FROM TH2F
constant
0.018362027894299082+-0.015343096622343667
chi2/ndof = 0.01131694587024545
plane
0.0689907967610874+-0.10009074642786371
invpt slope = 0.005420601907924122+-0.011957861634430196
theta slope = -0.047933267885991664+-0.07995115008124504
chi2/ndof = 0.004331654746441621
from tgraph2D
constant
0.027623890406359635+-0.0020500950371665364
chi2/ndof = 0.0003530427315677296
plane
0.0837549923476509+-0.005696897238635213
invpt slope = 0.0070160444444641356+-0.0009527170463872809
theta slope = -0.060460200019608425+-0.004912426643347349
chi2/ndof = 0.0001115834995575135