相关论文: Opacity effects and shock-in-jet modelling of low-…

Furiously Fast and Red: Sub-second Optical Flaring in V404 Cyg during the 2015 Outburst Peak

We present observations of rapid (sub-second) optical flux variability in V404 Cyg during its 2015 June outburst. Simultaneous three-band observations with the ULTRACAM fast imager on four nights show steep power spectra dominated by slow…

高能天体物理现象 · 物理学 2016-03-23 P. Gandhi , S. P. Littlefair , L. K. Hardy , V. S. Dhillon , T. R. Marsh , A. W. Shaw , D. Altamirano , M. D. Caballero-Garcia , J. Casares , P. Casella , A. J. Castro-Tirado , P. A. Charles , Y. Dallilar , S. Eikenberry , R. P. Fender , R. I. Hynes , C. Knigge , E. Kuulkers , K. Mooley , T. Muñoz-Darias , M. Pahari , F. Rahoui , D. M. Russell , J. V. Hernández Santisteban , T. Shahbaz , D. M. Terndrup , J. Tomsick , D. J. Walton

Intranight variability of 3C 454.3 during its 2010 November outburst

Context. 3C 454.3 is a very active flat spectrum radio quasar (blazar) that has undergone a recent outburst in all observed bands, including the optical. Aims. In this work we explore the short-term optical variability of 3C 454.3 during…

高能天体物理现象 · 物理学 2015-05-27 R. Bachev , E. Semkov , A. Strigachev , B. Mihov , A. C. Gupta , S. Peneva , E. Ovcharov , A. Valcheva , A. Lalova

Spectral Analysis of Cyg X-3 using simultaneous AstroSat and Insight-HXMT Observations

We present the results from the spectral analysis of Cygnus X-3 using simultaneous data from AstroSat and Insight-HXMT during its soft state. A pure reflection spectrum, including emission lines of iron, silica, and sulfur, provides a good…

高能天体物理现象 · 物理学 2025-07-02 Suraj K. Chaurasia , Gitika Mall , Ruchika Dhaka , Ranjeev Misra , Amit Pathak

The hypersoft state of Cygnus X-3 - A key to jet quenching in X-ray binaries?

Cygnus X-3 is a unique microquasar in the Galaxy hosting a Wolf-Rayet companion orbiting a compact object that most likely is a low-mass black hole. The unique source properties are likely due to the interaction of the compact object with…

高能天体物理现象 · 物理学 2018-04-18 K. I. I. Koljonen , T. Maccarone , M. L. McCollough , M. Gurwell , S. A. Trushkin , G. G. Pooley , G. Piano , M. Tavani

Discovery of Correlated Behavior Between the HXR and the Radio Bands in Cygnus X-3

Using CGRO/BATSE hard X-ray (HXR) data and GHz radio monitoring data from the Green Bank Interferometer (GBI), we have performed a long term study ($\sim$ 1800 days) of the unusual X-ray binary Cyg X-3 resulting in the discovery of a…

天体物理学 · 物理学 2009-10-31 M. L. McCollough , C. R. Robinson , S. N. Zhang , B. A. Harmon , R. M. Hjellming , E. B. Waltman , R. S. Foster , F. D. Ghigo , M. S. Briggs , G. N. Pendleton , K. J. Johnston

Long-term multi-frequency monitoring of microquasars

We discuss the results of the radio studies of the X-ray binaries with relativistic jets. We carried out a multi-frequency (1-30 GHz) daily monitoring of the radio flux variability of the microquasars SS433, GRS1915+105, and Cyg X-3 with…

天体物理学 · 物理学 2009-06-25 Sergei A. Trushkin , Nikolaj A. Nizhelskij , Nikolaj N. Bursov

X-ray Flux and Spectral Variability of the Blazar OJ 287 with Suzaku

We present analyses of Suzaku XIS light curves and spectra of the BL Lac object OJ 287 with observations positioned primarily around proposed recurrent optical outbursts. The first two observations were performed in 2007 April 10 - 13…

