# AN r-PROCESS KILONOVA ASSOCIATED WITH THE SHORT-HARD GRB 130603B

@article{Berger2013ANRK,
title={AN r-PROCESS KILONOVA ASSOCIATED WITH THE SHORT-HARD GRB 130603B},
author={Edo Berger and Wen-fai Fong and Ryan Chornock},
journal={The Astrophysical Journal Letters},
year={2013},
volume={774}
}
• Published 17 June 2013
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We present ground-based optical and Hubble Space Telescope (HST) optical and near-IR observations of the short-hard GRB 130603B at z = 0.356, which demonstrate the presence of excess near-IR emission matching the expected brightness and color of an r-process powered transient (a “kilonova”). The early afterglow fades rapidly with α ≲ −2.6 at t ≈ 8–32 hr post-burst and has a spectral index of β ≈ −1.5 (Fν∝tανβ), leading to an expected near-IR brightness at the time of the first HST observation…
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