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Spectroscopy of High-Redshift Supernovae from the ESSENCE Project: The First Four Years
R. J. Foley, T. Matheson, S. Blondin +23
We present the results of spectroscopic observations from the ESSENCE high-redshift supernova (SN) survey during its first four years of operation. This sample includes spectra of…
Supernova Cosmology and the ESSENCE project
Jesper Sollerman, Claudio Aguilera, Andy Becker +27
The proper usage of Type Ia supernovae (SNe Ia) as distance indicators has revolutionized cosmology, and added a new dominant component to the energy density of the Universe, dark…
The Rate of Type Ia Supernovae at High Redshift
Brian J. Barris, John L. Tonry
We derive the rates of Type Ia supernovae (SNIa) over a wide range of redshifts using a complete sample from the IfA Deep Survey. This sample of more than 100 SNIa is the largest s…
Hubble Space Telescope Observations of Nine High-Redshift ESSENCE Supernovae
Kevin Krisciunas, Peter M. Garnavich, Peter Challis +29
We present broad-band light curves of nine supernovae ranging in redshift from 0.5 to 0.8. The supernovae were discovered as part of the ESSENCE project, and the light curves are a…
The NN2 Flux Difference Method for Constructing Variable Object Light Curves
Brian J. Barris, John L. Tonry, Megan C. Novicki +1
We present a new method for optimally extracting point-source time variability information from a series of images. Differential photometry is generally best accomplished by subtra…
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…