高能天体物理现象 · 物理学 2024-08-06 Dongtao Zhou , Zhongli Zhang , Alok C. Gupta , Pankaj Kushwaha , Paul J. Wiita , Minfeng Gu , Haiguang Xu

Spectro-timing analysis of Cygnus X-1 during a fast state transition

We present the analysis of two long, quasi-uninterrupted RXTE observations of Cygnus X-1 that span several days within a 10 d interval. The spectral characteristics during this observation cover the region where previous observations have…

高能天体物理现象 · 物理学 2015-05-28 Moritz Boeck , Victoria Grinberg , Katja Pottschmidt , Manfred Hanke , Michael A. Nowak , Sera B. Markoff , Phil Uttley , Jerome Rodriguez , Guy G. Pooley , Slawomir Suchy , Richard E. Rothschild , Joern Wilms

Modelling the submillimetre-to-radio flaring behaviour of 3C 273

We present a new approach to derive the observed properties of synchrotron outbursts in relativistic jets. The idea is to use the very well sampled submillimetre-to-radio long-term light curves of 3C 273 to extract the spectral and temporal…

天体物理学 · 物理学 2011-05-23 M. Turler , T. J. -L. Courvoisier , S. Paltani

Time Domain Analysis of Variability in Cygnus X-1: Constraints on the Emission Models

We use time domain analysis techniques to investigate the rapid variability of Cygnus X-1. We show that the cross-correlation functions between hard and soft energy bands reach values very close to unity and peak at a lag of less than 2…

天体物理学 · 物理学 2009-10-31 Thomas J. Maccarone , Paolo S. Coppi , Juri Poutanen

Optical and Radio Variability of BL Lacertae

We observed the prototype blazar, BL Lacertae, extensively in optical and radio bands during an active phase in the period 2010--2013 when the source showed several prominent outbursts. We searched for possible correlations and time lags…

高能天体物理现象 · 物理学 2015-10-28 Haritma Gaur , Alok C. Gupta , R. Bachev , A. Strigachev , E. Semkov , Paul J. Wiita , A. E. Volvach , Minfeng Gu , A. Agarwal , I. Agudo , M. F. Aller , H. D. Aller , O. M. Kurtanidze , S. O. Kurtanidze , A. Lahteenmaki , S. Peneva , M. G. Nikolashvili , L. A. Sigua , M. Tornikoski , L. N. Volvach

Unprecedentedly bright X-ray flaring in Cygnus X-1 observed by INTEGRAL

We study three extraordinarily bright X-ray flares originating from Cyg X-1 seen on 2023 July 10 detected with INTEGRAL. The flares had a duration on the order of only ten minutes each, and within seconds reached a 1-100 keV peak luminosity…

高能天体物理现象 · 物理学 2025-11-12 P. Thalhammer , T. Bouchet , J. Rodriguez , F. Cangemi , K. Pottschmidt , D. A. Green , L. Rhodes , C. Ferrigno , M. A. Nowak , V. Grinberg , T. Siegert , P. Laurent , I. Kreykenbohm , M. Perucho , J. Tomsick , C. Sánchez-Fernández , J. Wilms C. Sánchez-Fernández , J. Wilms

Long term variability of Cygnus X-1, III. Radio-X-ray correlations

Long time scale radio-X-ray correlations in black holes during the hard state have been found in many sources and there seems to emerge a universal underlying relationship which quantitatively describes this behavior. Although it would…

天体物理学 · 物理学 2009-11-10 T. Gleissner , J. Wilms , G. G. Pooley , M. A. Nowak , K. Pottschmidt , S. Markoff , S. Heinz , M. Klein-Wolt , R. P. Fender , R. Staubert

2006 May-July Major Radio Flare episodes in Cygnus X-3: spectro-timing analysis of the X-ray data

We analyse in detail the X-ray data of the microquasar Cygnus X-3 obtained during major radio flaring episodes in 2006 with multiple observatories. The analysis consists of two parts: probing the fast (~ 1 minute) X-ray spectral evolution…

