M. Sullivan
University of Southampton
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Featured researches published by M. Sullivan.
Astronomy and Astrophysics | 2006
Pierre Astier; J. Guy; Nicolas Regnault; R. Pain; E. Aubourg; D. D. Balam; S. Basa; R. G. Carlberg; S. Fabbro; D. Fouchez; I. M. Hook; D. A. Howell; H. Lafoux; James D. Neill; N. Palanque-Delabrouille; K. Perrett; C. J. Pritchet; J. Rich; M. Sullivan; R. Taillet; G. Aldering; P. Antilogus; V. Arsenijevic; C. Balland; S. Baumont; J. Bronder; Herve Courtois; Richard S. Ellis; M. Filiol; A. C. Goncalves
We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color light-curves measured using the MegaPrime/MegaCam instrument at the Canada-France-Hawaii Telescope (CFHT), by repeatedly imaging four one-square degree fields in four bands. Follow-up spectroscopy was performed at the VLT, Gemini and Keck telescopes to confirm the nature of the supernovae and to measure their redshift. With this data set, we have built a Hubble diagram extending to z = 1, with all distance measurements involving at least two bands. Systematic uncertainties are evaluated making use of the multiband photometry obtained at CFHT. Cosmological fits to this first year SNLS Hubble diagram give the following results: {Omega}{sub M} = 0.263 {+-} 0.042 (stat) {+-} 0.032 (sys) for a flat {Lambda}CDM model; and w = -1.023 {+-} 0.090 (stat) {+-} 0.054 (sys) for a flat cosmology with constant equation of state w when combined with the constraint from the recent Sloan Digital Sky Survey measurement of baryon acoustic oscillations.
The Astrophysical Journal | 2003
Robert Andrew Knop; Isobel M. Hook; C. Lidman; Bradley E. Schaefer; A. Conley; B.C. Lee; Andrew S. Fruchter; Ariel Goobar; Nino Panagia; M. Sullivan; Gaston Folatelli; S. Nobili; G. Goldhaber; V. Stanishev; Sebastien Fabbro; William Michael Wood-Vasey; G. Sainton; Guillaume Blanc; Eric P. Smith; J. Raux; Nancy A. Walton; G. Garavini; A. G. Kim; Rachel Annette Gibbons; Mamoru Doi; Juan E. Mendez; P. Astier; Carlton R. Pennypacker; K. Garton; G. Aldering
We report measurements of
Astronomy and Astrophysics | 2014
M. Betoule; Richard Kessler; J. Guy; Jennifer J. Mosher; D. Hardin; Rahul Biswas; P. Astier; P. El-Hage; M. Konig; S. E. Kuhlmann; John P. Marriner; R. Pain; Nicolas Regnault; C. Balland; Bruce A. Bassett; Peter J. Brown; Heather Campbell; R. G. Carlberg; F. Cellier-Holzem; D. Cinabro; A. Conley; C. B. D'Andrea; D. L. DePoy; Mamoru Doi; Richard S. Ellis; S. Fabbro; A. V. Filippenko; Ryan J. Foley; Joshua A. Frieman; D. Fouchez
\Omega_M
Astronomy and Astrophysics | 2007
J. Guy; Pierre Astier; S. Baumont; D. Hardin; R. Pain; Nicolas Regnault; S. Basa; R. G. Carlberg; A. Conley; S. Fabbro; D. Fouchez; I. M. Hook; D. A. Howell; K. Perrett; C. J. Pritchet; J. Rich; M. Sullivan; P. Antilogus; E. Aubourg; G. Bazin; J. Bronder; M. Filiol; N. Palanque-Delabrouille; P. Ripoche; V. Ruhlmann-Kleider
,
Nature | 2006
D. Andrew Howell; M. Sullivan; Peter Edward Nugent; Richard S. Ellis; A. Conley; Damien Le Borgne; Raymond G. Carlberg; Julien Guy; D. D. Balam; S. Basa; Dominique Fouchez; Isobel M. Hook; E. Y. Hsiao; James D. Neill; Reynald Pain; Kathryn M. Perrett; Christopher J. Pritchet
\Omega_\Lambda
The Astrophysical Journal | 2003
R. A. Knop; G. Aldering; Rahman Amanullah; P. Astier; G. Blanc; M. S. Burns; A. Conley; S. E. Deustua; Mamoru Doi; Richard S. Ellis; Sebastien Fabbro; G. Folatelli; Andrew S. Fruchter; G. Garavini; S. Garmond; K. Garton; Robert D. Gibbons; G. Goldhaber; Ariel Goobar; Donald E. Groom; D. Hardin; I. M. Hook; Dale Andrew Howell; A. G. Kim; Ben Lee; C. Lidman; J. Mendez; S. Nobili; P. Nugent; R. Pain
, and w from eleven supernovae at z=0.36-0.86 with high-quality lightcurves measured using WFPC-2 on the HST. This is an independent set of high-redshift supernovae that confirms previous supernova evidence for an accelerating Universe. Combined with earlier Supernova Cosmology Project data, the new supernovae yield a flat-universe measurement of the mass density
The Astrophysical Journal | 2007
E. Y. Hsiao; A. Conley; D. A. Howell; M. Sullivan; C. J. Pritchet; R. G. Carlberg; Peter E. Nugent; Mark M. Phillips
\Omega_M=0.25^{+0.07}_{-0.06}
ieee international symposium on fault tolerant computing | 1992
M. Sullivan; Ram Chillarege
(statistical)
The Astrophysical Journal | 2005
D. A. Howell; M. Sullivan; K. Perrett; T. J. Bronder; I. M. Hook; P. Astier; E. Aubourg; D. D. Balam; S. Basa; R. G. Carlberg; Sebastien Fabbro; D. Fouchez; J. Guy; H. Lafoux; James D. Neill; R. Pain; N. Palanque-Delabrouille; C. J. Pritchet; Nicolas Regnault; J. Rich; Richard Taillet; R. A. Knop; Richard G. McMahon; S. Perlmutter; Nancy A. Walton
\pm0.04
The Astrophysical Journal | 2001
M. Sullivan; B. Mobasher; Ben Chan; L. E. Cram; Richard S. Ellis; Marie Treyer; Andrew M. Hopkins
(identified systematics), or equivalently, a cosmological constant of
