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astro-ph2001
A Measurement of the Contamination in [OIII] lambda 5007 Surveys of Intracluster Stars and the Surface Density of z=3.13 Ly-alpha Galaxies
Robin Ciardullo, John Feldmeier, Kara Krelove +2
We present two pieces of evidence supporting the hypothesis that the bright [OIII] lambda 5007 sources found in Virgo's intracluster space are intracluster planetary nebulae, rathe…
astro-ph1998
Gravitational lensing statistics and constraints on the cosmological constant revisited
Yu-Chung N. Cheng, Lawrence M. Krauss
We re-analyze constraints on the cosmological constant that can be obtained by examining the statistics of strong gravitational lensing of distant quasars by intervening galaxies,…