FROM TH2F
constant
0.023406665046976798+-0.016895180812910828
chi2/ndof = 0.024051858093268787
plane
0.004673870900391462+-0.03843180327269047
invpt slope = 0.028009699994817644+-0.023856616403915006
theta slope = -0.007323047982172578+-0.051017912033577105
chi2/ndof = 0.007162725934712244
from tgraph2D
constant
0.04051678282135614+-0.003970615329677813
chi2/ndof = 0.0015450470370642452
plane
0.00533070107727685+-0.004696100698056441
invpt slope = 0.0354553195851101+-0.002298937381624291
theta slope = -0.012195162563845128+-0.006576042691880377
chi2/ndof = 0.00044989908019668227