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| 題名: | IPTF14yb: The first discovery of a gamma-ray burst afterglow independent of a high-energy trigger |
| 作者: | 浦田裕次;Cenko, S. Bradley;Urban, Alex L.;Perley, Daniel A.;Horesh, Assaf;Corsi, Alessandra;Fox, Derek B.;Cao, Yi;Kasliwal, Mansi M.;Lien, Amy;Arcavi, Iair;Bloom, Joshua S.;Butler, Nat R.;Cucchiara, Antonino;Diego, José A. de;Filippenko, Alexei V.;Gal-Yam, Avishay;Gehrels, Neil;Georgiev, Leonid;González, J. Jesús;Graham, John F.;Greiner, Jochen;Kann, D. Alexander;Klein, Christopher R.;Knust, Fabian;Kulkarni, S. R.;Kutyrev, Alexander;Laher, Russ;Lee, William H.;Nugent, Peter E.;Xavier Prochaska, J.;Ramirez-Ruiz, Enrico;Richer, Michael G.;Rubin, Adam;Urata, Yuji;Varela, Karla;Watson, Alan M.;Wozniak, Przemek R. |
| 貢獻者: | 理學院天文研究所 |
| 關鍵詞: | Afterglows;Approximation;ASTRONOMY AND ASTROPHYSICS;Astrophysics;Confidence intervals;Emission;Explosions;flare;Gamma ray bursts;gamma-ray burst;gamma-ray burst: general;Jets;Red shift;stars;stars: flare;supernovae;supernovae: general |
| 日期: | 2015-04-20 |
| 上傳時間: | 2026-04-21 14:34:42 (UTC+8) |
| 出版者: | IOP Publishing Ltd.;Goddard Space Flight Center: The American Astronomical Society |
| 摘要: | 摘要： ABSTRACT We report here the discovery by the Intermediate Palomar Transient Factory (iPTF) of iPTF14yb, a luminous ( mag), cosmological (redshift 1.9733), rapidly fading optical transient. We demonstrate, based on probabilistic arguments and a comparison with the broader population, that iPTF14yb is the optical afterglow of the long-duration gamma-ray burst GRB 140226A. This marks the first unambiguous discovery of a GRB afterglow prior to (and thus entirely independent of) an associated high-energy trigger. We estimate the rate of iPTF14yb-like sources (i.e., cosmologically distant relativistic explosions) based on iPTF observations, inferring an all-sky value of yr−1 (68% confidence interval of 110-2000 yr−1). Our derived rate is consistent (within the large uncertainty) with the all-sky rate of on-axis GRBs derived by the Swift satellite. Finally, we briefly discuss the implications of the nondetection to date of bona fide "orphan" afterglows (i.e., those lacking detectable high-energy emission) on GRB beaming and the degree of baryon loading in these relativistic jets.
其他題名： APJL
其他題名： Astrophys. J. Lett
出版者： Goddard Space Flight Center: The American Astronomical Society
出版日期： 2015-04-20
出處： Astrophysical journal. Letters, 2015-04, Vol.803 (2), p.L24-6
資源來源： NASA Technical Reports Server
版權： 2015. The American Astronomical Society. All rights reserved.
識別號： ISSN: 2041-8205
識別號： ISSN: 2041-8213
識別號： EISSN: 2041-8213
識別號： DOI: 10.1088/2041-8205/803/2/L24 |
| 顯示於類別: | [天文研究所] 期刊論文
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