K
Kathy Perrett
Researcher at Defence Research and Development Canada
Publications - 56
Citations - 7364
Kathy Perrett is an academic researcher from Defence Research and Development Canada. The author has contributed to research in topics: Supernova Legacy Survey & Supernova. The author has an hindex of 34, co-authored 56 publications receiving 6803 citations. Previous affiliations of Kathy Perrett include University of Toronto.
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Journal ArticleDOI
Supernova constraints and systematic uncertainties from the first three years of the supernova legacy survey
Alex Conley,Alex Conley,Julien Guy,Mark Sullivan,Nicolas Regnault,Pierre Astier,Christophe Balland,Christophe Balland,Stéphane Basa,Raymond G. Carlberg,Dominique Fouchez,D. Hardin,I. M. Hook,I. M. Hook,D. A. Howell,D. A. Howell,Reynald Pain,Nathalie Palanque-Delabrouille,Kathy Perrett,Kathy Perrett,C. J. Pritchet,Jeffrey A. Rich,V. Ruhlmann-Kleider,David D. Balam,S. Baumont,Richard S. Ellis,Richard S. Ellis,Sebastien Fabbro,Sebastien Fabbro,H. K. Fakhouri,N. Fourmanoit,Santiago González-Gaitán,Melissa L. Graham,Michael J. Hudson,Eric Hsiao,T. Kronborg,C. Lidman,A. Mourao,James D. Neill,Saul Perlmutter,Saul Perlmutter,P. Ripoche,P. Ripoche,Nao Suzuki,E. S. Walker +44 more
TL;DR: In this article, the authors combine high redshift Type Ia supernovae from the first 3 years of the Supernova Legacy Survey (SNLS) with other supernova (SN) samples, primarily at lower redshifts, to form a high-quality joint sample of 472 SNe (123 low-$z, 93 SDSS, 242 SNLS, and 14 {\it Hubble Space Telescope}).
Journal ArticleDOI
SALT2: using distant supernovae to improve the use of type Ia supernovae as distance indicators
Julien Guy,Pierre Astier,S. Baumont,D. Hardin,Reynald Pain,Nicolas Regnault,S. Basa,Raymond G. Carlberg,A. Conley,Sebastien Fabbro,Dominique Fouchez,I. M. Hook,D. A. Howell,Kathy Perrett,Christopher J. Pritchet,J. Rich,Mark Sullivan,P. Antilogus,Éric Aubourg,G. Bazin,J. Bronder,M. Filiol,Nathalie Palanque-Delabrouille,P. Ripoche,V. Ruhlmann-Kleider +24 more
TL;DR: In this paper, an empirical model of Type Ia supernovae spectro-photometric evolution with time is presented, which is built using a large data set including light-curves and spectra of both nearby and distant supernova, the latter being observed by the SNLS collaboration.
Journal ArticleDOI
The Supernova Legacy Survey 3-year sample: Type Ia supernovae photometric distances and cosmological constraints ,
Julien Guy,Mark Sullivan,Alex Conley,Alex Conley,Nicolas Regnault,Pierre Astier,Christophe Balland,Christophe Balland,Stéphane Basa,Raymond G. Carlberg,Dominique Fouchez,D. Hardin,I. M. Hook,I. M. Hook,D. A. Howell,D. A. Howell,Reynald Pain,Nathalie Palanque-Delabrouille,Kathy Perrett,Kathy Perrett,Christopher J. Pritchet,J. Rich,V. Ruhlmann-Kleider,David D. Balam,S. Baumont,Rowan Ellis,Rowan Ellis,Sebastien Fabbro,Sebastien Fabbro,H. K. Fakhouri,N. Fourmanoit,Santiago González-Gaitán,Melissa L. Graham,Eric Hsiao,T. Kronborg,C. Lidman,A. Mourao,Saul Perlmutter,P. Ripoche,P. Ripoche,Nao Suzuki,Emma S. Walker +41 more
TL;DR: In this paper, photometric properties and distance measurements of 252 high redshift Type Ia supernovae (0.15 < z < 1.1) were presented and their multi-colour light curves measured using the MegaPrime/MegaCam instrument at the Canada-France-Hawaii Telescope (CFHT).
Journal ArticleDOI
Rates and Properties of Type Ia Supernovae as a Function of Mass and Star Formation in Their Host Galaxies
Mark Sullivan,D. Le Borgne,Christopher J. Pritchet,A. Hodsman,James D. Neill,D. A. Howell,Raymond G. Carlberg,Pierre Astier,Éric Aubourg,David D. Balam,S. Basa,A. Conley,Sebastien Fabbro,D. Fouchez,Julien Guy,I. M. Hook,Reynald Pain,Nathalie Palanque-Delabrouille,Kathy Perrett,Nicolas Regnault,J. Rich,Richard Taillet,Richard Taillet,S. Baumont,J. Bronder,Rowan Ellis,M. Filiol,V. Lusset,Saul Perlmutter,P. Ripoche,Charling Tao +30 more
TL;DR: In this paper, the authors show that Type Ia supernovae are formed within both very young and old stellar populations, with observed rates that depend on the stellar mass and mean star formation rates (SFRs) of their host galaxies.
Journal ArticleDOI
SNLS3: Constraints on dark energy combining the supernova legacy survey three-year data with other probes
Mark Sullivan,Julien Guy,Alex Conley,Alex Conley,Nicolas Regnault,Pierre Astier,Christophe Balland,Christophe Balland,Stéphane Basa,Raymond G. Carlberg,Dominique Fouchez,D. Hardin,I. M. Hook,I. M. Hook,D. A. Howell,D. A. Howell,Reynald Pain,N. Palanque-Delabrouille,Kathy Perrett,Kathy Perrett,C. J. Pritchet,Jeffrey A. Rich,V. Ruhlmann-Kleider,David D. Balam,S. Baumont,Richard S. Ellis,Richard S. Ellis,Sebastien Fabbro,H. K. Fakhouri,N. Fourmanoit,Santiago González-Gaitán,Melissa L. Graham,Melissa L. Graham,Michael J. Hudson,Michael J. Hudson,Eric Hsiao,T. Kronborg,C. Lidman,A. Mourao,James D. Neill,Saul Perlmutter,Saul Perlmutter,P. Ripoche,P. Ripoche,Nao Suzuki,E. S. Walker +45 more
TL;DR: In this article, the authors present observational constraints on the nature of dark energy using the Supernova Legacy Survey three-year sample (SNLS3) of Guy et al. and Conley et al., and they find that the cosmological constraints derived from these different subsamples are consistent.