H0=75km/s/Mpc

[Andrzej Marecki]

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[...]

Paper: astro-ph/0306216
From: L.V.E. Koopmans <leon w astro.rug.nl>
Date: Wed, 11 Jun 2003 01:59:39 GMT   (350kb)

Title: The Hubble Constant from the Gravitational Lens B1608+656
Authors: L.V.E. Koopmans (Caltech/STScI), T. Treu (Caltech), C.D. Fassnacht (UC
  Davis), R.D. Blandford (Caltech), G. Surpi (Caltech)
Comments: 16 pages, 6 figures, 5 tables; submitted to ApJ
\\
  We present a refined gravitational lens model of the four-image lens system
B1608+656 based on new and improved observational constraints: [...]

A combined gravitational-lens and stellar dynamical analysis leads to a
value of the Hubble Constant of H_0=75(+7/-6) km/s/Mpc (68 percent CL;
Omega_m=0.3, Omega_Lambda=0.7.

[...]

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It's important to note that originally the same group claimed that H0 might
be as low as... 61 km/s/Mpc, see: Fassnacht et al. (2002) ApJ, 581, 823

-- 
Andrzej