SN 2006aj and the Nature of Low-Luminosity Gamma-Ray Bursts
SN 2006aj and the Nature of Low-Luminosity Gamma-Ray Bursts
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DOI：
10.1086/506271
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发表时间：
2006-03
期刊：
影响因子：
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通讯作者：
B. Cobb;C. Bailyn;P. G. V. Dokkum;Priya Natarajan
中科院分区：
文献类型：
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作者：
B. Cobb;C. Bailyn;P. G. V. Dokkum;Priya Natarajan
我们展示了与 GRB 060218 相关的 SN 2006aj 的 SMARTS 联盟光学/红外光曲线。我们发现该事件与之前观测到的两个事件 SN 1998bw/GRB 980425 和 SN 2003lw/GRB 031203 大致相似。特别是，与典型的长持续时间 GRB 相比，所有这些事件的伽马射线亮度都非常低。我们发现，即使斯威夫特观测到一个这样的事件，也意味着足够大的真实事件发生率，这给将这些事件解释为离轴观测到的典型伽玛暴造成了困难。因此，这些事件似乎与高光度伽马射线暴有着本质上的不同，而且比高光度伽马射线暴更为常见，后者已被大量观测到红移至少为 6.3。伽玛暴一系列固有能量的存在可能会给使用伽玛暴作为标准烛光带来挑战。
We present SMARTS consortium optical/IR light curves of SN 2006aj, associated with GRB 060218. We find that this event is broadly similar to two previously observed events, SN 1998bw/GRB 980425 and SN 2003lw/GRB 031203. In particular, all of these events are greatly underluminous in gamma rays compared with typical long-duration GRBs. We find that the observation by Swift of even one such event implies a large enough true event rate to create difficulties in interpreting these events as typical GRBs observed off-axis. Thus, these events appear to be intrinsically different from and much more common than high-luminosity GRBs, which have been observed in large numbers out to a redshift of at least 6.3. The existence of a range of intrinsic energies of GRBs may present challenges to using GRBs as standard candles.