Giannios 2010 部分BATSE的暴可能是磁星的一个super falre

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Title:		Superflares from magnetars revealing the GRB central engine
Authors:		Giannios, Dimitrios
Affiliation:		AA(Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USA; )
Publication:		Monthly Notices of the Royal Astronomical Society: Letters, Volume 403, Issue 1, pp. L51-L53. (MNRAS Homepage)
Publication Date:		03/2010
Origin:		WILEY
MNRAS Keywords:		magnetic fields, stars: neutron, gamma-rays: bursts
DOI:		10.1111/j.1745-3933.2010.00813.x
Bibliographic Code:		2010MNRAS.403L..51G

Abstract

Long-duration gamma-ray bursts (GRBs) may be powered by the rotational energy of a millisecond magnetar. I argue that the GRB-driving magnetars lie at the high end of the distribution of magnetic field strengths of magnetars. The field of GRB magnetars decays on time-scale of hundreds of years and can power soft gamma-ray repeater (SGR)-like flares up to ~100 times more powerful than the 2004 event of SGR 1806-20. A few of these flares per year may have been observed by the Burst and Transient Source Experiment (BATSE) and classified as short-duration GRBs. Association of one of these superflares with a nearby d_L <~ 250 Mpc galaxy and the discovery of a, coincident in space, 100-yr-old GRB afterglow (observed in the radio) will be the characteristic signature of the magnetar model for GRBs.

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