eso: | ESO, code E in column (3) of Table 1 |
e2x: | ESO code E2 in column (3), Table 1, and "x" is arbitrary |
cxx: | code C in column (3), Table 1, and "x" is arbitrary |
c2x: | code C2 in column (3), Table 1, and "x" is arbitrary |
lxx: | code L in column (3), Table 1, and "x" is arbitrary |
Reference is to Table 1 of Santos-Lleó et al.