# Is Superorbital Modulation in SMC X-1 Caused by Absorption in a Warped Precessing Accretion Disk?

@article{Pradhan2020IsSM,
title={Is Superorbital Modulation in SMC X-1 Caused by Absorption in a Warped Precessing Accretion Disk?},
author={Pragati Pradhan and Chandreyee Maitra and Biswajit Paul},
journal={arXiv: High Energy Astrophysical Phenomena},
year={2020}
}
• Published 1 April 2020
• Physics
• arXiv: High Energy Astrophysical Phenomena
We present a broadband spectral-timing analysis of SMC X-1 at different intensity states of its super-orbital variation using 10 Suzaku and 6 NuSTAR observations. The spectrum in all the states can be described by an absorbed powerlaw with a high energy cutoff and a black-body component along with an iron emission line. Compared to other supergiant HMXBs, the Fe K$\alpha$ line equivalent width is low in SMC X-1 - from less than 10 eV in high state to up to $\sim$ 270 eV in the low states. The…
1 Citations

## Figures and Tables from this paper

Comprehensive broad-band study of accreting neutron stars with Suzaku: Is there a bi-modality in the X-ray spectrum?
• Physics
• 2021
We present a broadband spectral analysis of accreting neutron stars using data from XIS and PIN onboard Suzaku. From spectral fits of these sources with a single continuum model including a powerlaw

## References

SHOWING 1-10 OF 45 REFERENCES
BeppoSAX observations of the accretion-powered X-ray pulsar SMC X-1
We present here results obtained from three BeppoSAX observations of the accretion-powered X-ray pulsar SMC X-1 carried out during the declining phases of its 40-60 days long super-orbital period.
Phase variation in the pulse profile of SMC x-1
• Physics
• 2004
We present the results of the timing and spectral analysis of X-ray high-state observations of the high-mass X-ray pulsar SMC X-1 with Chandra, XMM-Newton, and ROSAT, taken between 1991 and 2001. The
Modeling the Precession of the Warped Inner Accretion Disk in the Pulsars LMC X-4 and SMC X-1 with NuSTAR and XMM-Newton
• Physics
• 2019
We present a broad-band X-ray study of the effect of superorbital periods on X-ray spectra and pulse profiles in the neutron star X-ray binaries LMC X-4 and SMC X-1. These two sources display
Quasi-periodic Occultation by a Precessing Accretion Disk and Other Variabilities of SMC X-1
We have investigated the variability of the binary X-ray pulsar SMC X-1 in data from several X-ray observatories. We confirm the ~60 day cyclic variation of the X-ray flux in the long-term monitoring
Spectroscopic signatures of the superorbital period in the neutron star binary LMC X-4
We present the first high-resolution X-ray study of emission line variability with superorbital phase in the neutron star binary LMC X-4. Our analysis provides new evidence from X-ray spectroscopy
Observing the Transient Pulsations of SMC X-1 with NuSTAR
We report on NuSTAR observations of transient pulsations in the neutron star X-ray binary SMC X-1. The transition from non-pulsing to pulsing states was not accompanied by a large change in flux.
Nature of the Soft Spectral Component in the X-ray Pulsars SMC X-1 and LMC X-4
• Physics
• 2002
We present here the results of an investigation of the pulse averaged and pulse phase resolved energy spectra of two high luminosity accretion powered X-ray pulsars SMC X-1 and LMC X-4 made with
A detailed study of 2S 0114+650 with the Rossi X-ray Timing Explorer
• Physics
• 2008
We present the results of a detailed study of the high-mass X-ray binary 2S 0114+650 made with the pointed instruments onboard the Rossi X-ray Timing Explorer. The spectral and temporal behaviour of
A Detailed Study of 2S 0114+650 with the RXTE
• Physics
• 2007
We present the results of a detailed study of the high mass X-ray binary 2S 0114+650 made with the pointed instruments onboard the Rossi X-ray Timing Explorer. The spectral and temporal behaviour of
The super-orbital modulation of supergiant high-mass X-ray binaries
• Physics
• 2017
The long-term X-ray light curves of classical supergiant X-ray binaries and supergiant fast X-ray transients show relatively similar super-orbital modulations, which are still lacking a sound