论文标题
Pan-Starrs1 Cosmos调查进行孤儿GRB余辉搜索
Orphan GRB afterglow searches with the Pan-STARRS1 COSMOS survey
论文作者
论文摘要
我们介绍了搜索pan-Starrs1（PS1）宇宙调查中的孤儿伽马射线爆发（GRB）余气的结果。有广泛的理论和观察性证据表明GRB是准直喷的。对孤儿余潮的直接观察将进一步支持该模型。最佳调查策略是通过将PS1调查与Subaru/Hyper-Suprime-CAM（HSC）调查相连的。 The PS1 COSMOS survey, one of the survey fields in the PS1 Medium Deep Survey (PS1/MDS), searches a field of 7 deg$^2$ from December 2011 to January 2014, reaching a limiting magnitude R $\sim$ 23. The dense cadence of PS1/MDS is crucial for identifying transients, and the deep magnitude reached by the HSC survey (R $\sim$ 26) is important for evaluating potential GRB hosts.采用瞬态分类方法来选择潜在的孤儿GRB余辉候选者。在对瞬态和宿主星系属性进行了彻底的分析之后，我们得出结论，该调查领域没有候选人。无效的结果意味着，对射流结构的考虑对于进一步的孤儿GRB余辉调查至关重要。
We present the result of a search for orphan Gamma-Ray Burst (GRB) afterglows in the Pan-STARRS1 (PS1) COSMOS survey. There is extensive theoretical and observational evidence suggesting that GRBs are collimated jets; the direct observation of orphan GRB afterglows would further support this model. An optimal survey strategy is designed by coupling the PS1 survey with the Subaru/Hyper-Suprime-Cam (HSC) survey. The PS1 COSMOS survey, one of the survey fields in the PS1 Medium Deep Survey (PS1/MDS), searches a field of 7 deg$^2$ from December 2011 to January 2014, reaching a limiting magnitude R $\sim$ 23. The dense cadence of PS1/MDS is crucial for identifying transients, and the deep magnitude reached by the HSC survey (R $\sim$ 26) is important for evaluating potential GRB hosts. A transient classification method is employed to select potential orphan GRB afterglow candidates. After a thorough analysis of the transient and host galaxy properties, we conclude that there are no candidates in this survey field. The null result implies that the consideration of jet structures is essential for further orphan GRB afterglow surveys.
