SN 1996 cr：确认圆规星系中有一颗发光的IIn型超新星
SN 1996cr: Confirmation of a Luminous Type IIn Supernova in the Circinus Galaxy
摘要：
我们最近通过VLT光谱学证实SN 1996 cr是一颗晚时间的IIn型超新星（SN），并使用存档光学成像将其爆炸日期分离为约1年。我们在这里简要地谈到了丰富的光学，X射线和无线电档案观测这个神秘的来源。由于它的相对接近（3.8 +/-0.6 Mpc），SN 1996 cr是有史以来探测到的最明亮的X射线和射电超新星之一，因此，它可能提供对IIn型超新星结构和组成的有力见解。我们还发现SN 1996 cr与GRB 4 B 960202在2-3 sigma置信水平上相匹配，这可能是第三个与II型SN显著相关的GRB。我们推测SN 1996 cr是否可能是一个离轴或“失败”的GRB。
英文摘要：
We have recently confirmed SN 1996cr as a late-time type IIn supernova (SN) via VLT spectroscopy and isolated its explosion date to ~1 yr using archival optical imaging. We briefly touch upon here the wealth of optical, X-ray, and radio archival observations available for this enigmatic source. Due to its relative proximity (3.8 +/-0.6 Mpc), SN 1996cr ranks among the brightest X-ray and radio SNe ever detected and, as such, may offer powerful insights into the structure and composition of type IIn SNe. We also find that SN 1996cr is matched to GRB 4B 960202 at a 2-3 sigma confidence level, making it perhaps the third GRB to be significantly associated with a type II SN. We speculate on whether SN 1996cr could be an off-axis or ``failed'' GRB.
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