NGC288
 6 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)=    22.951 +-  0.153
 a(1)=     3.965 +-  0.251
 a(2)=     1.229 +-  0.239
 a(3)=     0.218 +-  0.204
Power-of-x coeffients a(0)+a(1)x+a(2)x^2+..., where x=1+(r/r_c)^2, r_c=1.80
 a(0)=     8.5190
 a(1)=     0.7590
 a(2)=    -0.0946
 a(3)=     0.3631
log r(arcsec)   mu_V    mu_V(fitted)  residual   weight  data set