Astron. Astrophys. Suppl. Ser.
Volume 138, Number 3, September 1999Gamma-Ray Bursts in the Afterglow Era Contents Rome, November 3-6, 1998
|Page(s)||531 - 532|
|Published online||15 September 1999|
Gamma-ray bursts vs. afterglows
Department of Physics and McDonnell Center for the Space Sciences, Washington University, St. Louis, MO. 63130, U.S.A.
Send offprint request to: J.I. Katz
Accepted: 12 March 1999
When does a GRB stop and its afterglow begin? A GRB may be defined as emission by internal shocks and its afterglow as emission by an external shock, but it is necessary to distinguish them observationally. With these definitions irregularly varying emission (at any frequency) must be the GRB, but smoothly varying intensity is usually afterglow. The GRB itself and its afterglow may overlap in time and in frequency, and distinguishing them will, in general, require detailed modeling.
Key words: gamma-ray bursts / shock waves
© European Southern Observatory (ESO), 1999