P. S. Bunclark
University of Cambridge
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by P. S. Bunclark.
The Astrophysical Journal | 1997
S. Perlmutter; Silvia Gabi; G. Goldhaber; A. Goobar; D. E. Groom; I. M. Hook; A. G. Kim; M. Y. Kim; J. C. Lee; R. Pain; Carlton R. Pennypacker; I. A. Small; Richard S. Ellis; Richard G. McMahon; B. J. Boyle; P. S. Bunclark; D. L. Carter; M. J. Irwin; Karl Glazebrook; H. Newberg; A. V. Filippenko; Thomas Matheson; Michael A. Dopita; Warrick J. Couch
We have developed a technique to systematically discover and study high-redshift supernovae that can be used to measure the cosmological parameters. We report here results based on the initial seven of more than 28 supernovae discovered to date in the high-redshift supernova search of the Supernova Cosmology Project. We find an observational dispersion in peak magnitudes of ? -->MB=0.27; this dispersion narrows to ?MB, corr=0.19 after correcting the magnitudes using the light-curve width-luminosity relation found for nearby (z ? 0.1) Type Ia supernovae from the Cal?n/Tololo survey (Hamuy et al.). Comparing light-curve width-corrected magnitudes as a function of redshift of our distant (z = 0.35-0.46) supernovae to those of nearby Type Ia supernovae yields a global measurement of the mass density, ?M
Archive | 1997
Saul Perlmutter; Silvia Gabi; G. Goldhaber; Ariel Goobar; Donald E. Groom; Isobel M. Hook; Alex G. Kim; Min Kook Kim; Janice C. Lee; R. Pain; Carlton R. Pennypacker; I. A. Small; Richard S. Ellis; Richard G. McMahon; B. J. Boyle; P. S. Bunclark; David Carter; M. J. Irwin; Karl Glazebrook; Heidi Jo Newberg; Alexei V. Filippenko; Thomas Matheson; Michael A. Dopita; Warrick J. Couch
{r M}
Proceedings of SPIE | 2004
M. J. Irwin; J. Lewis; Simon T. Hodgkin; P. S. Bunclark; D. W. Evans; Richard McMahon; James P. Emerson; Malcolm Stewart; Steven M. Beard
-->=0.88 -->+ 0.69?0.60 for a ? = 0 cosmology. For a spatially flat universe (i.e., ?M + ?? = 1), we find ?M
The Astrophysical Journal | 1996
R. Pain; I. M. Hook; S. Perlmutter; S. Deustua; S. Gabi; G. Goldhaber; D. Groom; A. Kim; Myung-Hee Yoon Kim; Julia C. Lee; C. R. Pennypacker; I. Small; Ariel Goobar; Richard S. Ellis; Richard McMahon; Karl Glazebrook; B. J. Boyle; P. S. Bunclark; D. L. Carter; M. J. Irwin
{r M}
New Astronomy Reviews | 2001
Richard G. McMahon; N.A Walton; M. J. Irwin; J. Lewis; P. S. Bunclark; D.H Jones
-->=0.94 -->+ 0.34?0.28 or, equivalently, a measurement of the cosmological constant, ??=0.06 -->+ 0.28?0.34 ( < 0.51 at the 95% confidence level). For the more general Friedmann-Lema?tre cosmologies with independent ?M and ??, the results are presented as a confidence region on the ?M-?? plane. This region does not correspond to a unique value of the deceleration parameter q0. We present analyses and checks for statistical and systematic errors and also show that our results do not depend on the specifics of the width-luminosity correction. The results for ??-versus-?M are inconsistent with ?-dominated, low-density, flat cosmologies that have been proposed to reconcile the ages of globular cluster stars with higher Hubble constant values.
