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astro-ph.CO2009
Improved Constraints on the Gravitational Lens Q0957+561. II. Strong Lensing
Ross Fadely, Charles R. Keeton, Reiko Nakajima +1
We present a detailed strong lensing analysis of an HST/ACS legacy dataset for the first gravitational lens, Q0957+561. With deep imaging we identify 24 new strongly lensed feature…
astro-ph.CO2009
Improved Constraints on the Gravitational Lens Q0957+561. I. Weak Lensing
R. Nakajima, G. M. Bernstein, R. Fadely +2
Attempts to constrain the Hubble constant using the strong gravitational lens system Q0957+561 are limited by systematic uncertainties in the mass model, since the time delay is kn…