213795617326871
plane
0.05047252427076873+-0.13903304985955642
invpt slope = 0.005598319133252294+-0.02058948553162716
theta slope = -0.02923378908069523+-0.1088468665882954
chi2/ndof = 0.001523873111934202
from tgraph2D
constant
0.0261571616182151+-0.0015209313396325475
chi2/ndof = 0.00014804685695145144
plane
0.05661743630712306+-0.005703959848223532
invpt slope = 0.0063930544327066+-0.000806128803308443
theta slope = -0.03455093660172213+-0.004533023329503598
chi2/ndof = 4.5915927624952095e-05