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astro-ph1998★ 1 cited
First estimate of the time delay in HE 1104-1805
Lutz Wisotzki, Olaf Wucknitz, Sebastian Lopez +1
We present first results from five years of spectrophotometric monitoring of the bright double QSO and gravitational lens HE 1104-1805. The quasar has varied considerably over this…
astro-ph1998★ 83 cited
First Comparison of Ionization and Metallicity in Two Lines of Sight Toward HE 1104-1805 AB at z=1.66
Sebastian Lopez, Dieter Reimers, Michael Rauch +2
Using new HST/FOS, NTT/EMMI, and Keck/HIRES spectra of the gravitationally-lensed double QSO HE 1104-1805 AB (z=2.31, θ=3.2), and assuming UV photoionization by a metagalactic radi…