58 citations · 60 across the 7 of their papers we have counts for
Showing astro-phShow all
2 papers · 1 filter
astro-ph2006★ 58 cited
A Strong X-Ray Flux Ratio Anomaly in the Quadruply Lensed Quasar PG 1115+080
David Pooley, Jeffrey A. Blackburne, Saul Rappaport +2
PG 1115+080 is a quadruply lensed quasar at z=1.72 whose image positions are well fit by simple models of the lens galaxy (at z=0.31). At optical wavelengths, the bright close pair…
astro-ph2004
The Hubble Constant from Gravitational Lens Time Delays
Paul L. Schechter
Present day estimates of the Hubble constant based on Cepheids and on the cosmic microwave background radiation are uncertain by roughly 10% (on the conservative assumption that th…