Abstract
We present the results of the broadband timing and spectral analysis of the poorly understood SMC pulsar RX J0032.9-7348 (=SXP 7.02) using NuSTAR and NICER observations during its X-ray brightening in 2024. Our timing analysis revealed a pulsation period of approximately 7.02 s in the X-ray light curve. The pulse profile obtained in the broad energy range is double-peaked and asymmetric in nature and shows moderate variation with the energy. An absorbed power-law model describes the 0.5-8 keV NICER spectra well. The 3-50 keV NuSTAR spectrum is best described with an absorbed power-law modified with a high-energy cutoff model. We find no evidence of iron or cyclotron line features in the energy spectrum. During our observation period, the 0.5-50 keV luminosity varies in the range of erg s. We also discuss the dependence of spectral parameters on the rotational phase of the pulsar through phase-resolved spectroscopy.
| Original language | English |
|---|---|
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 539 |
| Issue number | 4 |
| Pages (from-to) | 3437-3444 |
| ISSN | 0035-8711 |
| DOIs | |
| Publication status | Published - 2025 |
Keywords
- Pulsars: individual: RX J0032.9-7348
- X-rays: binaries