Measured correlation function in four ranges of μ. The most radial range (top-left μ> 0.95) has, in addition to the BAO peak at ~100 h^-1 Mpc, a peak at ~60 h^-1 Mpc due to correlated absorption by Lyα and SiIII(119.0,119.3) at the same physical position. In the next radial bin (top-right, 0.8 <μ< 0.95) only the BAO peak is visible. The lines show fits including successively Lyα and metal absorption, unidentified HCDs absorption, UV flux fluctuations, and a (i_min,i_max,j_max) = (0,2,6) broadband (BB).