Abstract
Abstract During a routine calibration observation of 1E 0102.2$-$ 7219 in the Small Magellanic Cloud (SMC), carried out in 2012 October for the Suzaku satellite, we detected a transient X-ray source at (RA, Dec) $ =$ (01$ ^{\rm h}$ 02$ ^{\rm m}$ 47$ ^{\rm s}$ , $-$ 72$ ^\circ$ 04$ ^{\rm m}$ 54$ ^{\rm s}$ ) in the equinox J2000.0 with a positional uncertainty of $ \sim$ 14. We conducted a temporal and spectral analysis of the source and found a coherent pulse signal with a period of 522.3 $ \pm$ 0.1 s. We also found a featureless spectrum described by a single power-law model with a photon index of 1.0$ ^{+0.1}_{-0.1}$ and a 0.5–10 keV luminosity of $ \sim$ 8.8 $ \times$ 10$ ^{35}$ erg s$ ^{-1}$ at an assumed distance of 60 kpc. The Suzaku source is likely to be the counterpart of 2XMM J010247.4$-$ 720449, which has been observed several times, including outburst detected by Swift. Based on the X-ray characteristics from our data, as well as the transient record and optical and near-infrared features described in the literature, we conclude that this source is a high-mass X-ray binary pulsar with a Be star companion in the SMC, which is known to harbor an exceptionally large ($ \sim$ 80) number of such sources compared to that in our Galaxy.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
