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Observations of GX 339-4 in 1996
I. A. Smith, E. P. Liang, D. Lin +9
GX 339-4 is an unusual black hole candidate in that it is a persistent source, being detected by X-ray telescopes most of the time, but it also has nova-like flaring states. In 199…
Late-Time Optical and UV Spectra of SN 1979C and SN 1980K
Robert A. Fesen, Christopher L. Gerardy, Alexei V. Filippenko +8
A low-dispersion Keck I spectrum of SN 1980K taken in August 1995 (t = 14.8 yr after explosion) and a November 1997 MDM spectrum (t = 17.0 yr) show broad 5500 km s^{-1} emission li…
Hubble Space Telescope WFPC2 Imaging of SN 1979C and Its Environment
Schuyler D. Van Dyk, Chien Y. Peng, Aaron J. Barth +6
The locations of supernovae in the local stellar and gaseous environment in galaxies contain important clues to their progenitor stars. As part of a program to study the environmen…
Results from the High-Z Supernova Search Team
Alexei V. Filippenko, Adam G. Riess
We review the use of Type Ia supernovae for cosmological distance determinations. Low-redshift SNe Ia () demonstrate that (a) the Hubble expansion is linear, (b) $H…
Supernova Limits on the Cosmic Equation of State
P. M. Garnavich, S. Jha, P. Challis +18
We use Type Ia supernovae studied by the High-Z Supernova Search Team to constrain the properties of an energy component which may have contributed to accelerating the cosmic expan…
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
Adam G. Riess, Alexei V. Filippenko, Peter Challis +17
We present observations of 10 type Ia supernovae (SNe Ia) between 0.16 < z < 0.62. With previous data from our High-Z Supernova Search Team, this expanded set of 16 high-redshift s…