FROM TH2F
constant
0.017896191874341865+-0.017719150051544903
chi2/ndof = 0.004028290165412626
plane
0.007306730025388615+-0.04481687877152787
invpt slope = 0.01505236421341741+-0.03311318463115031
theta slope = -0.0008090038986110028+-0.05447052237092189
chi2/ndof = 0.0002583131692282808
from tgraph2D
constant
0.018925550491469545+-0.0011501248249884079
chi2/ndof = 9.656345925362291e-05
plane
0.007804132542119232+-0.0006043877827455444
invpt slope = 0.01397728672548144+-0.0004153199939512993
theta slope = 0.0011634662464064622+-0.0008490533513103334
chi2/ndof = 5.774857896946808e-06