Snapshot Distances to Type Ia Supernovae -- All in ``One'' Night's Work
Astrophysics
2009-10-30 v1
Abstract
We present an empirical method which measures the distance to a Type Ia supernova (SN Ia) with a precision of ~ 10% from a single night's data. This method measures the supernova's age and luminosity/light-curve parameter from a spectrum, and the extinction and distance from an apparent magnitude and color. We are able to verify the precision of this method from error propagation calculations, Monte Carlo simulations of well-sampled SNe Ia, and the Hubble diagram of scarcely observed supernovae. With the reduction in telescope time needed, this method is three to four times more efficient for measuring cosmological parameters than conventional light-curve based distance estimates.
Keywords
Cite
@article{arxiv.astro-ph/9804065,
title = {Snapshot Distances to Type Ia Supernovae -- All in ``One'' Night's Work},
author = {Adam G. Riess and Peter Nugent and Alexei V. Filippenko and Robert P. Kirshner and Saul Perlmutter},
journal= {arXiv preprint arXiv:astro-ph/9804065},
year = {2009}
}
Comments
32 pages, 5 figures, Accepted Astrophysical Journal