Miniature satellite NinjaSat discovers an unusually short X-ray burst cycle

2025-11-06 Hot Topic
Photo of Akira Dohi Akira Dohi

An international collaborative research group including Akira Dohi, Special Postdoctoral Researcher, has observed an X-ray binary system known as a “clock burster,” which produces X-ray bursts at regular intervals, using NinjaSat, the CubeSat X-ray satellite led by RIKEN. The team discovered that this object has the shortest burst recurrence time ever recorded, 1.6 hours.

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Reference

  1. Tomoshi Takeda, Toru Tamagawa, Teruaki Enoto, Wataru Iwakiri, Akira Dohi, Tatehiro Mihara, Hiromitsu Takahashi, Chin-Ping Hu, Amira Aoyama, Naoyuki Ota, Satoko Iwata, Takuya Takahashi, Kaede Yamasaki, Takayuki Kita, Soma Tsuchiya, Yosuke Nakano, Mayu Ichibakase, Nobuya Nishimura, and (NinjaSat collaboration), Return of the Clocked Burster: Exceptionally Short Recurrence Time in GS 1826−238, ApJL 993 L13 (2025), doi: 10.3847/2041-8213/ae0e75

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