FROM TH2F
constant
0.023544123393101798+-0.017048993808940257
chi2/ndof = 0.013893907147928809
plane
0.0007970089372235931+-0.0395904419576692
invpt slope = 0.02469014261314912+-0.024346686845241283
theta slope = 0.0033672544548243926+-0.05315745842640336
chi2/ndof = 0.0010002353219403847
from tgraph2D
constant
0.0320774720903091+-0.0025333044697555315
chi2/ndof = 0.0006225102590524177
plane
0.0010452008166901337+-0.001815009016790876
invpt slope = 0.02595830872784525+-0.0009106315449531445
theta slope = 0.0032877915245735825+-0.0024671993480551574
chi2/ndof = 6.473871356364345e-05