45 citations · 139 across the 28 of their papers we have counts for
25 papers · 1 filter
Phase-resolved QPO Analysis of GX 339-4: Improved Technique and Consistent Behaviors between QPOs and Broadband Noise
Jin Qin, Hua Feng, Liang Zhang +5
The nature of low-frequency quasi-periodic oscillations (QPOs) in black hole X-ray binaries remains unclear, and their relationship with the accompanying broadband noise (BBN) is s…
Fast Optical Variability of the TeV Blazar PKS 1725+123 Observed by SVOM-VT and Insights from Multi-wavelength Follow-up Observations
Shuo-Yu Liu, Yu-Wei Yu, Ji-Shun Lian +29
PKS 1725+123 is a flat-spectrum radio quasar (FSRQ) with a redshift of . The detection of this object in the TeV band was reported by the MAGIC telescopes and H.E.S.S. in…
An Insight-HXMT View of the Evolution of the Type-C Quasiperiodic Oscillation during the Flaring State of Swift J1727.8-1613
Min Wei, Xiang Ma, Liang Zhang +16
We present a detailed analysis of the evolution of type-C quasiperiodic oscillations (QPOs) observed during the flaring state of the recently discovered black hole X-ray binary Swi…
Investigation on Quasi-periodic Oscillation Phase Lag of RE J1034+396
Wen-Zhong Li, Shu Zhang, Qing-Cang Shui +9
We conduct an in-depth study of the quasi-periodic oscillation (QPO) properties of RE J1034+396, by constructing QPO phase-folded light curves from 10 XMM-Newton observations durin…
SVOM discovery of a strong X-ray outburst of the blazar 1ES~1959+650 and multi-wavelength follow-up with the Neil Gehrels Swift observatory
A. Foisseau, A. Coleiro, S. Komossa +37
On December 6, 2024, 1ES 1959+650, one of the X-ray brightest blazars known, underwent a high-amplitude X-ray outburst detected by SVOM, the first such discovery with this mission.…
Detection of Oscillations in a Type I X-Ray Burst of 4U 0614+091 with SVOM/ECLAIRs
Sébastien Le Stum, Floriane Cangemi, Alexis Coleiro +29
On 2025 January 10, a thermonuclear (Type I) X-ray burst from the neutron star low-mass X-ray binary \textit{4U~0614+091} was detected with the ECLAIRs instrument on board the \tex…
QPOs in a highly magnetized ultra-compact X-ray binary 4U 1626-67
Zi-Yi Zhou, Long Ji, Ling-Da Kong +3
We report the detection of mHz quasi-periodic oscillations (QPOs) in four NuSTAR observations of 4U 1626-67 during its recent spin-down episode. By using a novel method based on th…
Timing and spectral studies of SRGA J144459.2604207 with NICER, Einstein Probe, IXPE, NuSTAR, Insight-HXMT and INTEGRAL during its 2024 outburst
Zhaosheng Li, Lucien Kuiper, Yuanyue Pan +13
SRGA J144459.2604207 is a newly confirmed accreting millisecond X-ray pulsar and type I X-ray burster. We present the broadband X-ray timing and spectral behaviors of SRGA J1444…
Patterns of X-ray and -ray Flares: from Blazar to Maganetar and Sun
Haiyun Zhang, Dahai Yan, Lijuan Dong +6
Using Gaussian process methods, we analyzed the light curves of three extreme solar X-ray flares observed by the RHESSI satellite. Their variability characteristics were then compa…
Spectral analysis of the X-ray flares in the 2023 outburst of the new black binary transient Swift J1727.8--1613 observed with Insight-HXMT
Jia-Ying Cao, Jin-Yuan Liao, Shuang-Nan Zhang +12
The new black hole transient Swift J1727.8--1613 exhibited a series of X-ray flares during its 2023 outburst extensively observed with Insight-HXMT. We analyze the spectra of the f…
NICER, NuSTAR and Insight-HXMT views to black hole X-ray binary SLX 1746--331
Jing-Qiang Peng, Shu Zhang, Qing-Cang Shui +13
We study the spectral and temporal properties of the black hole X-ray transient binary SLX 1746--331 during the 2023 outburst with NICER, NuSTAR, and Insight-HXMT observations. Thr…
NICER, NuSTAR and Insight-HXMT views to the newly discovered black hole X-ray binary Swift J1727.8--1613
Jing-Qiang Peng, Shu Zhang, Qing-Cang Shui +13
Swift J1727.8--1613 is a black hole X-ray binary newly discovered in 2023. We perform spectral analysis with simultaneous Insight-HXMT, NICER and NuSTAR observations when the sourc…
