• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Subaru Hyper Suprime-Cam Survey for an optical counterpart of GW170817
【24h】

Subaru Hyper Suprime-Cam Survey for an optical counterpart of GW170817

机译：斯巴鲁GW170817光学对等机的超级Suprime-Cam测量

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We perform a z-band survey for an optical counterpart of the binary neutron star coalescence GW170817 with Subaru/Hyper Suprime-Cam. Our untargeted transient search covers 23.6?deg2 corresponding to the 56.6% credible region of GW170817 and reaches the 50% completeness magnitude of 20.6?mag on average. As a result, we find 60 candidate extragalactic transients, including J-GEM17btc (also known as SSS17a/DLT17ck). While J-GEM17btc is associated with NGC 4993, which is firmly located inside the 3D skymap of GW170817, the other 59 candidates do not have distance information in the GLADE v2 catalog or NASA/IPAC Extragalactic Database. Among 59 of the candidates, 58 are located at the center of extended objects in the Pan-STARRS1 catalog, while one candidate has an offset. We present location, z-band apparent magnitude, and time variability of the candidates and evaluate the probabilities that they are located within the 3D skymap of GW170817. The probability for J-GEM17btc is 64%, which is much higher than for the other 59 candidates (9.3?×?10?3–2.1?×?10?1%). Furthermore, the possibility that at least one of the other 59 candidates is located within the 3D skymap is only 3.2%. Therefore, we conclude that J-GEM17btc is the most likely and distinguished candidate to be the optical counterpart of GW170817.
机译：我们对具有斯巴鲁/超高级超级凸轮的二元中子星合并GW170817的光学对应物进行z波段测量。我们的非目标瞬态搜索覆盖了23.6？deg2，对应于GW170817的56.6％可信区域，平均完整性水平达到了20.6？mag的50％。结果，我们发现了60个候选河外瞬变，包括J-GEM17btc（也称为SSS17a / DLT17ck）。虽然J-GEM17btc与NGC 4993相关联，后者牢固地位于GW170817的3D天空图中，但其他59个候选者在GLADE v2目录或NASA / IPAC超银河数据库中没有距离信息。在59个候选者中，有58个位于Pan-STARRS1目录中扩展对象的中心，而一个候选者具有偏移量。我们介绍了候选者的位置，z波段视在幅度和时间变异性，并评估了它们位于GW170817的3D天空图中的概率。 J-GEM17btc的机率是64％，比其他59个候选物的概率高得多（9.3××10×3-3-2.1×××10×1％）。此外，其他59个候选者中的至少一个位于3D天空图内的可能性仅为3.2％。因此，我们得出的结论是，J-GEM17btc是GW170817的光学配对产品中最可能和最杰出的候选人。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号