Spectral and Timing properties of the recently discovered Be/X-ray pulsar eRASSUJ 052914.9-662446

TL;DR

This paper presents the first detailed spectral and timing analysis of the newly discovered Be/X-ray pulsar eRASSU J052914.9-662446, revealing its pulsation period, energy-dependent pulse profiles, and spectral characteristics using NuSTAR and Swift data.

Contribution

It provides the first comprehensive timing and spectral properties of the pulsar, including pulse period, profile shape, and spectral modeling, based on 2020 observations.

Findings

Detected a 1411.5 s pulsation period.

Pulse profile is single-peaked and energy-dependent.

Spectral fit with power-law plus high-energy cutoff.

Abstract

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$\pm$0.5 s was detected from the source. The pulse profile was found to resemble a simple single peaked feature which 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 are 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 cutoff of $\sim$ 5.7 keV. The NuSTAR luminosity in the 0.5-79 keV energy range was $\sim$ 7.9x10 35 erg/s. The spectral flux in 3-79 keV shows modulation with the pulse phase.