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Fast Optical Variability of the TeV Blazar PKS 1725+123 Observed by SVOM-VT and Insights from Multiwavelength Follow-up Observations

  • Authors: Shuo-Yu Liu, Yu-Wei Yu, Ji-Shun Lian, Xin-Ke Hu, Alexis Coleiro, Zhu-Heng Yao, Li-Ping Xin, Jing Wang, Hua-Li Li, Zi-Qi Wang, Jin Zhang, Floriane Cangemi, Bertrand Cordier, Antoine Foisseau, Olivier Godet, Andrea Goldwurm, Diego Götz, Sébastien Guillot, Xu-Hui Han, Ning Jiang, Cyril Lachaud, Sébastien Le Stum, En-Wei Liang, Pierre Maggi, Yu-Lei Qiu, Jérôme Rodriguez, Lian Tao, Jian-Yan Wei, Chao Wu, Liang Zhang, Shuang-Nan Zhang, Shi-Jie Zheng

Shuo-Yu Liu et al 2026 The Astrophysical Journal Letters 1005 .

  • Provider: AAS Journals

Caption: Figure 5.

Spectra observed by Fermi-LAT for PKS 1725+123, including the 17 yr integrated spectrum (black symbols) and the three time-resolved spectra in the following time intervals: 2025 August 16–18 (magenta symbols), August 19–21 (blue symbols), and August 22–24 (green symbols). The corresponding colored solid lines represent the fitting results. If TS < 4, an upper limit (denoted by inverted triangles) is given for that energy bin. The sensitivity curves of the MAGIC telescopes (orange dashed line; 50 hr) and H.E.S.S. (purple dashed line; 50 hr) are also given in the figure.

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