A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT
We use the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) to reduce the uncertainty in the local value of the Hubble constant from 3.3% to 2.4%. The bulk of this improvement comes…
Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
- M. Betoule, R. Kessler, C. Wheeler
- Physics
- 16 January 2014
Aims. We present cosmological constraints from a joint analysis of type Ia supernova (SN Ia) observations obtained by the SDSS-II and SNLS collaborations. The dataset includes several low-redshift…
Nearby Supernova Rates from the Lick Observatory Supernova Search. II. The Observed Luminosity Functions and Fractions of Supernovae in a Complete Sample
- Weidong Li, J. Leaman, China Miller Fellow Rutgers Clay Fellow
- Physics
- 23 June 2010
This is the second paper of a series in which we present new measurements of the observed rates of supernovae (SNe) in the local Universe, determined from the Lick Observatory Supernova Search…
The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample
- D. Scolnic, D. Jones, K. Smith
- PhysicsAstrophysical Journal
- 2 October 2017
We present optical light curves, redshifts, and classifications for spectroscopically confirmed Type Ia supernovae (SNe Ia) discovered by the Pan-STARRS1 (PS1) Medium Deep Survey. We detail…
A PHOTOMETRIC REDSHIFT OF z ∼ 9.4 FOR GRB 090429B
- A. Cucchiara, A. Levan, P. D’Avanzo
- Physics
- 25 May 2011
Gamma-ray bursts (GRBs) serve as powerful probes of the early universe, with their luminous afterglows revealing the locations and physical properties of star-forming galaxies at the highest…
Swope Supernova Survey 2017a (SSS17a), the optical counterpart to a gravitational wave source
- D. Coulter, R. Foley, C. Rojas-Bravo
- PhysicsScience
- 16 October 2017
A rapid astronomical search located the optical counterpart of the neutron star merger GW170817 and shows how these observations can be explained by an explosion known as a kilonova, which produces large quantities of heavy elements in nuclear reactions.
FIRST-YEAR SLOAN DIGITAL SKY SURVEY-II SUPERNOVA RESULTS: HUBBLE DIAGRAM AND COSMOLOGICAL PARAMETERS
- R. Kessler, A. Becker, D. York
- Physics
- 28 August 2009
We present measurements of the Hubble diagram for 103 Type Ia supernovae (SNe) with redshifts 0.04 < z < 0.42, discovered during the first season (Fall 2005) of the Sloan Digital Sky Survey-II…
A γ-ray burst at a redshift of z ≈ 8.2
Long-duration γ-ray bursts (GRBs) are thought to result from the explosions of certain massive stars, and some are bright enough that they should be observable out to redshifts of z > 20 using…
IMPROVED DISTANCES TO TYPE Ia SUPERNOVAE WITH TWO SPECTROSCOPIC SUBCLASSES
- X. Wang, A. Filippenko, D. S. Wong
- Physics
- 9 June 2009
We study the observables of 158 relatively normal Type Ia supernovae (SNe Ia) by dividing them into two groups in terms of the expansion velocity inferred from the absorption minimum of the Si ii…
The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. II. UV, Optical, and Near-infrared Light Curves and Comparison to Kilonova Models
- P. Cowperthwaite, E. Berger, J. Zuntz
- Physics
- 16 October 2017
We present UV, optical, and near-infrared (NIR) photometry of the first electromagnetic counterpart to a gravitational wave source from Advanced Laser Interferometer Gravitational-wave Observatory…
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