The X-ray afterglow flat segment in short GRB 051221A: Energy injection from a millisecond magnetar?
arXiv:astro-ph/0605445 · doi:10.1111/j.1745-3933.2006.00217.x
Abstract
The flat segment lasting seconds in the X-ray afterglow of GRB051221A represents the first clear case of strong energy injection in the external shock of a short GRB afterglow. In this work, we show that a millisecond pulsar with dipole magnetic field Gauss could well account for that energy injection. The good quality X-ray flat segment thus suggests that the central engine of this short burst may be a millisecond magnetar.
4 pages including 1 figure, accepted for publication in MNRAS Letters, minor revision
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