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Table 4

Upper limits to the flux emitted by the envelope in the N v doublet, compared to the flux emitted in the Lyα line.

Object Flux(N v) Flux(Lyα) Flux
[erg cm-2 s-1] ratio

BR 1033−0327  ≲2 × 10-18 1.4 × 10-17  <0.14
SDSS J14472+0401  ≲ 1 × 10-18 4.3 × 10-18  <0.23
SDSS J21474−0838  ≲ 5 × 10-17 3.1 × 10-16  <0.16
BR 2237−0607  ≲ 1.3 × 10-18 2.6 × 10-18  <0.50

Notes. The last column gives the ratio of Cols. 2 to 3 (see text).

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