B
Bradley E. Schaefer
Researcher at Louisiana State University
Publications - 326
Citations - 49175
Bradley E. Schaefer is an academic researcher from Louisiana State University. The author has contributed to research in topics: Gamma-ray burst & Light curve. The author has an hindex of 54, co-authored 317 publications receiving 45426 citations. Previous affiliations of Bradley E. Schaefer include University of Texas at Austin & Universities Space Research Association.
Papers
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Journal ArticleDOI
Measurements of Omega and Lambda from 42 High-Redshift Supernovae
Saul Perlmutter,Saul Perlmutter,Greg Aldering,Gerson Goldhaber,Gerson Goldhaber,R. A. Knop,Peter Nugent,P. G. Castro,P. G. Castro,Susana E. Deustua,Sebastien Fabbro,Sebastien Fabbro,A. Goobar,A. Goobar,Donald E. Groom,I. M. Hook,I. M. Hook,A. G. Kim,A. G. Kim,A. G. Kim,M. Y. Kim,Julia C. Lee,Julia C. Lee,Nelson J. Nunes,Nelson J. Nunes,Reynald Pain,Reynald Pain,C. R. Pennypacker,C. R. Pennypacker,Robert Quimby,Christopher Lidman,Richard S. Ellis,Mike Irwin,Richard G. McMahon,Pilar Ruiz-Lapuente,Nicholas A. Walton,Bradley E. Schaefer,B. J. Boyle,Alexei V. Filippenko,Thomas Matheson,A. S. Fruchter,Nino Panagia,Nino Panagia,Heidi Jo Newberg,Warrick J. Couch +44 more
TL;DR: In this paper, the mass density, Omega_M, and cosmological-constant energy density of the universe were measured using the analysis of 42 Type Ia supernovae discovered by the Supernova Cosmology project.
Journal ArticleDOI
Measurements of Omega and Lambda from 42 High-Redshift Supernovae
Saul Perlmutter,Greg Aldering,G. Goldhaber,R. A. Knop,Peter Nugent,P. G. Castro,Susana E. Deustua,Sebastien Fabbro,A. Goobar,D. E. Groom,I. M. Hook,A. G. Kim,M. Y. Kim,Julia C. Lee,Nelson J. Nunes,Reynald Pain,C. R. Pennypacker,R. M. Quimby,C. Lidman,Richard S. Ellis,Michael G. Irwin,Richard G. McMahon,P. Ruiz-Lapuente,Nicholas A. Walton,Bradley E. Schaefer,B. J. Boyle,Alexei V. Filippenko,Thomas Matheson,A. S. Fruchter,Nino Panagia,Heidi Jo Newberg,W. J. Couch +31 more
TL;DR: In this paper, the mass density, Omega_M, and cosmological-constant energy density of the universe were measured by the analysis of 42 Type Ia supernovae discovered by the Supernova Cosmology Project.
