Related papers: A rapid change in X-ray variability and a jet ejec…

The Varying Kinematics of Multiple Ejecta from the Black Hole X-ray Binary MAXI J1820+070

During a 2018 outburst, the black hole X-ray binary MAXI J1820+070 was comprehensively monitored at multiple wavelengths as it underwent a hard to soft state transition. During this transition a rapid evolution in X-ray timing properties…

High Energy Astrophysical Phenomena · Physics 2021-05-25 C. M. Wood , J. C. A. Miller-Jones , J. Homan , J. S. Bright , S. E. Motta , R. P. Fender , S. Markoff , T. M. Belloni , E. G. Körding , D. Maitra , S. Migliari , D. M. Russell , T. D. Russell , C. L. Sarazin , R. Soria , A. J. Tetarenko , V. Tudose

An extremely powerful long-lived superluminal ejection from the black hole MAXI J1820+070

Black holes in binary systems execute patterns of outburst activity where two characteristic X-ray states are associated with different behaviours observed at radio wavelengths. The hard state is associated with radio emission indicative of…

High Energy Astrophysical Phenomena · Physics 2020-03-03 J. S. Bright , R. P. Fender , S. E. Motta , D. R. A. Williams , J. Moldon , R. M. Plotkin , J. C. A. Miller-Jones , I. Heywood , E. Tremou , R. Beswick , G. R. Sivakoff , S. Corbel , D. A. H. Buckley , J. Homan , E. Gallo , A. J. Tetarenko , T. D. Russell , D. A. Green , D. Titterington , P. A. Woudt , R. P. Armstrong , P. J. Groot , A. Horesh , A. J. van der Horst , E. G. Körding , V. A. McBride , A. Rowlinson , R. A. M. J. Wijers

Optical and X-ray timing analysis of the 2018-2020 outburst and rebrightening of the black-hole transient MAXI J1820+070

We report the results of a comprehensive analysis of the multiwavelength (in optical and X-rays) and multitimescale (from months to tenths of a second) variability of the 2018-2020 outburst of the black hole transient MAXI J1820+070. During…

High Energy Astrophysical Phenomena · Physics 2025-05-21 M. Fiori , L. Zampieri , A. Burtovoi , G. Naletto , P. Ochner , U. Munari , F. Manzini , A. Vagnozzi , E. A. Barsukova , M. A. Burlak , V. P. Goranski , N. P. Ikonnikova , N. A. Katysheva , E. G. Sheyanov , S. Yu. Shugarov , A. V. Zharova , A. M. Zubareva , S. E. Motta

A variable corona during the transition from type-C to type-B quasi-periodic oscillations in the black hole X-ray binary MAXI J1820+070

We analyze a Neutron Star Interior Composition Explorer (NICER) observation of the black hole X-ray binary MAXI J1820+070 during a transition from type-C to type-B quasi-periodic oscillations (QPOs). We find that below ~2 keV, for the…

High Energy Astrophysical Phenomena · Physics 2023-08-09 Ruican Ma , Mariano Mendez , Federico Garcia , Na Sai , Liang Zhang , Yuexin Zhang

The Accretion-Ejection Connection in the Black Hole X-ray Binary MAXI J1820$+$070

The black hole X-ray binary MAXI J1820$+$070 began its first recorded outburst in March 2018, and remained an active radio, X-ray, and optical source for over four years. Due to the low distance to the source and its intrinsically high…

High Energy Astrophysical Phenomena · Physics 2025-07-16 Joe S. Bright , Rob Fender , David M. Russell , Sara E. Motta , Ethan Man , Jakob van den Eijnden , Kevin Alabarta , Justine Crook-Mansour , Maria C. Baglio , David A. Green , Ian Heywood , Fraser Lewis , Payaswini Saikia , Paul F. Scott , David J. Titterington

Broadband variability study of MAXI J1631-479 in its Hard-Intermediate State observed with Insight-HXMT

We report the energy-resolved broadband timing analysis of the black hole X-ray transient MAXI J1631-479 during its 2019 outburst from February 11 to April 9, using data from the Insight-Hard X-ray Modulation Telescope (Insight-HXMT), which…

