Spectral and timing evolution of MAXI J1631–479 during the 2018–19 outburst with <i>NICER</i>

Rout, Sandeep K.; Méndez, Mariano; Belloni, T.; Vadawale, S.

doi:10.1093/mnras/stab1341

Cited by 9 publications

(16 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the intermediate states (HIMS and SIMS), the rms spectra are generally characterised with two slopes along with the peak appearing at certain energy band (Gierliński & Zdziarski 2005). The observed rms spectra (in present work) are similar to that generally observed in the intermediate state (Gierliński & Zdziarski 2005;Shaposhnikov et al 2010;Rout et al 2021).…”

Section: Spectral State Transitionsupporting

confidence: 85%

AstroSat observation of X-ray dips and state transition in the black hole candidate MAXI J1803–298

Jana

Naik

Jaisawal

et al. 2022

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We present the results obtained from broadband X-ray timing and spectral analysis of black hole candidate MAXI J1803–298 using an AstroSat observation on May 11–12, 2021. Four periodic absorption dips with a periodicity of 7.02 ± 0.18 hours are detected in the light curve. AstroSat observe the source when it was undergoing a transition from hard-intermediate state to soft-intermediate state. Our timing analysis reveals the presence of a sharp type-C quasi periodic oscillation (QPO) in the power density spectra (PDS) with an evolving QPO frequency ranging from 5.31 ± 0.02 Hz to 7.61 ± 0.09 Hz. We investigate the energy dependence of the QPO and do not find this feature in the PDS above 30 keV. The combined 0.7–80 keV SXT and LAXPC spectra are fitted with a model consisting of thermal multi-colour blackbody emission and Comptonized emission components. We perform time-resolved spectroscopy by extracting spectra during the dip and non-dip phases of the observation. A neutral absorber is detected during the dip and non-dip phases though a signature of an ionized absorber is also present in the dip phases. The spectral and temporal parameters are found to evolve during our observation. We estimate the mass function of the system as f(M) = 2.1–7.2 M⊙ and the mass of the black hole candidate in the range of MBH ∼ 3.5–12.5 M⊙.

show abstract

Section: Spectral State Transitionsupporting

confidence: 85%

AstroSat observation of X-ray dips and state transition in the black hole candidate MAXI J1803–298

Jana

Naik

Jaisawal

et al. 2022

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

show abstract

“…NICER started monitoring this source on MJD 58498 (obsID 1200500101) when it was already in the soft state, and caught a transition back to the HIMS on MJD 58506 (obsID 1200500110; Van den Eijnden et al 2019). The source stayed in the HIMS until MJD 58545 (obsID 2200500102), after which NICER had a visibility gap and the source was already back to the soft state when the monitoring resumed on MJD 58560 (obsID 2200500108; Rout et al 2021). As no NICER data is available in the hard state, all the good groups we find are in the HIMS, and the results for one representative group is shown in Figure A5.…”

Section: A3 Maxi J1535-571mentioning

confidence: 99%

The NICER “Reverberation Machine”: A Systematic Study of Time Lags in Black Hole X-Ray Binaries

Wang

Kara

Lucchini

et al. 2022

ApJ

View full text Add to dashboard Cite

We perform the first systematic search of all NICER archival observations of black hole (and candidate) low-mass X-ray binaries for signatures of reverberation. Reverberation lags result from the light travel time difference between the direct coronal emission and the reflected disk component, and therefore their properties are a useful probe of the disk-corona geometry. We detect new signatures of reverberation lags in eight sources, increasing the total sample from three to 11, and study the evolution of reverberation lag properties as the sources evolve in outbursts. We find that in all of the nine sources with more than one reverberation lag detection, the reverberation lags become longer and dominate at lower Fourier frequencies during the hard-to-soft state transition. This result shows that the evolution in reverberation lags is a global property of the state transitions of black hole low-mass X-ray binaries, which is valuable in constraining models of such state transitions. The reverberation lag evolution suggests that the corona is the base of a jet that vertically expands and/or gets ejected during state transition. We also discover that in the hard state, the reverberation lags get shorter, just as the quasiperiodic oscillations (QPOs) move to higher frequencies, but then in the state transition, while the QPOs continue to higher frequencies, the lags get longer. We discuss the implications of the coronal geometry and physical models of QPOs in light of this new finding.

show abstract

“…NICER started monitoring this source on MJD 58498 (obsID 1200500101) when it was already in the soft state, and caught a transition back to the HIMS on MJD 58506 (obsID 1200500110;van den Eijnden et al 2019). The source stayed in the HIMS until MJD 58545 (obsID 2200500102), after which NICER had a visibility gap and the source was already back to the soft state when the monitoring resumed on MJD 58560 (obsID 2200500108; Rout et al 2021). As no NICER data is available in the hard state, all the good groups we find are in the HIMS, and the results for one representative group is shown in Fig.…”

Section: A3 Maxi J1535-571mentioning

confidence: 87%

The NICER "Reverberation Machine": A Systematic Study of Time Lags in Black Hole X-Ray Binaries

Wang,

Kara,

Lucchini

et al. 2022

Preprint

View full text Add to dashboard Cite

We perform the first systematic search of all NICER archival observations of black hole (and candidate) low-mass X-ray binaries for signatures of reverberation. Reverberation lags result from the light travel time difference between the direct coronal emission and the reflected disk component, and therefore their properties are a useful probe of the disk-corona geometry. We detect new signatures of reverberation lags in 8 sources, increasing the total sample from 3 to 11, and study the evolution of reverberation lag properties as the sources evolve in outbursts. We find that in all of the 9 sources with more than 1 reverberation lag detection, the reverberation lags become longer and dominate at lower Fourier frequencies during the hard-to-soft state transition. This result shows that the evolution in reverberation lags is a global property of the state transitions of black hole low-mass X-ray binaries, which is valuable in constraining models of such state transitions. The reverberation lag evolution suggests that the corona is the base of a jet which vertically expands and/or gets ejected during state transition. We also discover that in the hard state, the reverberation lags get shorter, just as the QPOs move to higher frequencies, but then in the state transition, while the QPOs continue to higher frequencies, the lags get longer. We discuss implications for the coronal geometry and physical models of QPOs in light of this new finding.

show abstract

Spectral and timing evolution of MAXI J1631–479 during the 2018–19 outburst with NICER

Cited by 9 publications

References 49 publications

AstroSat observation of X-ray dips and state transition in the black hole candidate MAXI J1803–298

AstroSat observation of X-ray dips and state transition in the black hole candidate MAXI J1803–298

The NICER “Reverberation Machine”: A Systematic Study of Time Lags in Black Hole X-Ray Binaries

The NICER "Reverberation Machine": A Systematic Study of Time Lags in Black Hole X-Ray Binaries

Contact Info

Product

Resources

About