2022MNRAS.517.4092R

We have presented NuSTAR and Swift observations of the newly discovered Be/X-ray pulsar eRASSU J052914.9-662446. This is the first detailed study of the temporal and spectral properties of the pulsar using 2020 observations. A coherent pulsation of 1411.5 ± 0.5 s was detected from the source. The pulse profile was found to resemble a simple single-peaked feature that may be due to emission from the surface of the neutron star only. Pulse profiles are highly energy dependent. The variation of the pulse fraction of the pulse profiles is found to be non-monotonic with energy. The 0.5-20 keV Swift and NuSTAR simultaneous can be fitted well with power law modified by high-energy cut-off of ∼5.7 keV. The NuSTAR luminosity in the 0.5-79 keV energy range was ∼7.9 × 10³⁵$\text{erg}\,\text{s}^{ -1}\,$. The spectral flux in 3-79 keV shows modulation with the pulse phase.