High Energy Astrophysical Phenomena · Physics 2021-10-04 Q. C. Bu , S. N. Zhang , A. Santangelo , T. M. Belloni , L. Zhang , J. L. Qu , L. Tao , Y. Huang , X. Ma , Z. S. Li , S. Zhang , L. Chen , the Insight-HMXT collaboration

X-ray and Optical Monitoring of State Transitions in MAXI J1820+070

We report results from the X-ray and optical monitoring of the black hole candidate MAXI J1820+070 (=ASSASN-18ey) over the entire period of its outburst from March to October 2018.In this outburst, the source exhibited two sets of `fast…

High Energy Astrophysical Phenomena · Physics 2019-04-17 Megumi Shidatsu , Satoshi Nakahira , Katsuhiro L. Murata , Ryo Adachi , Nobuyuki Kawai , Yoshihiro Ueda , Hitoshi Negoro

Multiwavelength observations of MAXI J1820+070 during its outburst decay and subsequent mini-outburst

We present results from quasi-simultaneous multiwavelength observations of the Galactic black hole X-ray transient MAXI J1820$+$070 during the decay of the 2018 outburst and its entire subsequent mini-outburst in March 2019. We fit the…

High Energy Astrophysical Phenomena · Physics 2022-07-06 M. Özbey Arabacı , E. Kalemci , T. Dinçer , C. Bailyn , D. Altamirano , T. Ak

The evolution of the broadband temporal features observed in the black-hole transient MAXI J1820+070 with Insight-HXMT

We study the evolution of the temporal properties of MAXI 1820+070 during the 2018 outburst in its hard state from MJD 58190 to 58289 with Insight-HXMT in a broad energy band 1-150 keV. We find different behaviors of the hardness ratio, the…

High Energy Astrophysical Phenomena · Physics 2020-06-17 Yanan Wang , Long Ji , S. N. Zhang , Mariano Méndez , J. L. Qu , Pierre Maggi , M. Y. Ge , Erlin Qiao , L. Tao , S. Zhang , Diego Altamirano , L. Zhang , X. Ma , F. J. Lu , T. P. Li , Y. Huang , S. J. Zheng , Y. P. Chen , Z. Chang , Y. L. Tuo , C. Gungor , L. M. Song , Y. P. Xu , X. L. Cao , Y. Chen , C. Z. Liu , Q. C. Bu , C. Cai , G. Chen , L. Chen , T. X. Chen , Y. B. Chen , W. Cui , W. W. Cui , J. K. Deng , Y. W. Dong , Y. Y. Du , M. X. Fu , G. H. Gao , H. Gao , M. Gao , Y. D. Gu , J. Guan , C. C. Guo , D. W. Han , J. Huo , S. M. Jia , L. H. Jiang , W. C. Jiang , J. Jin , Y. J. Jin , L. D. Kong , B. Li , C. K. Li , G. Li , M. S. Li , W. Li , X. Li , X. B. Li , X. F. Li , Y. G. Li , Z. W. Li , X. H. Liang , J. Y. Liao , G. Q. Liu , H. W. Liu , X. J. Liu , Y. N. Liu , B. Lu , X. F. Lu , Q. Luo , T. Luo , B. Meng , Y. Nang , J. Y. Nie , G. Ou , N. Sai , R. C. Shang , X. Y. Song , L. Sun , Y. Tan , G. F. Wang , J. Wang , W. S. Wang , Y. D. Wang , Y. S. Wang , X. Y. Wen , B. B. Wu , B. Y. Wu , M. Wu , G. C. Xiao , S. Xiao , S. L. Xiong , J. W. Yang , S. Yang , Y. J. Yang , Q. B. Yi , Q. Q. Yin , Y. You , A. M. Zhang , C. M. Zhang , F. Zhang , H. M. Zhang , J. Zhang , T. Zhang , W. C. Zhang , W. Zhang , W. Z. Zhang , Y. Zhang , Y. F. Zhang , Y. J. Zhang , Y. Zhang , Z. Zhang , Z. L. Zhang , H. S. Zhao , X. F. Zhao , D. K. Zhou , J. F. Zhou , R. L. Zhuang , Y. X. Zhu , Y. Zhu

