Speaker
Description
Recently, (Type-I) X-ray bursts have been observed in a neutron star SRGA J144459.2-604207 by various X-ray satellites, firstly INTEGRAL and NinjaSat (Atel: 16485, 16495). To summarize their observations shortly, in the early phase, they show very regular behavior, i.e., Clocked bursters, but in the latter phase, they become irregular. From such a Clocked burster with various properties, we can probe the nature of low-mass X-ray binaries through the comparison of theoretical X-ray burst models. In this work, we report the modeling SRGA J144459.2-604207 for multi-X-ray observations, focusing on the composition of accreted matter. We will also mention the relation between persistent flux and recurrence time observed by the NinjaSat and its implication to neutron-star mass.
