2023/09/21 by Manoj Ghising, Ghising, Manoj, Ruchi Tamang +7
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Pulsars and Gravitational Waves Research
paper · pdf · doi:10.48550/arxiv.2309.11823
openalex publication_date 2023/09/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, we report the results of the detailed temporal and spectral studies of the BeXRB J21347+4737 based on the data from the NuSTAR and SWIFT/XRT in a wide energy range of 0.5-50 keV. Coherent pulsation with a period of 322.738 ± 0.018 s was found in the light curve, implying, the source pulsation has spun down by 0.341 s yr-1 when compared with the coherent pulsation estimated from XMM Newton more than 7 years ago. The pulse profile of the source demonstrates energy dependence and has evolved with time. The pulse fraction of the source observed by NuSTAR initially decreases with energy upto ∼15 keV, followed by a non-monotonic increasing trend above 15 keV. The source spectrum can be well approximated by an absorbed power-law model with modification by an exponential cutoff at high energies. The absorbed flux of the source is 4×10-11 erg cm-2 s-1 and its corresponding luminosity is 3.5×1035 erg s-1. The study of pulse-phase resolved spectroscopy shows a strong variation of spectral parameters on the phase. No additional emission or absorption features in the form of Fe line or Cyclotron lines were observed both in the phase-averaged and phase-resolved spectra of IGR J21347+4737.