A multi-wavelength study of the hard and soft states of MAXI J1820+070 during its 2018 outburst

We present a comprehensive multi-wavelength spectral analysis of the black hole X-ray binary MAXI J1820+070 during its 2018 outburst, utilizing AstroSat far UV, soft and hard X-ray data, along with (quasi-)simultaneous optical and X-ray…

High Energy Astrophysical Phenomena · Physics 2024-06-19 Srimanta Banerjee , Gulab C. Dewangan , Christian Knigge , Maria Georganti , Poshak Gandhi , N. P. S. Mithun , Payaswini Saikia , Dipankar Bhattacharya , David M. Russell , Fraser Lewis , Andrzej A. Zdziarski

Evidence for enhanced mass transfer in the disc preceding the transition to the soft state in MAXI J1820+070

We investigate the 2018-2019 main outburst and the subsequent mini-outbursts of the black hole low-mass X-ray binary MAXI J1820+070 using optical/ultraviolet data from the Las Cumbres Observatory (LCO), the American Association of Variable…

High Energy Astrophysical Phenomena · Physics 2025-07-02 Pengcheng Yang , Guobao Zhang , David M. Russell , Mariano Méndez , M. Cristina Baglio , Diego Altamirano , Yijung Yang , Payaswini Saikia , Kevin Alabarta

The Soft State of the Black Hole Transient Source MAXI J1820+070: Emission from the Edge of the Plunge Region?

The Galactic black hole X-ray binary MAXI J1820+070 had a bright outburst in 2018 when it became the second brightest X-ray source in the Sky. It was too bright for X-ray CCD instruments such as XMM-Newton and Chandra, but was well observed…

High Energy Astrophysical Phenomena · Physics 2020-03-04 A. C. Fabian , D. J Buisson , P. Kosec , C. S. Reynolds , D. R. Wilkins , J. A. Tomsick , D. J. Walton , P. Gandhi , D. Altamirano , Z. Arzoumanian , E. M. Cackett , S. Dyda , J. A. Garcia , K. C. Gendreau , B. W Grefenstette , F. A. Harrison , J. Homan , E. Kara , R. M. Ludlam , J. M. Miller , J. F. Steiner

MAXI J1820+070 X-ray spectral-timing reveals the nature of the accretion flow in black hole binaries

Black hole X-ray binaries display significant stochastic variability on short time-scales (0.01-100 seconds), with a complex pattern of lags in correlated variability seen in different energy bands. This behaviour is generally interpreted…

High Energy Astrophysical Phenomena · Physics 2023-01-18 Tenyo Kawamura , Chris Done , Magnus Axelsson , Tadayuki Takahashi

A Phase-resolved View of the Low-frequency Quasiperiodic Oscillations from the Black Hole Binary MAXI J1820+070

Although low-frequency quasiperiodic oscillations (LFQPOs) are commonly detected in the X-ray light curves of accreting black hole X-ray binaries, their origin still remains elusive. In this study, we conduct phase-resolved spectroscopy in…

High Energy Astrophysical Phenomena · Physics 2023-11-10 Qing C. Shui , S. Zhang , Shuang N. Zhang , Yu P. Chen , Ling D. Kong , Peng J. Wang , Jing Q. Peng , L. Ji , A. Santangelo , Hong X. Yin , Jin L. Qu , L. Tao , Ming Y. Ge , Y. Huang , L. Zhang , Hong H. Liu , P. Zhang , W. Yu , Z. Chang , J. Li , Wen T. Ye , Pan P. Li , Zhuo L. Yu , Z. Yan

Radio flaring and dual radio loud/quiet behaviour in the new candidate black hole X-ray binary MAXI J1631-472

We present the results of a weekly monitoring of the new black hole candidate X-ray binary MAXI J1631-472 carried out with the MeerKAT radio interferometer, the Neil Gehrels Swift Observatory, and the Monitor of All-sky X-ray Image (MAXI)…

