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Spectral shape of the UV ionizing background and He II absorption at redshifts 1.8 < z < 2.9

I. I. Agafonova, S. A. Levshakov, D. Reimers, C. Fechner, D. Tytler, R. A. Simcoe and A. Songaila

A&A, 461 3 (2007) 893-909

Published online: 24 October 2006

DOI: 10.1051/0004-6361:20065721

I. I. Agafonova

S. A. Levshakov

D. Reimers

C. Fechner

D. Tytler

R. A. Simcoe

A. Songaila

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