FROM TH2F
constant
0.022658487565542413+-0.019937836537772115
chi2/ndof = 0.008835157358569446
plane
0.009466822386393877+-0.09490009402553574
invpt slope = 0.004565416136081499+-0.017707394875013802
theta slope = 0.004792692965484918+-0.08168408309225283
chi2/ndof = 0.007820169757651565
from tgraph2D
constant
0.030028255497673375+-0.0021316416872230026
chi2/ndof = 0.00027717767324145665
plane
0.054023618973318664+-0.009526649275192483
invpt slope = 0.007026614632906934+-0.0014338304595978386
theta slope = -0.032967003430245334+-0.008161315734973414
chi2/ndof = 0.00017328999689433761