NGC5904 (M5)
 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)=    21.115 +-  0.113
 a(1)=     6.045 +-  0.184
 a(2)=     1.251 +-  0.167
 a(3)=     0.268 +-  0.163
Power-of-x coeffients a(0)+a(1)x+a(2)x^2+..., where x=1+(r/r_c)^2, r_c=1.48
 a(0)=     5.2885
 a(1)=     1.8529
 a(2)=    -0.2466
 a(3)=     0.1528
log r(arcsec)   mu_V    mu_V(fitted)  residual   weight  data set