Insight-HXMT observations on thermonuclear X-ray bursts from 4U~1608--52 in 2022: the accretion rate dependent anisotropy of burst emission
Yu-Peng Chen, Shu Zhang, Long Ji +10
Thermonuclear X-ray bursts occur on the surface of an accreting neutron star (NS), and their characteristics and interplay with the surrounding circumstance could be a clue to unde…
PSR J1231-1411 revisited: Pulse Profile Analysis of X-ray Observation
Liqiang Qi, Shijie Zheng, Juan Zhang +14
One of the primary goals of Neutron Star Interior Composition Explorer (NICER)-like X-ray missions is to impose stringent constraints on the neutron star equation of state by preci…
Phase-resolved Spectroscopy of Low-frequency Quasi-periodic Oscillations from the Newly Discovered Black Hole X-ray Binary Swift J1727.8-1613
Qing-Cang Shui, Shu Zhang, Jiang-Qiang Peng +14
Low-frequency quasi-periodic oscillations (LFQPOs) are commonly observed in X-ray light curves of black hole X-ray binaries (BHXRBs); however, their origin remains a topic of debat…
A timing view of the additional high-energy spectral component discovered in the black hole candidate Swift J1727.8-1613
Zi-Xu Yang, Liang Zhang, Shuang-Nan Zhang +15
We present an energy-dependent analysis for the type-C quasi-periodic oscillations (QPOs) observed in the black hole X-ray binary Swift J1727.8-1613 using Insight-HXMT observations…
Polarization Perspectives on Hercules X-1: Further Constraining the Geometry
Qingchang Zhao, Hancheng Li, Lian Tao +24
We conduct a comprehensive analysis of the accreting X-ray pulsar, Hercules X-1, utilizing data from IXPE and NuSTAR. IXPE performed five observations of Her X-1, consisting of thr…
Insights from the Gaussian Processes Method for the FRB-associated X-ray Burst of SGR 1935+2154
Ruijing Tang, Dahai Yan, Haiyun Zhang +7
Gaussian processes method is employed to analyze the light curves of bursts detected by Insight-HXMT, NICER, and GECAM from SGR 1935+2154 between 2020 to 2022. It is found that a s…
Recovery of High-energy Low-frequency Quasi-periodic Oscillations from Black Hole X-ray Binary MAXI J1535-571 with a Hilbert-Huang Transform Method
Qingcang Shui, Shu Zhang, Shuangnan Zhang +15
We propose a method based on the Hilbert-Huang transform (HHT) to recover the high-energy waveform of low-frequency quasi-periodic oscillations (LFQPOs). Based on the method, we su…
Timing analysis of the newly discovered black hole candidate Swift J1727.8-1613 with Insight-HXMT
Wei Yu, Qing-Cui Bu, Shuang-Nan Zhang +9
We present the results obtained from an X-ray timing study of the new black hole candidate (BHC) Swift J1727.8-1613. The work is based on Hard X-ray Modulation Telescope (Insight-H…
Cyclotron line evolution revealed with pulse-to-pulse analysis in the 2020 outburst of 1A 0535+262
Qingcang Shui, Shu Zhang, Pengju Wang +17
We present a detailed analysis of the X-ray luminosity (Lx) dependence of the cyclotron absorption line energy (Ecyc) for the X-ray binary pulsar 1A 0535+262 during its 2020 giant…
Studies on the soft intermediate state X-ray flare of MAXI J1535-571 during its 2017 outburst
Ruican Ma, Lian Tao, Mariano Méndez +15
We analyzed an observation with the Nuclear Spectroscopic Telescope Array of the black-hole X-ray binary MAXI J1535-571 in the soft intermediate state, in which we detected a 2.5-k…
The First Polarimetric View on Quasi-Periodic Oscillations in a Black Hole X-ray Binary
Qingchang Zhao, Lian Tao, Hancheng Li +19
We present the first polarimetric analysis of Quasi-Periodic Oscillations (QPO) in a black hole binary utilizing \textit{IXPE} data. Our study focuses on Swift J1727.8--1613, which…
Correlated spectro-polarimetric study along the Z track in XTE J1701-462 puts constraints on its coronal geometry
Wei Yu, Qingcui Bu, Victor Doroshenko +13
Context. In September 2022, the transient neutron star low-mass X-ray binary XTE J1701-462 went into a new outburst. Aims. The objective of this work is to examine the evolution of…