Journal ArticleDOI
The Swift Gamma-Ray Burst Mission
Neil Gehrels,G. Chincarini,G. Chincarini,Paolo Giommi,Keith O. Mason,John A. Nousek,Alan A. Wells,Nicholas E. White,S. D. Barthelmy,David N. Burrows,L. R. Cominsky,Kevin Hurley,F. E. Marshall,Peter Mészáros,Peter W. A. Roming,Lorella Angelini,Lorella Angelini,L. M. Barbier,Tomaso Belloni,Sergio Campana,P. A. Caraveo,M. M. Chester,O. Citterio,T. L. Cline,Mark Cropper,Jay Cummings,Jay Cummings,A. J. Dean,Eric D. Feigelson,E. E. Fenimore,Dale A. Frail,A. S. Fruchter,Gordon P. Garmire,Keith C. Gendreau,Gabriele Ghisellini,Jochen Greiner,Joanne E. Hill,S. D. Hunsberger,Hans A. Krimm,Hans A. Krimm,Shrinivas R. Kulkarni,Pawan Kumar,F. Lebrun,Nicole M. Lloyd-Ronning,Craig B. Markwardt,Craig B. Markwardt,Barbara J. Mattson,Barbara J. Mattson,Richard Mushotzky,Jay P. Norris,J. P. Osborne,Bohdan Paczynski,David Palmer,H.-S. Park,A. M. Parsons,J. A. Paul,Martin J. Rees,Christopher S. Reynolds,James E. Rhoads,T. P. Sasseen,Bradley E. Schaefer,A. Short,Alan P. Smale,Alan P. Smale,Ian Smith,Luigi Stella,Gianpiero Tagliaferri,Tadayuki Takahashi,Makoto Tashiro,Leisa K. Townsley,Jack Tueller,Martin J. L. Turner,M. Vietri,Wolfgang Voges,Martin Ward,Richard Willingale,F. M. Zerbi,W. W. Zhang +77 more
TL;DR: The Swift mission as discussed by the authors is a multi-wavelength observatory for gamma-ray burst (GRB) astronomy, which is a first-of-its-kind autonomous rapid-slewing satellite for transient astronomy and pioneers the way for future rapid-reaction and multiwavelength missions.
Journal ArticleDOI
Discovery of a supernova explosion at half the age of the Universe
Saul Perlmutter,Saul Perlmutter,Greg Aldering,M. Della Valle,S. Deustua,S. Deustua,Richard S. Ellis,Sebastien Fabbro,Andrew S. Fruchter,Gerson Goldhaber,Gerson Goldhaber,Donald E. Groom,I. M. Hook,A. G. Kim,A. G. Kim,M. Y. Kim,R. A. Knop,Christopher Lidman,Richard G. McMahon,Peter Nugent,Reynald Pain,Nino Panagia,C. R. Pennypacker,C. R. Pennypacker,Pilar Ruiz-Lapuente,Bradley E. Schaefer,N. A. Walton +26 more
TL;DR: The most distant spectroscopically confirmed supernova was reported in this paper, and it was found to be similar to nearby type Ia supernovae, which suggests that we may live in a low-mass-density universe.
Journal ArticleDOI
New Constraints on ΩM, ΩΛ, and w from an Independent Set of 11 High-Redshift Supernovae Observed with the Hubble Space Telescope*
R. A. Knop,R. A. Knop,Greg Aldering,Greg Aldering,Rahman Amanullah,Pierre Astier,G. Blanc,G. Blanc,M. S. Burns,A. Conley,A. Conley,Susana E. Deustua,Susana E. Deustua,Mamoru Doi,Richard S. Ellis,Sebastien Fabbro,Sebastien Fabbro,Gastón Folatelli,A. S. Fruchter,G. Garavini,S. Garmond,S. Garmond,K. Garton,R. Gibbons,Gerson Goldhaber,Gerson Goldhaber,Ariel Goobar,Donald E. Groom,Donald E. Groom,D. Hardin,I. M. Hook,Dale Andrew Howell,A. G. Kim,A. G. Kim,Brian C. Lee,Christopher Lidman,Javier Méndez,S. Nobili,Peter Nugent,Peter Nugent,Reynald Pain,Nino Panagia,C. R. Pennypacker,Saul Perlmutter,Robert Quimby,J. Raux,N. Regnault,N. Regnault,Pilar Ruiz-Lapuente,G. Sainton,Bradley E. Schaefer,K. Schahmaneche,E. Smith,A. L. Spadafora,Vallery Stanishev,Mark Sullivan,Mark Sullivan,Nicholas A. Walton,Lifan Wang,W. M. Wood-Vasey,W. M. Wood-Vasey,Naoki Yasuda +61 more
TL;DR: In this paper, a set of high-redshift supernovae were used to confirm previous supernova evidence for an accelerating universe, and the supernova results were combined with independent flat-universe measurements of the mass density from CMB and galaxy redshift distortion data, they provided a measurement of $w=-1.05^{+0.15}-0.09$ if w is assumed to be constant in time.