Supernova Spectroscopy and Cosmology from the Dark Energy Survey
Transient and Time Domain Astronomy: Robotic telescopes, surveys and the evolution of transient phenomena
Date Submitted
2016-04-08 15:50:39
Chris D'Andrea
University of Southampton
Mathew Smith, Mark Sullivan (University of Southampton), Bob Nichol (University of Portsmouth), and the Dark Energy Survey Collaboration
The Dark Energy Survey Supernova Program (DES-SN) is a five year, 27 square
degree cadenced search for type Ia supernovae (SNe Ia) using the Dark Energy
Camera on the 4m Blanco Telescope. DES-SN will accurately measure and
photometrically-classify more than 3000 SNe Ia in griz over a redshift range of
0.1 LT z LT 1.2, deriving from this sample the most precise constraints for
cosmological parameters of any supernova survey prior to LSST. I will present
the results of the spectroscopic followup program from the first three years of
DES-SN, including classifications, spectroscopic efficiencies, biases, and
example spectra and light curves illustrating the data quality of the program. I
will show how these objects compare with the photometric sample, and present
the first spectroscopic Hubble Diagram from DES-SN, consisting of >200 SN Ia
out to redshift z=0.85.
Schedule
id
date time
09:00 - 10:30
09:00
Abstract
Supernova Spectroscopy and Cosmology from the Dark Energy Survey