FROM TH2F
constant
0.015246010070662588+-0.015940519687240327
chi2/ndof = 0.004406999209099918
plane
0.03466348868380563+-0.08699983285949375
invpt slope = 0.0017725862883821897+-0.011752110082416481
theta slope = -0.01939445000896737+-0.075866059997972
chi2/ndof = 0.0032468065582885357
from tgraph2D
constant
0.018099846695658006+-0.0011271269515402008
chi2/ndof = 8.384740088298409e-05
plane
0.034202229976637924+-0.004887912884707397
invpt slope = 0.0034910681332272677+-0.0007702023083544655
theta slope = -0.019757588283956923+-0.004534698384527291
chi2/ndof = 5.715905067145629e-05