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ABSTRACT This paper used Nuclear Spectroscopic Telescope Array observations to examine the temporal and spectral features of the Be/X-ray binary pulsar MAXI J1409−619. The timing analysis of the light curve finds the pulsation of the source at (501. 23\, \, \, \, 0. 01) s. The pulse profile of the source in various energy bands was analysed and showed weak dependence on energy exhibiting asymmetric character and generally suggests a source accretion in the subcritical regime. The variation of pulse fraction with photon energy in general shows an increasing trend. Assuming a distance of 14. 5 kpc, we calculated the 3–30 keV source luminosity to be 6. 13\, \, \, \, 10^34\, \, erg s^-1. The long-term spin evolution of the source was carried out, where the source underwent torque reversal.
Ghimiray et al. (Wed,) studied this question.