Table 1: Giant burst properties.
Object SGR 0526-66 SGR 1900+14
Active periods 1979-83 1979, 1992, 1998-99
Giant Burst 5 March 1979 27 August 1998
Precursor:    
Duration, s No data $\sim$0.05
kT (keV)   $\sim$20
Hard $\gamma$-ray spike:    
Duration, s $\sim$0.25 $\sim$0.35
Peak luminosity, erg s-1 $1.6 \times 10^{45}$ $\ga$ $3.7 \times 10^{44}$
Energy release, erg $1.3 \times 10^{44}$ $\ga$ $6.8 \times 10^{43}$
kT (keV) $\sim$246 $\sim$240
Bright X-ray emission:    
Duration, s $\sim$180 $\sim$370
Pulsation period, s 8.1 5.16
Energy release, erg $3.6 \times 10^{44}$ $ 5.2 \times 10^{43}$
kT (keV) $\sim$30 evolves, $31.2 \rightarrow 28.9$
Data sources: Cline et al. (1980); Fenimore et al. (1996); Feroci et al. (2001); Hurley et al. (1999a); Ibrahim et al. (2001); Mazets et al. (1999). "No data'' means that Mazets et al. 1979 have not plotted any data for the last second before the burst (the time resolution for their observations of the pre-burst background is apparently >1 s).


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