The Effects of Weak Gravitational Lensing on Determinations of the Cosmology from Type Ia Supernovæ

Abstract

Underlying cosmologies with deceleration parameter, $q_0=-0.51_{-0.24}^{+0.03},$ may be interpreted as having $q_0=-0.55,$ on the basis of weak gravitational lensing effects.

Published 2001, Astronomical Society of the Pacific, Conference Series, 237, 363-4