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An Extremely Bright Slow-rising Afterglow from an Off-axis Jet in GRB 260310A

  • Authors: Yu-Han Yang, Roberto Ricci, Eleonora Troja, Muskan Yadav, Yi-Han Iris Yin, Rubén Sánchez-Ramírez, Brendan O'Connor, Niccolò Passaleva, Alberto J. Castro-Tirado, Hendrik van Eerten, Simone Dichiara, Vincenzo Galluzzi, Narjes Shahamat Dehsorkh, Iván Agudo, Jesús Aceituno, Malte Busmann, Maria D. Caballero-García, Emilio Fernández-García, Daniel Gruen, Maria Gritsevich, Sergiy Guziy, David Hiriart, You-Dong Hu, Martin Jelínek, Alexander Kutyrev, Alzbeta Malenakova, Filip Novotny, Ignacio Pérez-García, Shashi B. Pandey, Jorma Ryske, Alfredo Sota, Jan Strobl, Hira Waseem, Siyu Wu

Yu-Han Yang et al 2026 The Astrophysical Journal Letters 1011 .

  • Provider: AAS Journals

Caption: Figure 10.

The rebrightening of GRB 260310A (black squares), scaled from X-rays to optical assuming νc ≈  0.1 keV and a power-law index of β ∼ 0.6. A sample of late-time afterglow rebrightenings, including AT2019pim (D. A. Perley et al. 2025), GRB 970508 (T. J. Galama et al. 1998b), GRB 210704A (assuming z ≈ 2.3; R. L. Becerra et al. 2023), EP241021a (M. Busmann et al. 2025), and EP240414a (H. Sun et al. 2025), is shown for comparison.

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