On the assessment of the disk truncation and detection of type-II-like bursts from the accreting millisecond X-ray Pulsar IGR J17062-6143

@misc{mondal2026assessment,
  title = {{On the assessment of the disk truncation and detection of type-II-like bursts from the accreting millisecond X-ray Pulsar IGR J17062-6143}},
  author = {Aditya Sow Mondal and Mahasweta Bhattacharya and Swarnendu Jana and Biplab Raychaudhuri and Gulab C. Dewangan},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2606.23156},
  eprint = {2606.23156},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.23156},
  note = {CC BY-NC-ND 4.0},
}

TY  - UNPB
TI  - On the assessment of the disk truncation and detection of type-II-like bursts from the accreting millisecond X-ray Pulsar IGR J17062-6143
AU  - Aditya Sow Mondal
AU  - Mahasweta Bhattacharya
AU  - Swarnendu Jana
AU  - Biplab Raychaudhuri
AU  - Gulab C. Dewangan
PY  - 2026
DA  - 2026/10/26
PB  - arXiv
DO  - 10.48550/arxiv.2606.23156
UR  - https://arxiv.org/abs/2606.23156
AB  - We present a spectral analysis of the NuSTAR and NICER observations of the accreting millisecond X-ray pulsar IGR J17062-6143, performed in 2022. The source remained in the hard spectral state during these observations, with a luminosity of about ∼0.13-0.14 percent of the Eddington luminosity. The continuum emission of the NuSTAR spectrum is entirely dominated by a power-law component or by Comptonized emission of disc photons by a plasma with a high electron temperature (≳100 keV). The NuSTAR spectrum also reveals clear evidence of disc reflection, a broad Fe K line around 6-8 keV, and a Compton hump peaking at 20 keV, irrespective of the choice of the continuum models. Our spectral studies suggest a disk extending close to the neutron star surface (∼6-20 R_g) at low inclination angle (∼41 degrees), as revealed by the self-consistent relativistic reflection model, relxill. In addition, we detected type-II-like bursts for the first time in the NICER observation of this source. Light curve profiles of type-II-like bursts exhibit different patterns, mostly associated with the so-called mode-0 and transition from mode-0 to mode-1 type-II bursts. The energy spectra of the persistent (pre-burst) and burst emission are well described by an absorbed Comptonization component, scattering disk- and blackbody-distributed photons, respectively, by a corona with a temperature of 1-3 keV. Although the origin of the type-II-like burst is not very clear, it has been possibly linked to disk-magnetosphere interaction of the accretion flow.
ER  -