output
19922026
most citedMeasurements of Omega and Lambda from 42 High-Redshift Supernovae

18.1k citations

Showing 2004 · astro-phShow all

18 papers · 2 filters

astro-ph2004★ 153 cited

H.E.S.S. Observations of PKS 2155-304

The H. E. S. S. Collaboration, :, F. Aharonian

The high-frequency peaked BL Lac PKS 2155-304 at redshift z=0.117 has been detected with high significance (~45 sigma) at energies greater than 160 GeV, using the H.E.S.S. stereosc…

astro-ph2004★ 509 cited

High-energy particle acceleration in the shell of a supernova remnant

H. E. S. S. Collaboration, :, F. Aharonian

A significant fraction of the energy density of the interstellar medium is in the form of high-energy charged particles (cosmic rays). The origin of these particles remains uncerta…

astro-ph2004★ 56 cited

The CMB temperature power spectrum from an improved analysis of the Archeops data

M. Tristram, G. Patanchon, J. F. Macias-Perez +47

We present improved results on the measurement of the angular power spectrum of the Cosmic Microwave Background (CMB) temperature anisotropies using the data from the last Archeops…

astro-ph2004★ 4 cited

A method of generating initial conditions for cosmological N body simulations

M. Joyce, D. Levesque, B. Marcos

We investigate the possibility of generating initial conditions for cosmological N-body simulations by simulating a system whose correlations at thermal equilibrium approximate wel…

astro-ph2004★ 42 cited

Spectroscopic confirmation of high-redshift supernovae with the ESO VLT

C. Lidman, D. A. Howell, G. Folatelli +44

We present VLT FORS1 and FORS2 spectra of 39 candidate high-redshift supernovae that were discovered as part of a cosmological study using Type Ia supernovae (SNe Ia) over a wide r…

astro-ph2004★ 25 cited

Extracting clean supernova spectra

S. Blondin, J. R. Walsh, B. Leibundgut +1

We use a new technique to extract the spectrum of a supernova from that of the contaminating background of its host galaxy, and apply it to the specific case of high-redshift Type…

astro-ph2004★ 124 cited

Type IIP Supernovae as Cosmological Probes: A SEAM Distance to SN 1999em

E. Baron, Peter Nugent, David Branch +1

Due to their intrinsic brightness, supernovae make excellent cosmological probes. We describe the SEAM method for obtaining distances to Type IIP supernovae (SNe IIP) and present a…

astro-ph2004★ 46 cited

Quantification of discreteness effects in cosmological N-body simulations: I. Initial Conditions

Michael Joyce, Bruno Marcos

The relation between the results of cosmological N-body simulations, and the continuum theoretical models they simulate, is currently not understood in a way which allows a quantif…

astro-ph2004★ 123 cited

The Trigger System of the H.E.S.S. Telescope Array

S. Funk, G. Hermann, J. Hinton +6

H.E.S.S. -- The High Energy Stereoscopic System-- is a new system of large atmospheric Cherenkov telescopes for GeV/TeV Gamma-ray astronomy. This paper describes the trigger system…

astro-ph2004★ 19 cited

Co-moving frame radiative transfer in spherical media with arbitrary velocity fields

E. Baron, Peter H. Hauschildt

Recently, with the advances in computational speed and availability there has been a growth in the number and resolution of fully 3-D hydrodynamical simulations. However, all of th…

astro-ph2004★ 404 cited

Very high energy gamma rays from the direction of Sagittarius A*

H. E. S. S. Collaboration, :, F. Aharonian

We report the detection of a point-like source of very high energy (VHE) gamma-rays coincident within 1' of Sgr A*, obtained with the H.E.S.S. array of Cherenkov telescopes. The ga…

astro-ph2004★ 358 cited

Calibration of cameras of the H.E.S.S. detector

H. E. S. S. Collaboration, :, F. Aharonian

H.E.S.S. - the High Energy Stereoscopic System- is a new system of large atmospheric Cherenkov telescopes for GeV/TeV astronomy. Each of the four telescopes of 107 m^2 mirror area…

astro-ph2004★ 31 cited

EROS 2 photometry of probable R Coronae Borealis stars in the Small Magellanic Cloud

P. Tisserand, J. B. Marquette, J. P. Beaulieu +1

EROS 2 (Experience de Recherche d'Objets Sombres) conducted a survey of the SMC between July 1996 and February 2003 in two EROS broad-band colours, V_E and R_E. The photometric dat…

astro-ph2004★ 76 cited

Type Ia supernova rate at a redshift of ~ 0.1

G. Blanc, C. Afonso, C. Alard +58

We present the type Ia rate measurement based on two EROS supernova search campaigns (in 1999 and 2000). Sixteen supernovae identified as type Ia were discovered. The measurement o…

astro-ph2004★ 121 cited

Spectroscopic Observations and Analysis of the Peculiar SN 1999aa

G. Garavini, G. Folatelli, A. Goobar +55

We present an extensive new time-series of spectroscopic data of the peculiar SN 1999aa in NGC 2595. Our data set includes 25 optical spectra between -11 and +58 days with respect…

astro-ph2004★ 17 cited

Angular Power Spectrum Estimation of Cosmic Ray Anisotropies with Full or Partial Sky Coverage

O. Deligny, E. Armengaud, T. Beau +5

We study the angular power spectrum estimate in order to search for large scale anisotropies in the arrival directions distribution of the highest-energy cosmic rays. We show that…

astro-ph2004★ 68 cited

The Nearby Supernova Factory

W. M. Wood-Vasey, G. Aldering, B. C. Lee +19

The Nearby Supernova Factory (SNfactory) is an ambitious project to find and study in detail approximately 300 nearby Type Ia supernovae (SNe~Ia) at redshifts 0.03<z<0.08. This pro…

astro-ph2004★ 31 cited

Improved discretization of the wavelength derivative term in CMF operator splitting numerical radiative transfer

Peter H. Hauschildt, E. Baron

We describe two separate wavelength discretization schemes that can be used in the numerical solution of the comoving frame radiative transfer equation. We present an improved seco…