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19912026
Showing 2002 · astro-phShow all

29 papers · 2 filters

astro-ph2002★ 139 cited

The Hubble Diagram of Type Ia Supernovae as a Function of Host Galaxy Morphology

M. Sullivan, R. S. Ellis, G. Aldering +41

(Abridged) We present new results on the Hubble diagram of distant type Ia supernovae (SNe Ia) segregated according to the type of host galaxy. This makes it possible to check earl…

astro-ph2002★ 2 cited

Indirect searches for neutralino dark matter

Joakim Edsjo

There is mounting evidence for dark matter in the Universe and one of the favourite dark matter candidates is the neutralino, which naturally appears as the lightest supersymmetric…

astro-ph2002★ 4 cited

Physics and Operation of the AMANDA-II High Energy Neutrino Telescope

Steven W. Barwick

This paper briefly describes the principle of operation and science goals of the AMANDA high energy neutrino telescope located at the South Pole, Antarctica. Results from an earlie…

astro-ph2002★ 1 cited

The positron excess and supersymmetric dark matter

Edward A. Baltz, Joakim Edsjo, Katherine Freese +1

Using a new instrument, the HEAT collaboration has confirmed the excess of cosmic ray positrons that they first detected in 1994. We explore the possibility that this excess is due…

astro-ph2002★ 46 cited

DarkSUSY - A numerical package for supersymmetric dark matter calculations

Paolo Gondolo, Joakim Edsjo, Piero Ullio +3

The question of the nature of dark matter in the Universe remains one of the most outstanding unsolved problems in basic science. One of the best motivated particle physics candida…

astro-ph2002★ 14 cited

Massive galaxy clusters as gravitational telescopes for distant supernovae

Christofer Gunnarsson, Ariel Goobar

We investigate the potential of using massive clusters as gravitational telescopes for searches and studies of supernovae of Type Ia and Type II in optical and near-infrared bands…

astro-ph2002

Wide-Field Surveys from the SNAP Mission

A. Kim

The Supernova/Acceleration Probe (SNAP) is a proposed space-borne observatory that will survey the sky with a wide-field optical/near-infrared (NIR) imager. The images produced by…

astro-ph2002★ 11 cited

SNAP Focal Plane

M. Lampton, C. J. Bebek

The proposed SuperNova/Acceleration Probe (SNAP) mission will have a two-meter class telescope delivering diffraction-limited images to an instrumented 0.7 square-degree field sens…

astro-ph2002

Determining Bolometric Corrections for BATSE Burst Observations

Luis Borgonovo, Felix Ryde, Miguel de Val Borro +1

We compare the energy and count fluxes obtained by integrating over the finite bandwidth of BATSE with a measure proportional to the bolometric energy flux, the phi-measure, introd…

astro-ph2002★ 1 cited

Effects of halo triaxiality, anisotropy and small scale clumping on WIMP direct detection exclusion limits

Anne M Green

Weakly Interacting Massive Particle (WIMP) direct detection experiments are closing in on the region of parameter space where neutralinos may constitute the Galactic halo dark matt…

astro-ph2002★ 125 cited

IceCube - the next generation neutrino telescope at the South Pole

A. Karle

IceCube is a large neutrino telescope of the next generation to be constructed in the Antarctic Ice Sheet near the South Pole. We present the conceptual design and the sensitivity…

astro-ph2002★ 67 cited

Overview of the SuperNova/Acceleration Probe (SNAP)

G. Aldering, SNAP collaboration

The SuperNova / Acceleration Probe (SNAP) is a space-based experiment to measure the expansion history of the Universe and study both its dark energy and the dark matter. The exper…

astro-ph2002★ 94 cited

Effect of halo modelling on WIMP exclusion limits

Anne M Green

WIMP direct detection experiments are just reaching the sensitivity required to detect galactic dark matter in the form of neutralinos. Data from these experiments are usually anal…

astro-ph2002★ 46 cited

Search for Point Sources of High Energy Neutrinos with AMANDA

J. Ahrens, X. Bai, G. Barouch +1

This paper describes the search for astronomical sources of high-energy neutrinos using the AMANDA-B10 detector, an array of 302 photomultiplier tubes, used for the detection of Ch…

astro-ph2002★ 86 cited

The Type Ia Supernova 1999aw: a Probable 1999aa-like Event In a Low-Luminosity Host Galaxy

L. -G. Strolger, R. C. Smith, N. B. Suntzeff +39

SN 1999aw was discovered during the first campaign of the Nearby Galaxies Supernova Search (NGSS) project. This luminous, slow-declining (Delta m_{15} (B) = 0.81 \pm 0.03) Type Ia…

astro-ph2002★ 55 cited

Cosmological parameters from lensed supernovae

A. Goobar, E. Mortsell, R. Amanullah +1

We investigate the possibility of measuring the Hubble constant, the fractional energy density components and the equation of state parameter of the ``dark energy'' using lensed mu…

astro-ph2002★ 320 cited

Cosmological dark matter annihilations into gamma-rays - a closer look

Piero Ullio, Lars Bergstrom, Joakim Edsjo +1

We investigate the prospects of detecting weakly interacting massive particle (WIMP) dark matter by measuring the contribution to the extragalactic gamma-ray radiation induced, in…

astro-ph2002★ 48 cited

Search for Neutrino-Induced Cascades with the AMANDA Detector

J. Ahrens

We report on a search for electromagnetic and/or hadronic showers (cascades) induced by a diffuse flux of neutrinos with energies between 5 TeV and 300 TeV from extraterrestrial so…

astro-ph2002★ 57 cited

SNOC: a Monte-Carlo simulation package for high-z supernova observations

A. Goobar, E. Mortsell, R. Amanullah +3

We present a Monte-Carlo package for simulation of high-redshift supernova data, SNOC. Optical and near-infrared photons from supernovae are ray-traced over cosmological distances…

astro-ph2002★ 114 cited

The distant Type Ia supernova rate

R. Pain, S. Fabbro, M. Sullivan +26

We present a measurement of the rate of distant Type Ia supernovae derived using 4 large subsets of data from the Supernova Cosmology Project. Within this fiducial sample, which su…

astro-ph2002★ 88 cited

Observation of High Energy Atmospheric Neutrinos with the Antarctic Muon and Neutrino Detector Array

AMANDA Collaboration, J. Ahrens

The Antarctic Muon and Neutrino Detector Array (AMANDA) began collecting data with ten strings in 1997. Results from the first year of operation are presented. Neutrinos coming thr…

astro-ph2002★ 209 cited

Probing the dark side: Constraints on the dark energy equation of state from CMB, large scale structure and Type Ia supernovae

Steen Hannestad, Edvard Mortsell

We have reanalysed constraints on the equation of state parameter, w_Q = P/rho, of the dark energy, using several cosmological data sets and relaxing the usual constraint w_Q > -1.…

astro-ph2002★ 25 cited

Correcting for lensing bias in the Hubble diagram

R. Amanullah, E. Mortsell, A. Goobar

Gravitational lensing will cause a dispersion in the Hubble diagram for high redshift sources. This effect will introduce a bias in the cosmological parameter determination using t…

astro-ph2002★ 12 cited

Are there MACHOs in the Milky Way halo?

Anne M Green, Karsten Jedamzik

Microlensing searches aim to detect compact halo dark matter via its gravitational lensing effect on stars within the Large Magellanic Cloud. The most recent results have led to th…