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Timing analysis of Swift J1658.2-4242's outburst in 2018 with Insight-HXMT, NICER and AstroSat | | Guangcheng Xiao
; Yu Lu
; Xiang Ma
; Mingyu Ge
; Linli Yan
; Zijian Li
; Youli Tuo
; Yue Zhang
; Wei Zhang
; Hexin Liu
; Dengke Zhou
; Liang Zhang
; Qingcui Bu
; Xuelei Cao
; Weichun Jiang
; Yupeng Chen
; Shu Zhang
; Li Chen
; Jinlu Qu
; Liming Song
; Shuangnan Zhang
; | | Date: |
10 Oct 2019 | | Abstract: | We present the observational results from a detailed timing analysis of the
black hole candidate Swift J1658.2-4242 during its 2018 outburst with the
observations of Hard X-ray Modulation Telescope (Insight-HXMT), Neutron Star
Interior Composition Explorer (NICER) and AstroSat in 0.1-250keV. The evolution
of intensity, hardness and integrated fractional root mean square (rms)
observed by Insight-HXMT and NICER are presented in this paper. Type-C
quasi-periodic oscillations (QPOs) observed by NICER (0.8-3.5Hz) and
Insight-HXMT (1-1.6Hz) are also reported in this work. The features of the QPOs
are analysed with an energy range of 0.5-50keV. The relations between QPO
frequency and other characteristics such as intensity, hardness and QPO rms are
carefully studied. The timing and spectral properties indicate that Swift
J1658.2-4242 is a black hole binary system. Besides, the rms spectra of the
source calculated from the simultaneous observation of Insight-HXMT, NICER and
AstroSat support the Lense-Thirring origin of the QPOs. The relation between
QPO phase lag and the centroid frequency of Swift J1658.2-4242 reveals a near
zero constant when < 4Hz and a soft phase lag at 6.68 Hz. This independence
follows the same trend as the high inclination galactic black hole binaries
such as MAXI J1659-152. | | Source: | arXiv, 1910.4354 | | Services: | Forum | Review | PDF | Favorites | |
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