2010AJ....140..518P

Query : 2010AJ....140..518P

2010AJ....140..518P - Astron. J., 140, 518-532 (2010/August-0)

Real-time analysis and selection biases in the supernova legacy survey.

PERRETT K., BALAM D., SULLIVAN M., PRITCHET C., CONLEY A., CARLBERG R., ASTIER P., BALLAND C., BASA S., FOUCHEZ D., GUY J., HARDIN D., HOOK I.M., HOWELL D.A., PAIN R. and REGNAULT N.

Abstract (from CDS):

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 ∼ 0.6, with a significant shift in the average magnitude of the spectroscopically confirmed SN Ia sample toward brighter values for z ≳ 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.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - methods: data analysis - supernovae: general - surveys - techniques: photometric

CDS comments: In paragraph 3.3 SNLS 03D4aa, 04D4jv and 06D4dv not identified and not found in Balland et al. 2009.

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	SNLS 04D2ca	SN*	10 01 20.487	+02 20 21.68						SNIa	4	1

Query : 2010AJ....140..518P

Basic data :

SNLS 04D2ca -- SuperNova
Other object types:	`SN* (SNLS)`
ICRS coord. (ep=J2000) :	`10 01 20.487 +02 20 21.68 (Optical) [ ] C 2010A&A...523A...7G`
FK4 coord. (ep=B1950 eq=1950) :	`09 58 45.308 +02 34 49.71 [ ]`
Gal coord. (ep=J2000) :	`236.844752 +42.375043 [ ]`
Radial velocity / Redshift / cz :	`V(km/s) 162500 [300] / z(spectroscopic) 0.835 [0.001] / cz 250327 [300] D 2009A&A...507...85B`
Spectral type:	`SNIa C` `2010A&A...523A...7G`

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SNLS 04D2ca

References (4 between 1850 and 2026) (Total 4)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Data at NED - NASA/IPAC Extragalactic Database : SNLS 04D2ca

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