REAL-TIME ANALYSIS AND SELECTION BIASES IN THE SUPERNOVA LEGACY SURVEY

被引：53
作者：
Perrett, K. [1 ,2 ]
Balam, D. [3 ]
Sullivan, M. [4 ]
Pritchet, C. [5 ]
Conley, A. [1 ,6 ]
Carlberg, R. [1 ]
Astier, P. [7 ,8 ,9 ]
Balland, C. [7 ,8 ,9 ]
Basa, S. [10 ]
Fouchez, D. [11 ,12 ]
Guy, J. [7 ,8 ,9 ]
Hardin, D. [7 ,8 ,9 ]
Hook, I. M. [3 ,13 ]
Howell, D. A. [14 ,15 ]
Pain, R. [7 ,8 ,9 ]
Regnault, N. [7 ,8 ,9 ]
机构：
[1] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada
[2] DRDC Ottawa, Network Informat Operat, Ottawa, ON K1A 0Z4, Canada
[3] Herzberg Inst Astrophys, Dominion Astrophys Observ, Victoria, BC V9E 2E7, Canada
[4] Univ Oxford, Dept Phys Astrophys, DWB, Oxford OX1 3RH, England
[5] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, Canada
[6] Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA
[7] Univ Paris 06, F-75005 Paris, France
[8] Univ Paris 07, F-75005 Paris, France
[9] CNRS IN2P3, LPNHE, F-75005 Paris, France
[10] Astrophys Lab, F-13388 Marseille 13, France
[11] Univ Aix Marseille 2, F-13288 Marseille 9, France
[12] CNRS IN2P3, CPPM, F-13288 Marseille 9, France
[13] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, RM, Italy
[14] Las Cumbres Observ Global Telescope Network, Goleta, CA 93117 USA
[15] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA
来源：
ASTRONOMICAL JOURNAL | 2010年 / 140卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
cosmology: observations; methods: data analysis; supernovae: general; surveys; techniques: photometric; DIGITAL SKY SURVEY; FRANCE-HAWAII-TELESCOPE; IA SUPERNOVAE; STANDARD STARS; HUBBLE DIAGRAM; HOST GALAXIES; DARK ENERGY; SYSTEM; MASS; CONSTRAINTS;
D O I：
10.1088/0004-6256/140/2/518
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The Supernova Legacy Survey (SNLS) has produced a high-quality, homogeneous sample of Type Ia supernovae (SNe Ia) out to redshifts greater than z = 1. In its first four years of full operation (to 2007 June), the SNLS discovered more than 3000 transient candidates, 373 of which have been spectroscopically confirmed as SNe Ia. Use of these SNe Ia in precision cosmology critically depends on an analysis of the observational biases incurred in the SNLS 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 Malmquist bias and spectroscopic sampling. Such sampling effects are found to become apparent at z similar to 0.6, with a significant shift in the average magnitude of the spectroscopically confirmed SN Ia sample toward brighter values for z greater than or similar to 0.75. We describe our approach to correct for these selection biases in our three-year SNLS cosmological analysis (SNLS3) and present a breakdown of the systematic uncertainties involved.
引用
收藏
页码：518 / 532
页数：15
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