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Spectroscopy of High-Redshift Supernovae from the ESSENCE Project: The First Two Years
T. Matheson, S. Blondin, R. J. Foley +28
We present the results of spectroscopic observations of targets discovered during the first two years of the ESSENCE project. The goal of ESSENCE is to use a sample of ~200 Type Ia…
The binary progenitor of Tycho Brahe's 1572 supernova
Pilar Ruiz-Lapuente, Fernando Comeron, Javier Mendez +8
The brightness of type Ia supernovae, and their homogeneity as a class, makes them powerful tools in cosmology, yet little is known about the progenitor systems of these explosions…
The Hubble Higher-Z Supernova Search: Supernovae to z=1.6 and Constraints on Type Ia Progenitor Models
L. -G. Strolger, A. G. Riess, T. Dahlen +33
We present results from the Hubble Higher-z Supernova Search, the first space-based open field survey for supernovae (SNe). In cooperation with the Great Observatories Origins Deep…
Discovery and Evolution of an Unusual Luminous Variable Star in NGC 3432 (Supernova 2000ch)
R. M. Wagner, F. J. Vrba, A. A. Henden +15
We present photometric and spectroscopic observations of SN 2000ch, an unusual and extremely luminous variable star located in the galaxy NGC 3432. The object was discovered on 200…