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

18.1k citations

Showing 2000Show all

33 papers · 1 filter

astro-ph2000★ 12 cited

Far Ultraviolet Spectra of B Stars near the Ecliptic

C. Morales, V. Orozco, J. F. Gomez +7

Spectra of B stars in the wavelength range of 911-1100 A have been obtained with the EURD spectrograph onboard the Spanish satellite MINISAT-01 with ~5 A spectral resolution. IUE s…

astro-ph2000★ 1 cited

Heating the Quiet Corona by Nanoflares: Evidence and Problems

Arnold O. Benz, Sam Krucker

The content of coronal material in the quiet Sun is not constant as soft X-ray and high-temperature EUV line observations have shown. New material, probably heated and evaporated f…

astro-ph2000★ 250 cited

Observation of X-ray lines from a Gamma-Ray Burst (GRB991216): Evidence of Moving Ejecta from the Progenitor

L. Piro, G. Garmire, M. Garcia +18

We report on the discovery of two emission features observed in the X-ray spectrum of the afterglow of the gamma-ray burst (GRB) of 16 Dec. 1999 by the Chandra X-Ray Observatory. T…

astro-ph2000★ 24 cited

Extreme Ultraviolet Emission from Abell 4059

Thomas W. Berghoefer, Stuart Bowyer, Eric Korpela

We present the results of a search for Extreme Ultraviolet emission in A4059, a cluster with an X-ray emitting cluster gas. Our analysis of Extreme Ultraviolet Explorer (EUVE) Deep…

astro-ph2000★ 536 cited

X-ray Imaging Spectroscopy of Abell 1835

J. R. Peterson, F. B. S. Paerels, J. S. Kaastra +6

We present detailed spatially-resolved spectroscopy results of the observation of Abell 1835 using the European Photon Imaging Cameras (EPIC) and the Reflection Grating Spectromete…

astro-ph2000★ 160 cited

The Giant Flare of 1998 August 27 from SGR 1900+14: I. An Interpretive Study of BeppoSAX and Ulysses Observations

M. Feroci, K. Hurley, R. Duncan +1

The giant flare of 1998 August 27 from SGR 1900+14 was extraordinary in many ways: it was the most intense flux of gamma rays ever detected from a source outside our solar system;…

astro-ph2000★ 50 cited

The Effects of Rotation on the Evolution of Rising Omega-loops in a Stratified Model Convection Zone

W. P. Abbett, G. H. Fisher, Y. Fan

We present three-dimensional MHD simulations of buoyant magnetic flux tubes that rise through a stratified model convection zone in the presence of solar rotation. The equations of…

astro-ph2000★ 42 cited

Diffraction-limited near-IR imaging at Keck reveals asymmetric, time-variable nebula around carbon star CIT 6

J. D. Monnier, P. G. Tuthill, W. C. Danchi

We present multi-epoch, diffraction-limited images of the nebula around the carbon star CIT 6 at 2.2 microns and 3.1 microns from aperture masking on the Keck-I telescope. The near…

astro-ph2000★ 56 cited

The very red afterglow of GRB 000418 - further evidence for dust extinction in a GRB host galaxy

S. Klose, B. Stecklum, N. Masetti +36

We report near-infrared and optical follow-up observations of the afterglow of the Gamma-Ray Burst 000418 starting 2.5 days after the occurrence of the burst and extending over nea…

astro-ph2000★ 78 cited

Mid-infrared interferometry on spectral lines: III. Ammonia and Silane around IRC+10216 and VY CMa

J. D. Monnier, W. C. Danchi, D. S. Hale +2

Using the U.C. Berkeley Infrared Spatial Interferometer with an RF filterbank, the first interferometric observations of mid-infrared molecular absorption features of ammonia (NH_3…

astro-ph2000★ 46 cited

Mid-infrared interferometry on spectral lines: II. Continuum (dust) emission around IRC+10216 and VY CMa

