Real-time Analysis and Selection Biases in the Supernova Legacy Survey - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




Real-time Analysis and Selection Biases in the Supernova Legacy Survey - Astrophysics > Cosmology and Nongalactic Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: The Supernova Legacy Survey SNLS has produced a high-quality, homogeneoussample of Type Ia supernovae SNe Ia out to redshifts greater than z=1. In itsfirst four years of full operation to June 2007, the SNLS discovered morethan 3000 transient candidates, 373 of which have been confirmedspectroscopically as SNe Ia. Use of these SNe Ia in precision cosmologycritically depends on an analysis of the observational biases incurred in theSNLS survey due to the incomplete sampling of the underlying SN Ia population.This paper describes our real-time supernova detection and analysis procedures,and uses detailed Monte Carlo simulations to examine the effects of Malmquistbias and spectroscopic sampling. Such sampling effects are found to becomeapparent at z~0.6, with a significant shift in the average magnitude of thespectroscopically confirmed SN Ia sample towards brighter values for z>0.75. Wedescribe our approach to correct for these selection biases in our three-yearSNLS cosmological analysis SNLS3, and present a breakdown of the systematicuncertainties involved.



Autor: K. Perrett, D. Balam, M. Sullivan, C. Pritchet, A. Conley, R. Carlberg, P. Astier, C. Balland, S. Basa, D. Fouchez, J. Guy, D. Ha

Fuente: https://arxiv.org/







Documentos relacionados