Zhou, Hao https://orcid.org/0000-0003-2915-7434
Ren, Jia https://orcid.org/0000-0002-9037-8642
Wang, Chen-Wei https://orcid.org/0009-0008-8053-2985
Liu, Xing https://orcid.org/0000-0002-4072-6899
Liu, Bin-Yang https://orcid.org/0000-0002-0561-7937
Levan, Andrew J. https://orcid.org/0000-0001-7821-9369
Rastinejad, Jillian C. https://orcid.org/0000-0002-9267-6213
Geng, Jin-Jun https://orcid.org/0000-0001-9648-7295
Wang, Hao https://orcid.org/0000-0002-0556-1857
Blanchard, Peter K. https://orcid.org/0000-0003-0526-2248
Fong, Wen-fai https://orcid.org/0000-0002-7374-935X
Gompertz, Benjamin P. https://orcid.org/0000-0002-5826-0548
Malesani, Daniele B. https://orcid.org/0000-0002-7517-326X
Kilpatrick, Charles D. https://orcid.org/0000-0002-5740-7747
Lamb, Gavin P. https://orcid.org/0000-0001-5169-4143
Metzger, Brian D. https://orcid.org/0000-0002-4670-7509
Nicholl, Matt https://orcid.org/0000-0002-2555-3192
Tanvir, Nial R. https://orcid.org/0000-0003-3274-6336
Wang, Yun https://orcid.org/0000-0002-8385-7848
Rong, Yu https://orcid.org/0000-0002-2204-6558
Liang, Run-Duo https://orcid.org/0000-0001-6223-840X
Ling, Zhi-Xing https://orcid.org/0009-0008-7068-0693
Xu, Dong https://orcid.org/0000-0003-3257-9435
Jin, Zhi-Ping https://orcid.org/0000-0003-4977-9724
Wei, Da-Ming https://orcid.org/0000-0002-9758-5476
Funding for this research was provided by:
MOST ∣ National Key Research and Development Program of China (2023YFA1608100)
MOST ∣ National Key Research and Development Program of China (2024YFA1611704)
MOST ∣ National Natural Science Foundation of China (12225305)
MOST ∣ National Natural Science Foundation of China (12321003)
MOST ∣ National Natural Science Foundation of China (12473049)
中国博士后科学基金 ∣ National Postdoctoral Program for Innovative Talents (BX20250159)
中国博士后科学基金 ∣ National Postdoctoral Program for Innovative Talents (BX20250160)
Article Title: EP241217a: A Likely Type II GRB with an Achromatic Bump at z = 4.59
Journal Title: The Astrophysical Journal
Article Type: paper
Copyright Information: © 2026. The Author(s). Published by the American Astronomical Society.
Publication dates
Date Received: 2025-07-08
Date Accepted: 2025-12-07
Online publication date: 2026-02-09