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Table 2

Absorption systems.

Target z abs β Main Strength S/N a Associated low ions
doublet present in the 2 spectra
AO 0235+164 + 0.00002 Na i w 67–56 none
0.52432 0.235 Mg ii VSm 28–14b Mg i, Fe ii, Mn ii, Ca ii, Ti ii
0.85142 0.045 Mg ii w 62–50 none
0.85237 0.045 Mg ii S 62–50 Mg i, Fe ii
0.85562 0.043 Mg ii w 62–50 none
PKS 0458−020 0.89025 0.503 Mg ii S 11–13 Fe ii
1.52712 0.257 Mg ii VSm 15b–5 Fe ii
1.56055 0.244 Mg ii S 14b–5 C i, Fe ii, Zn ii, Cr ii, Ni ii
2.03956 0.078 Mg ii S 10b’–5 Fe ii, Zn ii, Cr ii, Ni ii, Si ii
PKS 1229−02 −0.00016 Na i w 52–15 Ca ii
0.39458 0.364 Mg ii VSm 44–13 Mg i, Fe ii, Mn ii, Ca ii, Ti ii
0.69990 0.182 Mg ii Vw 50–13 none
0.75643 0.150 Mg ii ws 50–13 Mg i, Fe ii
0.76836 0.144 Mg ii w 50–14 none
0.83032 0.110 Mg ii w 53–14 Fe ii
0.83102 0.110 Mg ii Vw 53–14 none
0.83128 0.109 Mg ii w 53–14 Fe ii
PKS 1741−038 −0.00070 Na i w 12–32 none
−0.00033 Na i S 12–32 DIBs
0.52739 0.288 Mg ii w 5–13 none
0.52822 0.287 Mg ii S 5–13 Mg i, Fe ii
0.67846 0.199 Mg ii w 8–18 none
0.90799 0.074 Mg ii VSm 10–28 Mg i, Fe ii
FBQS J2340−0053 −0.00002 Na i S 29–68 Ca ii
1.36064 0.261 Mg ii VSm 30b–64 C i, Fe ii, Zn ii, Cr ii, Si ii, Ni ii
2.05454 0.010 Fe ii VSm 34 b'–56b' C i, C i⋆, Fe ii, S ii, Si ii

Notes. VSm: Very strong, highly multiple absorption, wr(2796) ≳ 2.0 Å. S: Strong absorption, wr(2796 or 5891) > 0.3 Å. w: Weak absorption, 0.02 <wr(2796 or 5891) < 0.3 Å. ws: Although weak, the Mg ii doublet is saturated. Vw: Very weak absorption, wr(2796) < 0.02 Å.

(a)

S/N per pixel around the main absorption for the older and recent epoch, respectively.

(b,b’)

Mg ii region not covered; we list instead the S/N around Fe ii2374–2382, Fe ii1608–1611.

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