Long term variability of Swift J1753.5-0127]{Long term variability of Swift J1753.5-0127: X-ray spectral-temporal correlations during state transitions. (arXiv:1905.08072v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Bu_Q/0/1/0/all/0/1">Qingcui Bu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tao_L/0/1/0/all/0/1">Lian Tao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lu_Y/0/1/0/all/0/1">Yu Lu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_S/0/1/0/all/0/1">Shuangnan Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_L/0/1/0/all/0/1">Liang Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Huang_Y/0/1/0/all/0/1">Yue Huang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chen_L/0/1/0/all/0/1">Li Chen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Qu_J/0/1/0/all/0/1">Jinlu Qu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ma_X/0/1/0/all/0/1">Xiang Ma</a>
We studied the long-term evolution of the spectral-temporal correlated
properties of the black hole candidate Swift J1753.5-0127 from the onset of its
outburst until 2011 with the Rossi X-ray Timing Explorer (RXTE). The source
stayed most of its lifetime during hard state, with occasionally transitioned
to the hard intermediate state. Similar to typical black hole transients, Swift
J1753.5-0127 traces a clear hard line in absolute rms – intensity diagram
during the low hard state, with expected highest absolute rms, while shows a
clear turn during the hard intermediate state, accompanied by lower absolute
rms. Different from Cyg X-1, we found that frequency-dependent time lag
increased significantly in the 0.02 — 3.2 Hz band during state transition in
this source. The X-ray time lags in 0.02 — 3.2 Hz can therefore be used as
indicators of state transition in this source. Type-C QPO frequency is
positively related with its fractional rms and X-ray photon index, suggesting a
moving inwards disk/corona scenario. We discussed the physical interpretation
of our results in our paper.
We studied the long-term evolution of the spectral-temporal correlated
properties of the black hole candidate Swift J1753.5-0127 from the onset of its
outburst until 2011 with the Rossi X-ray Timing Explorer (RXTE). The source
stayed most of its lifetime during hard state, with occasionally transitioned
to the hard intermediate state. Similar to typical black hole transients, Swift
J1753.5-0127 traces a clear hard line in absolute rms – intensity diagram
during the low hard state, with expected highest absolute rms, while shows a
clear turn during the hard intermediate state, accompanied by lower absolute
rms. Different from Cyg X-1, we found that frequency-dependent time lag
increased significantly in the 0.02 — 3.2 Hz band during state transition in
this source. The X-ray time lags in 0.02 — 3.2 Hz can therefore be used as
indicators of state transition in this source. Type-C QPO frequency is
positively related with its fractional rms and X-ray photon index, suggesting a
moving inwards disk/corona scenario. We discussed the physical interpretation
of our results in our paper.
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