Rapid-response mode VLT/UVES spectroscopy of super iron-rich gas exposed to GRB 080310 - Evidence of ionization in action and episodic star formation in the host

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Table 6

N v column densities and variability.

	log N(N v) ± σ_log N^a
	blue comp.	red comp.	total

Epoch II	13.87 ± 0.05	13.70 ± 0.06	14.10 ± 0.04
Epoch IV	13.81 ± 0.02	13.68 ± 0.03	14.05 ± 0.02

σ _II,IV ^b	1.1	0.3	1.1

v^c (km s^-1)	−53 ± 1	1 ± 1
b (km s^-1)	23 ± 2	18 ± 2

Notes.

^(a)

Logarithm of the N v column density and corresponding 1σ error estimate, as derived from a Voigt-profile fit of the λλ1238, 1242 transitions ( averaged between the two epochs).

^(b)

Significance of the epoch II – epoch IV variation.

^(c)

Zero velocity reference at z = 2.42743.

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