Astronomy Astrophysics manuscript no. March 7, 2002

Astronomy and Astrophysics

We present a short re–evaluation of a recently published time delay estimate for the gravitational lens system HE 1104–1805 with emphasis on important methodological aspects: bias of the statistics, inconsistency of the methods and use of the purposeful selection of data points (or so–called " cleaning ") at the preprocessing stage. We show how the inadequate use of simple analysis methods can ...

Astronomy Astrophysics manuscript no.

Astronomy Astrophysics manuscript no. H4001 February 17, 2003

Astronomy and Astrophysics Correcting for Lensing Bias in the Hubble Diagram

Gravitational lensing will cause a dispersion in the Hubble diagram for high redshift sources. This effect will introduce a bias in the cosmological parameter determination using the distance-redshift relation for Type Ia supernovae. In this note we show how one can diagnose and correct for this bias when doing precision cosmology with supernovae. A&A manuscript no. (will be inserted by hand la...

Near-horizon solution for Dvali-Gabadadze-Porrati perturbations

Ignacy Sawicki, Yong-Seon Song, and Wayne Hu* Kavli Institute for Cosmological Physics, Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA Department of Physics, University of Chicago, Chicago, Illinois 60637, USA Department of Astronomy & Astrophysics, University of Chicago, Chicago, Illinois 60637, USA (Received 13 June 2006; revised manuscript received 5 January 2007...