J. D. Monnier, W. C. Danchi, D. S. Hale +3

The U. C. Berkeley Infrared Spatial Interferometer has measured the mid-infrared visibilities of the carbon star IRC+10216 and the red supergiant VY CMa. The dust shells around the…

astro-ph2000★ 11 cited

Mid-infrared interferometry on spectral lines: I. Instrumentation

J. D. Monnier, W. Fitelson, W. C. Danchi +1

The U. C. Berkeley Infrared Spatial Interferometer has been outfitted with a filterbank system to allow interferometric observations of mid-infrared spectral lines with very high s…

astro-ph2000★ 17 cited

X-ray afterglow detection of the short gamma-ray burst 991014

J. J. M. in 't Zand, L. Kuiper, L. Amati +14

GRB 991014 is one of the shortest gamma-ray bursts detected so far with the Wide Field Cameras aboard BeppoSAX, both in gamma-rays and X-rays. The duration is 9.6 sec in 2-28 keV a…

astro-ph2000★ 10 cited

HST/STIS observations of GRB000301C: CCD imaging and NUV MAMA spectroscopy

A. Smette, A. S. Fruchter, T. R. Gull +24

We present HST/STIS observations of the optical counterpart (OT) of the gamma-ray burster GRB 000301C obtained on 2000 March 6, five days after the burst. CCD clear aperture imagin…

astro-ph2000★ 474 cited

On-Orbit Performance of the Far Ultraviolet Spectroscopic Explorer (FUSE) Satellite

D. J. Sahnow, H. W. Moos, T. Ake +38

Launch of the Far Ultraviolet Spectroscopic Explorer (FUSE) has been followed by an extensive period of calibration and characterization as part of the preparation for normal satel…

astro-ph2000★ 665 cited

Overview of the Far Ultraviolet Spectroscopic Explorer Mission

H. W. Moos

The Far Ultraviolet Spectroscopic Explorer satellite observes light in the far-ultraviolet spectral region, 905 - 1187 A with high spectral resolution. The instrument consists of f…

astro-ph2000★ 103 cited

A Jet Model for the Afterglow Emission from GRB000301C

E. Berger, R. Sari, D. A. Frail +11

We present broad-band radio observations of the afterglow of GRB000301C, spanning from 1.4 to 350 GHz for the period of 3 to 83 days after the burst. This radio data, in addition t…

astro-ph2000★ 119 cited

The afterglow of the short/intermediate-duration gamma-ray burst GRB 000301C: A jet at z=2.04

B. L. Jensen, J. U. Fynbo, J. Gorosabel +23

We present Ulysses and NEAR data from the detection of the short or intermediate duration (2 s) gamma-ray burst GRB000301C (2000 March 1.41 UT). The gamma-ray burst (GRB) was local…

astro-ph2000★ 53 cited

Constraints on Cosmological Parameters from MAXIMA-1

A. Balbi, P. Ade, J. Bock +16

We set new constraints on a seven-dimensional space of cosmological parameters within the class of inflationary adiabatic models. We use the angular power spectrum of the cosmic mi…

astro-ph2000★ 1.3k cited

MAXIMA-1: A Measurement of the Cosmic Microwave Background Anisotropy on angular scales of 10 arcminutes to 5 degrees

S. Hanany, P. Ade, A. Balbi +19

We present a map and an angular power spectrum of the anisotropy of the cosmic microwave background (CMB) from the first flight of MAXIMA. MAXIMA is a balloon-borne experiment with…

astro-ph2000★ 93 cited

The Ionization of the Local Interstellar Medium, as Revealed by FUSE Observations of N, O and Ar toward White Dwarf Stars

E. B. Jenkins, W. R. Oegerle, C. Gry +10

FUSE spectra of the white dwarf stars G191-B2B, GD 394, WD 2211-495 and WD 2331-475 cover the absorption features out of the ground electronic states of N I, N II, N III, O I and A…

astro-ph2000★ 52 cited

Timing Noise in SGR 1806-20

Peter M. Woods, Chryssa Kouveliotou, Mark H. Finger +9

We have phase connected a sequence of RXTE PCA observations of SGR 1806-20 covering 178 days. We find a simple secular spin-down model does not adequately fit the data. The period…

astro-ph2000★ 95 cited

The Three-dimensional Evolution of Rising, Twisted Magnetic Flux Tubes in a Gravitationally Stratified Model Convection Zone

W. P. Abbett, G. H. Fisher, Y. Fan

We present three-dimensional numerical simulations of the rise and fragmentation of twisted, initially horizontal magnetic flux tubes which evolve into emerging Omega-loops. The fl…

astro-ph2000★ 8 cited

Temporal Evolution of X-ray Lags in Cygnus X-1

K. Pottschmidt, J. Wilms, M. A. Nowak +3

We present the long term evolution of the frequency-dependent X-ray time lags of the black hole candidate Cygnus X-1 as measured in 1996 and 1998 with the Rossi X-ray Timing Explor…