FROM TH2F
constant
0.009508757572290884+-0.01365453136869231
chi2/ndof = 0.012340726395004798
plane
0.04261267738315406+-0.10516081053363721
invpt slope = -0.000554681393092576+-0.00957948072338264
theta slope = -0.027815512500600662+-0.0883800178651783
chi2/ndof = 0.010751356676499629
from tgraph2D
constant
0.019488340172936658+-0.0018009440373193371
chi2/ndof = 0.00018811716668635993
plane
0.06656207068312145+-0.010093922344278103
invpt slope = 0.0024367093065430956+-0.0011074534941160025
theta slope = -0.04716854785375359+-0.00957096354506504
chi2/ndof = 0.0001341409568741118