标题： INTEGRAL对软γ重复源SGR 1806-20两年的监测：从平静到狂热 显示英文标题

标题： Two years of INTEGRAL monitoring of the Soft Gamma-Ray Repeater SGR 1806-20: from quiescence to frenzy

摘要： SGR 1806-20 已经使用INTEGRAL卫星观测了两年以上。在此期间，该源从平静状态转变为非常活跃的状态，并在2004年12月27日达到一次巨大的耀发。在这里，我们报告了在巨大耀发之前通过INTEGRAL探测到的所有短时爆发的特性。我们推导出它们的数量-强度分布，并确认了Gotz等人（2004a）发现的耀发的硬度-强度相关性。我们的样本包括一个非常明亮的爆发，它发生在2004年10月5日，在这期间的10分钟内发生了超过一百次的爆发，涉及的能量释放为3×1E42尔格。我们对其进行了详细分析，并在磁星模型框架下讨论了我们的结果。 显示英文摘要

摘要： SGR 1806-20 has been observed for more than 2 years with the INTEGRAL satellite. In this period the source went from a quiescent state into a very active one culminating in a giant flare on December 27 2004. Here we report on the properties of all the short bursts detected with INTEGRAL before the giant flare. We derive their number-intensity distribution and confirm the hardness-intensity correlation for the bursts found by Gotz et al. (2004a). Our sample includes a very bright outburst that occurred on October 5 2004, during which over one hundred bursts were emitted in 10 minutes, involving an energy release of 3 x 1E42 erg. We present a detailed analysis of it and discuss our results in the framework of the magnetar model.