Broadband X-Ray Spectral and Timing Analyses of the Black Hole Binary Candidate Swift J1658.2?4242: Rapid Flux Variation and the Turn-on of a Transient QPO

@inproceedings{Xu2019BroadbandXS,
  title={Broadband X-Ray Spectral and Timing Analyses of the Black Hole Binary Candidate Swift J1658.2?4242: Rapid Flux Variation and the Turn-on of a Transient QPO},
  author={Yanjun Xu and Fiona Anne Harrison and John A. Tomsick and Didier Barret and Poshak Gandhi and Javier A. Garcia and J. Mitchell Miller and Philip Uttley and D. J. Walton},
  year={2019}
}
We report results from joint NuSTAR, Swift and XMM-Newton observations of the newly discovered black hole X-ray binary candidate Swift J1658.2–4242 in the intermediate state. We observe a peculiar event in this source, with its X-ray flux rapidly decreasing by ∼45% in ∼40 s, accompanied by only subtle changes in the shape of the broadband X-ray spectrum. In addition, we find a sudden turn-on of a transient QPO with a frequency of 6 − 7 Hz around the time of the flux change, and the total… CONTINUE READING

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