FROM TH2F
constant
0.020563784258450277+-0.018669191618312077
chi2/ndof = 0.018535614401221645
plane
0.09373551479178541+-0.12281455677832269
invpt slope = 0.006979450395690798+-0.020655990016949764
theta slope = -0.0713915980870169+-0.10198255226466188
chi2/ndof = 0.007414812043171528
from tgraph2D
constant
0.03575605484106692+-0.004324020250718585
chi2/ndof = 0.001215314823448912
plane
0.15184741707895946+-0.012554750690193269
invpt slope = 0.006763939595216209+-0.0026378734438047614
theta slope = -0.12198069399539006+-0.01129228755223133
chi2/ndof = 0.0004141070293261763