NGC5927
 3 iterations.
Chebyshev coeffients a(0)T_0(u)+a(1)T_1(u)+..., where u is log (r/arcsec) mapped to [-1,1]
 a(0)=    19.280 +-  0.240
 a(1)=     2.015 +-  0.423
 a(2)=     0.281 +-  0.394
 a(3)=     0.320 +-  0.348
 a(4)=    -0.173 +-  0.313
 a(5)=     0.146 +-  0.251
Power-of-x coeffients a(0)+a(1)x+a(2)x^2+..., where x=1+(r/r_c)^2, r_c=1.06
 a(0)=     7.2578
 a(1)=     7.4510
 a(2)=   -13.1878
 a(3)=    10.5466
 a(4)=    -3.6798
 a(5)=     0.4791
log r(arcsec)   mu_V    mu_V(fitted)  residual   weight  data set