FROM TH2F
constant
5.018086849100031+-0.26040734321167597
chi2/ndof = 1.5235446802355197
plane
8.263427584662221+-0.6499627703784634
invpt slope = -2.296514439076598+-0.3252993216307787
theta slope = 0.35454666519145395+-0.8412511884162931
chi2/ndof = 0.8089421014144426
from tgraph2D
constant
6.51710760134284+-0.16840059643896907
chi2/ndof = 2.5806472373873603
plane
5.558270608805051+-0.30991058249746
invpt slope = -0.4099329965021431+-0.17585560825931615
theta slope = 2.3602680987049913+-0.40529198972123215
chi2/ndof = 1.8524540233008722