FROM TH2F
constant
0.01636319310734649+-0.01574570316632581
chi2/ndof = 0.011570933920477573
plane
0.057264360248989093+-0.084778997195921
invpt slope = -0.0012247986930124161+-0.016067881108549627
theta slope = -0.034043222765053505+-0.07027743757457545
chi2/ndof = 0.00803790566797486
from tgraph2D
constant
0.0277042761392984+-0.001671517940252106
chi2/ndof = 0.00020675394462173346
plane
0.0767540785169108+-0.006641566294012279
invpt slope = 0.00023596626130095028+-0.0011120475844151139
theta slope = -0.04790357627801553+-0.006120337786894906
chi2/ndof = 0.00011407660183446021