Speaker
Description
XRISM/Xtend has a large Field of View (FOV; 38′×38′) and can detect serendipitous transient X-ray phenomena in the FOV. XRISM/Xtend detected a supergiant fast X-ray transient from AX J1910.7+0917 during observation of PV target W49B. The AX J1910.7+0917 is the slowest X-ray pulsar with a rotation period of ~ 10 hours. In the spectral analysis, the time average spectrum is reproduced with an absorbed power-law model resulting in luminosity of 〖1.8〗_(−0.1)^(+0.1) × 10^35 erg s^(−1) (1−10 keV). We divided the light curves into 5 phases to investigate time variability. The Fe emission line(s) is(/are) detected in bright phase. Assuming the line width as Doppler broadening, the Keplerian radius is consistent with Alfvén radius with magnetic field of 1012 G. We detected pulsation period of 3.6−3.9×104 s. Possibly, there is a positive correlation between flux and rotation period. The AX J1910.7+0917 may be a key object to investigate the SFXT and related accretion phenomena.
