R
R. A. Knop
Researcher at Lawrence Berkeley National Laboratory
Publications - 24
Citations - 20684
R. A. Knop is an academic researcher from Lawrence Berkeley National Laboratory. The author has contributed to research in topics: Supernova & Light curve. The author has an hindex of 15, co-authored 24 publications receiving 19057 citations. Previous affiliations of R. A. Knop include Drexel University & Vanderbilt University.
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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
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
The unusual afterglow of the γ-ray burst of 26 March 1998 as evidence for a supernova connection
Joshua S. Bloom,Shrinivas R. Kulkarni,S. G. Djorgovski,A. C. Eichelberger,Patrick Cote,John P. Blakeslee,Stephen C. Odewahn,Fiona A. Harrison,Dale A. Frail,Alexei V. Filippenko,Douglas C. Leonard,Adam G. Riess,H. Spinrad,Daniel Stern,Andrew Bunker,Arjun Dey,B. Grossan,Saul Perlmutter,R. A. Knop,I. M. Hook,M. Feroci +20 more
TL;DR: In this paper, it was shown that the transient optical source associated with the gamma-ray burst brightened to about 60 times the expected flux, based upon an extrapolation of the initial light curve.
Journal ArticleDOI
Timescale stretch parameterization of Type Ia supernova B-band light curves
Gerson Goldhaber,Gerson Goldhaber,Donald E. Groom,A. G. Kim,Greg Aldering,Pierre Astier,A. Conley,Susana E. Deustua,Richard S. Ellis,Richard S. Ellis,Sebastien Fabbro,A. S. Fruchter,Ariel Goobar,I. M. Hook,Mike Irwin,M. Y. Kim,R. A. Knop,Christopher Lidman,Richard G. McMahon,Peter Nugent,Reynald Pain,Nino Panagia,C. R. Pennypacker,C. R. Pennypacker,Saul Perlmutter,Saul Perlmutter,Pilar Ruiz-Lapuente,Bradley E. Schaefer,Bradley E. Schaefer,Nicholas A. Walton,T. York +30 more
TL;DR: In this paper, the authors used the Cosmology Project (SCP) to fit R-band intensity measurements along the light curve of Type Ia supernovae to templates allowing a free parameter the time-axis width factor w identically equal to s times (1+z).
Journal ArticleDOI
Spectroscopic observations and analysis of the peculiar SN 1999aa
G. Garavini,Gastón Folatelli,Ariel Goobar,S. Nobili,Greg Aldering,Greg Aldering,Alexis Amadon,Rahman Amanullah,Pierre Astier,Christophe Balland,Christophe Balland,G. Blanc,G. Blanc,M. S. Burns,A. Conley,A. Conley,A. Conley,Tomas Dahlen,Susana E. Deustua,Susana E. Deustua,Richard S. Ellis,Sebastien Fabbro,Xiaohui Fan,Brenda Frye,E. L. Gates,R. Gibbons,Gerson Goldhaber,Gerson Goldhaber,Bertrand Goldman,Donald E. Groom,J. Haissinski,D. Hardin,I. M. Hook,Dale Andrew Howell,Daniel Kasen,Steve Kent,Alex G. Kim,R. A. Knop,Brian C. Lee,Christopher Lidman,Javier Méndez,G. J. Miller,G. J. Miller,M. Moniez,A. Mourao,Heidi Jo Newberg,Peter Nugent,Reynald Pain,O. Perdereau,Saul Perlmutter,V. Prasad,Robert Quimby,J. Raux,N. Regnault,Jeffrey A. Rich,Gordon T. Richards,Pilar Ruiz-Lapuente,G. Sainton,Bradley E. Schaefer,K. Schahmaneche,E. Smith,A. L. Spadafora,Vallery Stanishev,Nicholas A. Walton,L. Wang,W. M. Wood-Vasey,W. M. Wood-Vasey +66 more
TL;DR: In this paper, an extensive time series of spectroscopic data of the peculiar SN 1999aa in NGC 2595 is presented, including 25 optical spectra between -11 and +58 days with respect to B-band maximum light, providing an unusually complete time history.