High Energy Astrophysical Phenomena · Physics 2021-01-20 Itumeleng M. Monageng , Sara E. Motta , Rob Fender , Wenfei Yu , Patrick A. Woudt , Evangelia Tremou , James C. A. Miller-Jones , Alexander J. van der Horst

Observations of the Disk/Jet Coupling of MAXI J1820+070 During its Descent to Quiescence

Black hole X-ray binaries in the quiescent state (Eddington ratios typically $\lesssim$10$^{-5}$) display softer X-ray spectra (photon indices $\Gamma\sim2$) compared to higher-luminosity black hole X-ray binaries in the hard state…

High Energy Astrophysical Phenomena · Physics 2021-03-17 A. W. Shaw , R. M. Plotkin , J. C. A. Miller-Jones , J. Homan , E. Gallo , D. M. Russell , J. A. Tomsick , P. Kaaret , S. Corbel , M. Espinasse , J. Bright

X-ray, Optical, and Near-infrared Monitoring of the New X-ray Transient MAXI J1820+070 in the Low/hard State

We report X-ray, optical, and near-infrared monitoring of the new X-ray transient MAXI J1820$+$070 discovered with MAXI on 2018 March 11. Its X-ray intensity reached $\sim 2$ Crab in 2--20 keV at the end of March, and then gradually…

High Energy Astrophysical Phenomena · Physics 2018-11-28 Megumi Shidatsu , Satoshi Nakahira , Satoshi Yamada , Taiki Kawamuro , Yoshihiro Ueda , Hitoshi Negoro , Katsuhiro L. Murata , Ryosuke Itoh , Yutaro Tachibana , Ryo Adachi , Yoichi Yatsu , Nobuyuki Kawai , Hidekazu Hanayama , Takashi Horiuchi , Hiroshi Akitaya , Tomoki Saito , Masaki Takayama , Tomohito Ohshima , Noriyuki Katoh , Jun Takahashi , Takahiro Nagayama , Masayuki Yamanaka , Miho Kawabata , Tatsuya Nakaoka , Seiko Takagi , Tomoki Morokuma , Kumiko Morihana , Hiroyuki Maehara , Kazuhiro Sekiguchi

A NICER Discovery of a Low-Frequency Quasi-Periodic Oscillation in the Soft-Intermediate State of MAXI J1535-571

We present the discovery of a low-frequency $\approx 5.7$ Hz quasi-periodic oscillation (QPO) feature in observations of the black hole X-ray binary MAXI J1535-571 in its soft-intermediate state, obtained in September-October 2017 by the…

High Energy Astrophysical Phenomena · Physics 2018-10-10 A. L. Stevens , P. Uttley , D. Altamirano , Z. Arzoumanian , P. Bult , E. M. Cackett , A. C. Fabian , K. C. Gendreau , K. Q. Ha , J. Homan , A. R. Ingram , E. Kara , J. Kellogg , R. M. Ludlam , J. M. Miller , J. Neilsen , D. R. Pasham , R. A. Remillard , J. F. Steiner , J. van den Eijnden

Fast transition of type-B QPO in the black hole transient XTE J1817-330

The evolution of different types of quasi-periodic oscillations (QPOs) and the coupled radiative/physical changes in the accretion disk are still poorly understood. In a few black hole binaries it was found that fast evolution of QPOs is…

High Energy Astrophysical Phenomena · Physics 2015-06-04 K. Sriram , A. R. Rao , C. S. Choi

Large optical modulations during 2018 outburst of MAXI J1820+070 reveal evolution of warped accretion disc through X-ray state change

The black-hole X-ray transient MAXI J1820+07 (=ASSASN-18ey) discovered in March 2018 was one of the optically brightest ever seen, which has resulted in very detailed optical outburst light-curves being obtained. We combine them here with…

High Energy Astrophysical Phenomena · Physics 2021-11-03 Jessymol K. Thomas , Philip A. Charles , David A. H. Buckley , Marissa M. Kotze , Jean-Pierre Lasota , Stephen B. Potter , James F. Steiner , John A. Paice