K CORRECTIONS FOR TYPE IA SUPERNOVAE AND A TEST FOR SPATIAL VARIATION OF THE HUBBLE CONSTANT The Supernova Cosmology Project: II

/ Authors

A. Kim, S. Deustua, S. Gabi, G. Goldhaber, D. Groom, I. Hook, M. Kim, Julia C. Lee, R. Pain, C. Pennypacker

and 16 more authors

S. Perlmutter, I. Small, A. Goobar, R. Ellis, K. Glazebrook, R. Mcmahon, B. Boyle, P. Bunclark, D. Carter, M. Irwin, H. Newberg, A. Filippenko, T. Matheson, M. Dopita, J. Mould, W. Couch

/ Abstract

Cross-filter K corrections for a sample of "normal" Type Ia supernovae (SNe) have been calculated for a range of epochs. With appropriate filter choices, the combined statistical and systematic K correction dispersion of the full sample lies within 0.05 mag for redshifts z<0.7. This narrow dispersion of the calculated K correction allows the Type Ia to be used as a cosmological probe. We use the K corrections with observations of seven SNe at redshifts 0.3 < z <0.5 to bound the possible difference between the locally measured Hubble constant (H_L) and the true cosmological Hubble constant (H_0).