The Astrophysical Journal | 1995
S. Perlmutter; M. Y. Kim; C. S. Crawford; R.S. Ellis; A.G. Kim; B. J. Boyle; Ariel Goobar; H.J.M. Newberg; I. A. Small; G. Goldhaber; W.J. Couch; K. Glazebrook; Richard A. Muller; Jeremy R. Mould; Carl R. Pennypacker; T.A. Small; Jaydev P. Desai; Richard G. McMahon; R.G. Abraham; P. S. Bunclark; M. J. Irwin; R.J. Terlevich; D. L. Carter
We have developed a technique to systematically discover and study high-redshift supernovae that can be used to measure the cosmological parameters. We report here results based on the initial seven of more than 28 supernovae discovered to date in the high-redshift supernova search of the Supernova Cosmology Project. We find an observational dispersion in peak magnitudes of ? -->MB=0.27; this dispersion narrows to ?MB, corr=0.19 after correcting the magnitudes using the light-curve width-luminosity relation found for nearby (z ? 0.1) Type Ia supernovae from the Cal?n/Tololo survey (Hamuy et al.). Comparing light-curve width-corrected magnitudes as a function of redshift of our distant (z = 0.35-0.46) supernovae to those of nearby Type Ia supernovae yields a global measurement of the mass density, ?M
Proceedings of SPIE | 2004
James P. Emerson; M. J. Irwin; J. Lewis; Simon T. Hodgkin; D. W. Evans; P. S. Bunclark; Richard McMahon; Nigel Hambly; Robert G. Mann; I. A. Bond; Eckhard Sutorius; Mike Read; P. M. Williams; A. Lawrence; Malcolm Stewart
{r M}
Astronomy and Astrophysics | 2017
F. van Leeuwen; D. W. Evans; F. De Angeli; C. Jordi; G. Busso; Carla Cacciari; M. Riello; E. Pancino; Giuseppe Altavilla; A. G. A. Brown; P. Burgess; J. M. Carrasco; G. Cocozza; S. Cowell; M. Davidson; F. De Luise; C. Fabricius; S. Galleti; G. Gilmore; G. Giuffrida; Nigel Hambly; D. Harrison; Simon T. Hodgkin; G. Holland; I. Macdonald; S. Marinoni; P. Montegriffo; P. Osborne; S. Ragaini; P. J. Richards
-->=0.88 -->+ 0.69?0.60 for a ? = 0 cosmology. For a spatially flat universe (i.e., ?M + ?? = 1), we find ?M
arXiv: Astrophysics | 1997
S. Perlmutter; S. Deustua; S. Gabi; G. Goldhaber; D. Groom; I. M. Hook; A. Kim; Myung-Hee Yoon Kim; Julia C. Lee; R. Pain; C. R. Pennypacker; I. Small; Ariel Goobar; Richard S. Ellis; Richard McMahon; B. J. Boyle; P. S. Bunclark; D. Carter; Karl Glazebrook; M. J. Irwin; Heidi Jo Newberg; Alexei V. Filippenko; T. Matheson; Michael A. Dopita; Jeremy R. Mould; Warrick J. Couch
{r M}
The Astrophysical Journal | 1997
A. G. Kim; S. Gabi; G. Goldhaber; Donald E. Groom; I. M. Hook; M. Y. Kim; J. C. Lee; Carlton R. Pennypacker; S. Perlmutter; I. A. Small; Ariel Goobar; R. Pain; Richard S. Ellis; Richard G. McMahon; B. J. Boyle; P. S. Bunclark; D. L. Carter; M. J. Irwin; Karl Glazebrook; Heidi Jo Newberg; A. V. Filippenko; Thomas Matheson; Michael A. Dopita; Warrick J. Couch
-->=0.94 -->+ 0.34?0.28 or, equivalently, a measurement of the cosmological constant, ??=0.06 -->+ 0.28?0.34 ( < 0.51 at the 95% confidence level). For the more general Friedmann-Lema?tre cosmologies with independent ?M and ??, the results are presented as a confidence region on the ?M-?? plane. This region does not correspond to a unique value of the deceleration parameter q0. We present analyses and checks for statistical and systematic errors and also show that our results do not depend on the specifics of the width-luminosity correction. The results for ??-versus-?M are inconsistent with ?-dominated, low-density, flat cosmologies that have been proposed to reconcile the ages of globular cluster stars with higher Hubble constant values.