Speaker
Tomoshi Takeda
(RIKEN/Tokyo university of Science)
Description
NinjaSat is the RIKEN's 6U-size X-ray CubeSat launched on 2023 November 11. The main instrument is Xe-based proportional counter covering the energy range of 2--50~keV. Just after we finished the satellite commissioning in 2024 February, the new X-ray transient SRGA J144459.2-604207 appeared. NinjaSat observed SRGA J1444 from 2024 from February 21 to March 18. Meanwhile, NinjaSat detected 12 Type-I X-ray bursts. The recurrence time of X-ray bursts became longer from 2 hour to 8 hour as the source flux decreased. The recurrent time was found to be almost inversely proportional to the accumulated flux.
Primary author
Tomoshi Takeda
(RIKEN/Tokyo university of Science)
