FROM TH2F
constant
0.023770907937321888+-0.016923252676295464
chi2/ndof = 0.02334217008387451
plane
-0.0005610116562622543+-0.03856465389930611
invpt slope = 0.032492412443921176+-0.025491920539584663
theta slope = -0.002428951018341184+-0.05097660606374385
chi2/ndof = 0.0036075034340858547
from tgraph2D
constant
0.040155831047345436+-0.0036605607002992845
chi2/ndof = 0.0013265707594225008
plane
-0.0006569499892848266+-0.0029961395011113803
invpt slope = 0.03679445369604902+-0.0015103961046330602
theta slope = -0.0034718381766863874+-0.004073294070683302
chi2/ndof = 0.00018677726097663627