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Table 3

Identification of the main absorption features in the RGS and in the HETGS spectrum of 4C +74.26.

Wavelength a z b vout c ΔC d Identification
Å km s-1 Ion Transition
21.602 0.104 2100 ± 900 –9 O vii 1s2−1s2p1P1
21.602 0 0 –14 O vii 1s2−1s2p1P1
13.447 0.104 3900 ± 200 –96 Ne ix 1s2−1s2p1P1
13.447 0 0 –47 Ne ix 1s2−1s2p1P1
12.132 0.104 4100 ± 300 –52 Ne x 1s−2p (Lyα)
 9.378 * 0.104 3600 ± 100 –85 Mg ix 2s2−1s2s22p
 9.281* 0.104 Mg x 1s2(1S)2s−1s(2S)2s2p(3P0)
 9.169 * 0.104 Mg xi 1s2−1s2p1P1

Notes.

(a)

Nominal laboratory wavelength of the line.

(b)

Redshift applied.

(c)

Blueshift applied.

(d)

Improvement of the C-statistics with respect to a model including only the continuum, the emission lines, and the Galactic neutral absorber.

(*)

Lines fitted simultaneously with the same blueshift.

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