| Name: | Khushi Jirawala |
| Affiliation: | CHRIST(Deemed to be University) |
| Conference ID : | ASI2024_790 |
| Title : | NuSTAR view of XTE J1701−462: Constraining the physical parameters |
| Authors : | Neal Titus Thomas, Khushi Jirawala, S. B. Gudennavar and Bubbly S. G.
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| Authors Affiliation: | Neal Titus Thomas, Khushi Jirawala, S. B. Gudennavar and Bubbly S. G. (Department of Physics and Electronics, CHRIST University, Bangalore-560029 ) |
| Mode of Presentation: | Poster |
| Abstract Category : | High Energy Phenomena, Fundamental Physics and Astronomy |
| Abstract : | XTE J1701−462 is a transient neutron star low mass X-ray binary (NS-LMXB) that was discovered in 2006 during an outburst. It is a peculiar source that has exhibited characteristics of all sub-classes of NS-LMXBs and may be the missing link that could explain the difference between them. Given its transient nature, the source has been studied mostly using data from its 2006 outburst. Moreover, these studies have been limited by the spectral and temporal capabilities of erstwhile observatories. In 2022, XTE J1701−462 underwent its second known outburst, providing an opportunity to study its properties with current X-ray observatories. The source was observed by FPMA/B detectors on-board the Nuclear Spectroscopic Telescope Array (NuSTAR). We present spectral analysis in the 3.0 - 30.0 keV range on data from two NuSTAR observations carried out during the initial phase of the outburst. The source traced out characteristic patterns of the banana branch and the vertex of the horizontal and the normal branch in its hardness intensity diagram. Spectral modeling revealed the presence of a relativistically broadened Fe X-ray emission complex. The 3.0 - 30.0 keV spectra was modelled with a model combination consisting of an absorbed (tbabs) multi-temperature black body (diskbb) component along with a reflection component (relxillNS) and yielded a source inclination between 25−33° and an inner disc radius of ~ 17.4 km. Furthermore, assuming the case of magnetic truncation of accretion disc, the upper limits for the magnetic dipole moment and the field strength at the poles of the neutron star in the system were found to be 5.78×1026 G cm3 and 8.23×108 G, respectively, with kA (a coefficient that depends on the conversion from spherical to disc accretion) assumed to be unity. These results will be presented in the conference.
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