@article{085f05b840ac4a76a93fe471c4698400,
title = "Shading and smothering of gamma-ray bursts",
abstract = "GRB 980425 is distinctive in that it seems to be associated with SN 1998bw, has no X-ray afterglow, and has a rounded, structureless, single-peak light curve and a relatively soft spectrum. The supernova is itself unusual in that its expansion velocity exceeds c/6. We suggest that many of these features can be accounted for with the hypothesis that we observe the gamma-ray burst along a penumbral line of sight that contains mainly photons that have scattered off ejected baryons. The hypothesis suggests a baryon-poor jet existing within a baryon-rich outflow. The sharp distinction can be attributed to whether or not the magnetic field lines thread an event horizon. Such a configuration suggests that there will be some nonthermal acceleration of pickup ex-neutrons within the baryon-poor jet. This scenario might produce observable spallation products and neutrinos.",
keywords = "Gamma rays: bursts, Gamma rays: observations, Gamma rays: theory",
author = "David Eichler and Amir Levinson",
note = "Funding Information: A. L. acknowledges support by the Alon Fellowship and a grant from the Israel Science Foundation. D. E. acknowledges a grant from the Israel Science Foundation. We are grateful to L. Drury, E. Waxman, L. Rozdolskaya, and V. Usov for helpful conversations. We thank B. Paczy{\'n}ski for calling to our attention the paper of Nakamura (1998).",
year = "1999",
month = aug,
day = "20",
doi = "10.1086/312187",
language = "אנגלית",
volume = "521",
pages = "L117--L120",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "American Astronomical Society",
number = "2 PART 2",
}