Yin, Yi-Han Iris https://orcid.org/0000-0002-5596-5059
Fang, Yuan https://orcid.org/0009-0006-1010-1325
Zhang, Bin-Bin https://orcid.org/0000-0003-4111-5958
Deng, Chen https://orcid.org/0000-0002-2191-7286
Yang, Jun https://orcid.org/0000-0002-5485-5042
Chen, Run-Chao https://orcid.org/0009-0009-2083-1999
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Cheng, Yehao https://orcid.org/0000-0001-8278-2955
Xu, Dong
Wang, Xiaofeng https://orcid.org/0000-0002-7334-2357
Shen, Rongfeng https://orcid.org/0000-0001-5012-2362
Li, Rui-Zhi https://orcid.org/0000-0002-4205-0933
Mao, Jirong https://orcid.org/0000-0002-7077-7195
Li, Wen-Xiong https://orcid.org/0000-0002-0096-3523
Castro-Tirado, Alberto Javier https://orcid.org/0000-0003-2999-3563
Lei, Weihua
Fu, Shao-Yu https://orcid.org/0009-0002-7730-3985
Yang, Yuan-Pei https://orcid.org/0000-0001-6374-8313
Jiang, Shuai-Qing https://orcid.org/0009-0001-8155-7905
An, Jie
Chen, Chun https://orcid.org/0009-0004-4767-3146
Dong, Zhong-Nan https://orcid.org/0009-0003-5592-3734
Du, Guowang https://orcid.org/0000-0002-8109-7152
Esamdin, Ali https://orcid.org/0000-0003-1845-4900
Fan, Zhou
Feng, Haicheng https://orcid.org/0000-0002-1530-2680
Feng, Lu
Fernández-García, Emilio
Gao, Xing
Gritsevich, Maria https://orcid.org/0000-0003-4268-6277
Guo, Wei-Jian https://orcid.org/0000-0001-9457-0589
Hu, Jingwei https://orcid.org/0000-0002-0779-1947
Hu, You-Dong https://orcid.org/0000-0002-7400-4608
Hua, Yanlong https://orcid.org/0009-0000-2190-6600
Iskandar, Abdusamatjan https://orcid.org/0009-0003-9229-9942
Jin, Junjie https://orcid.org/0000-0002-8402-3722
Li, Niu https://orcid.org/0000-0002-0656-075X
Li, Xia https://orcid.org/0000-0001-6820-1683
Li, Ziwei https://orcid.org/0000-0001-7140-1950
Lin, Jia-Qi https://orcid.org/0000-0002-3134-9526
Liu, Dezi https://orcid.org/0000-0002-0409-5719
Liu, Jinzhong https://orcid.org/0000-0002-7420-6744
Liu, Qichun https://orcid.org/0009-0007-3491-7086
Liu, Xiaowei https://orcid.org/0000-0003-1295-2909
Liu, Xing
Malesani, Daniele B. https://orcid.org/0000-0002-7517-326X
Pérez-García, Ignacio
Sun, Hui https://orcid.org/0000-0002-9615-1481
Wu, Xue-Feng https://orcid.org/0000-0002-6299-1263
Xiao, Yun-Ao https://orcid.org/0009-0004-2243-8289
Xiong, Ding-Rong https://orcid.org/0000-0002-6809-9575
Yan, Shengyu https://orcid.org/0009-0004-4256-1209
Zhang, Beibei https://orcid.org/0009-0002-3014-0277
Zhang, Jinghua https://orcid.org/0000-0002-2510-6931
Zhu, Haichang
Zhu, Zipei https://orcid.org/0000-0002-9022-1928
Zou, Hu
Yuan, Weimin
Zhang, Bing https://orcid.org/0000-0002-9725-2524
Article Title: Spectral Hardening Reveals Afterglow Emergence in Long-duration Fast X-Ray Transients: A Case Study of GRB 250404A/EP250404a
Journal Title: The Astrophysical Journal Letters
Article Type: paper
Copyright Information: © 2025. The Author(s). Published by the American Astronomical Society.
Publication dates
Date Received: 2025-05-30
Date Accepted: 2025-07-27
Online publication date: 2025-08-14