R. A. Covarrubias

TL;DR: In this article, the authors present a new compilation of Type Ia supernovae (SNe Ia), a new dataset of low-redshift nearby-Hubble-flow SNe and new analysis procedures to work with these heterogeneous compilations.

TL;DR: In this article, a set of constraints on the dark energy equation-of-state parameter w =P/(rho c^2) were derived for 60 Type Ia supernovae from the ESSENCE supernova survey.

TL;DR: In this paper, the authors modeled the light curves and spectra of the explosion of a 26 \M\ star successfully fit the observations and showed that the explosion occurred about 50 days before discovery, and that a plateau probably followed.

TL;DR: The Dark Energy Survey (DES) is a five-year optical imaging campaign with the goal of understanding the origin of cosmic acceleration as discussed by the authors, which performs a 5000 square degree survey of the southern sky in five optical bands (g,r,i,z,Y) to a depth of ~24th magnitude.

TL;DR: In this article, the authors reported the successful identification of the type of supernova responsible for the supernova remnant SNR 0509-675 in the Large Magellanic Cloud (LMC) using Gemini spectra of surrounding light echoes.