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As a transient X-ray binary, MAXI J1659-152 contains a black hole candidate as its compact star. MAXI J1659-152 was discovered on 2010 September 25 during its only known outburst. Previously-published studies of this outburst indicate that…

High Energy Astrophysical Phenomena · Physics 2022-03-17 Ye Feng , Xueshan Zhao , Lijun Gou , Jianfeng Wu , James F. Steiner , Yufeng Li , Zhenxuan Liao , Nan Jia , Yuan Wang

MAXI J1305-704 has been proposed as a high-inclination candidate black hole X-ray binary in view of its X-ray properties and dipping behaviour during outburst. We present photometric and spectroscopic observations of the source in…

High Energy Astrophysical Phenomena · Physics 2021-06-30 D. Mata Sánchez , A. Rau , A. Álvarez Hernández , T. F. J. van Grunsven , M. A. P. Torres , P. G. Jonker

MAXI J1820+070 is a newly-discovered black hole X-ray binary, whose dynamical parameters, namely the black hole mass, the inclination angle and the source distance, have been estimated recently. \emph{Insight}-HXMT have observed its entire…

High Energy Astrophysical Phenomena · Physics 2021-08-11 Xueshan Zhao , Lijun Gou , Yanting Dong , Youli Tuo , Zhenxuan Liao , Yufeng Li , Nan Jia , Ye Feng , James F. Steiner

The Galactic black hole candidate MAXI J0637-430 was first discovered by $\textit{MAXI/GSC}$ on 2019 November 02. We study the spectral properties of MAXI J0637-430 by using the archived $\textit{NuSTAR}$ data and $\textit{Swift}$/XRT data.…

High Energy Astrophysical Phenomena · Physics 2023-06-28 Nan Jia , Ye Feng , Yujia Song , Jun Yang , Jieun Yuh , Peijun Huang , Lijun Gou

We present the first results on the new black hole candidate, MAXI J1305-704, observed by MAXI/GSC. The new X-ray transient, named as MAXI J1305-704, was first detected by the MAXI-GSC all-sky survey on 2012 April 9 in the direction to the…

We report the results of fitting Insight-HXMT data to the black hole X-ray binary MAXI J1348-430, which was discovered on January 26th, 2019, with the Gas Slit Camera (GSC) on-board MAXI. Several observations at the beginning of the first…

High Energy Astrophysical Phenomena · Physics 2023-10-30 Yujia Song , Nan Jia , Jun Yang , Ye Feng , Lijun Gou , Tianhua Lu

MAXI J1348-630 is a low-mass X-ray black hole binary located in the Galaxy and undergone the X-ray outburst in 2019. We analyzed the observation data in very soft state during the outburst between MJD 58588 and MJD 58596 based on the…

High Energy Astrophysical Phenomena · Physics 2023-05-10 Hanji Wu , Wei Wang , Na Sai , Haifan Zhu , Jiashi Chen

We present a broadband spectral analysis of the soft-intermediate and soft states using \textit{Insight}-HXMT observations of the black hole binary MAXI J1348--630 during its outburst in 2019. We employ a combination of reflection and…

High Energy Astrophysical Phenomena · Physics 2024-10-01 J. Guan , R. C. Ma , L. Tao , A. C. Fabian , J. A. Tomsick , S. N. Zhang , L. Zhang , J. L. Qu , S. Zhang

We constrain the spin of the black hole (BH) candidate MAXI J1727-203 using Insight-HXMT data. Due to limited HXMT observations covering only part of the outburst, NICER data were used to analyze the full outburst's state transitions, we…

High Energy Astrophysical Phenomena · Physics 2025-01-28 Haifan Zhu , Wei Wang

We analyse the X-ray spectrum of the black hole X-ray binary MAXI J1820+070 using observations from XMM-Newton and NuSTAR during 'hard' states of its 2018-2019 outburst. We take a fully Bayesian approach, and this is one of the first papers…

High Energy Astrophysical Phenomena · Physics 2024-02-20 Sachin D. Dias , Simon Vaughan , Mehdy Lefkir , Graham Wynn

We report the first half-year monitoring of the new Galactic black hole candidate MAXI J1348-630, discovered on 2019 January 26 with the Gas Slit Camera (GSC) on-board MAXI. During the monitoring period, the source exhibited two outburst…

MAXI J1820+070 is a newly discovered transient black hole X-ray binary, which showed several spectral and temporal features. In this work, we analyse the broadband X-ray spectra from all three simultaneously observing X-ray instruments…

High Energy Astrophysical Phenomena · Physics 2020-09-08 Sudip Chakraborty , Nilam Navale , Ajay Ratheesh , Sudip Bhattacharyya

Insight-HXMT is the first Chinese X-ray astronomical mission. With a 1-250 keV bandpass, an energy resolution of 150 eV at 6 keV, and without being subject to pile-up distortions, it is suitable to study bright X-ray sources like Galactic…

High Energy Astrophysical Phenomena · Physics 2022-03-28 Qichun Liu , Honghui Liu , Cosimo Bambi , Long Ji

MAXI J1820+070 (ASSASN-18ey) is a Black hole X-ray binary discovered in 2018. The brightness of the source triggered multi-wavelength campaigns of this source from different observatories. We analyse the Power Density Spectra obtained from…

High Energy Astrophysical Phenomena · Physics 2021-10-13 Yash Bhargava , Tomaso Belloni , Dipankar Bhattacharya , Sara Motta , Gabriele Ponti

MAXI J1803-298, a newly-discovered Galactic transient and black hole candidate, was first detected by \emph{MAXI}/GSC on May 1st, 2021. In this paper, we present a detailed spectral analysis of MAXI J1803-298. Utilizing the X-ray reflection…

High Energy Astrophysical Phenomena · Physics 2022-08-31 Ye Feng , Xueshan Zhao , Yufeng Li , Lijun Gou , Nan Jia , Zhenxuan Liao , Yuan Wang

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-ks long flare. Our spectral fitting results suggest that MAXI…

We report the results from \textit{AstroSat} observations of the transient Galactic black hole X-ray binary MAXI J1535-571 during its hard-intermediate state of the 2017 outburst. We systematically study the individual and joint spectra…

High Energy Astrophysical Phenomena · Physics 2019-06-04 Navin Sridhar , Sudip Bhattacharyya , Sunil Chandra , H. M. Antia

We report on the Insight-HXMT observations of the new black hole X-ray binary MAXI J1820+070 during its 2018 outburst. Detailed spectral analysis via the continuum fitting method shows an evolution of the inferred spin during its high soft…

Over the past decade, observations of relativistic outflows from outbursting X-ray binaries in the Galactic field have grown significantly. In this work, we present the first detection of moving and decelerating radio-emitting outflows from…

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