高能天体物理现象 · 物理学 2015-06-12 K. I. I. Koljonen , M. L. McCollough , D. C. Hannikainen , R. Droulans

Cygnus X-3: A variable petaelectronvolt gamma-ray source

We report the discovery of variable $\gamma$-rays up to petaelectronvolt from Cygnus X-3, an iconic X-ray binary. The $\gamma$-ray signal was detected with a statistical significance of approximately 10 $\sigma$ by the Large High Altitude…

高能天体物理现象 · 物理学 2026-04-14 The LHAASO Collaboration , Zhen Cao , F. Aharonian , Y. X. Bai , Y. W. Bao , D. Bastieri , X. J. Bi , Y. J. Bi , W. Bian , J. Blunier , A. V. Bukevich , C. M. Cai , Y. Y. Cai , W. Y. Cao , Zhe Cao , J. Chang , J. F. Chang , E. S. Chen , G. H. Chen , H. K. Chen , L. F. Chen , Liang Chen , Long Chen , M. J. Chen , M. L. Chen , Q. H. Chen , S. Chen , S. H. Chen , S. Z. Chen , T. L. Chen , X. B. Chen , X. J. Chen , X. P. Chen , Y. Chen , N. Cheng , Q. Y. Cheng , Y. D. Cheng , M. Y. Cui , S. W. Cui , X. H. Cui , Y. D. Cui , B. Z. Dai , H. L. Dai , Z. G. Dai , Danzengluobu , Y. X. Diao , A. J. Dong , X. Q. Dong , K. K. Duan , J. H. Fan , Y. Z. Fan , J. Fang , J. H. Fang , K. Fang , C. F. Feng , H. Feng , L. Feng , S. H. Feng , X. T. Feng , Y. Feng , Y. L. Feng , S. Gabici , B. Gao , Q. Gao , W. Gao , W. K. Gao , M. M. Ge , T. T. Ge , L. S. Geng , G. Giacinti , G. H. Gong , Q. B. Gou , M. H. Gu , F. L. Guo , J. Guo , K. J. Guo , X. L. Guo , Y. Q. Guo , Y. Y. Guo , R. P. Han , O. A. Hannuksela , M. Hasan , H. H. He , H. N. He , J. Y. He , X. Y. He , Y. He , S. Hernández-Cadena , B. W. Hou , C. Hou , X. Hou , H. B. Hu , S. C. Hu , C. Huang , D. H. Huang , J. J. Huang , X. L. Huang , X. T. Huang , X. Y. Huang , Y. Huang , Y. Y. Huang , A. Inventar , X. L. Ji , H. Y. Jia , K. Jia , H. B. Jiang , K. Jiang , X. W. Jiang , Z. J. Jiang , M. Jin , S. Kaci , M. M. Kang , I. Karpikov , D. Khangulyan , D. Kuleshov , K. Kurinov , Cheng Li , Cong Li , D. Li , F. Li , H. B. Li , H. C. Li , Jian Li , Jie Li , K. Li , L. Li , R. L. Li , S. D. Li , T. Y. Li , W. L. Li , X. R. Li , Xin Li , Y. Li , Zhe Li , Zhuo Li , E. W. Liang , Y. F. Liang , S. J. Lin , B. Liu , C. Liu , D. Liu , D. B. Liu , H. Liu , J. Liu , J. L. Liu , J. R. Liu , M. Y. Liu , R. Y. Liu , S. M. Liu , W. Liu , X. Liu , Y. Liu , Y. Liu , Y. N. Liu , Y. Q. Lou , Q. Luo , Y. Luo , H. K. Lv , B. Q. Ma , L. L. Ma , X. H. Ma , I. O. Maliy , J. R. Mao , Z. Min , W. Mitthumsiri , Y. Mizuno , G. B. Mou , A. Neronov , K. C. Y. Ng , M. Y. Ni , L. Nie , L. J. Ou , Z. W. Ou , P. Pattarakijwanich , Z. Y. Pei , D. Y. Peng , J. C. Qi , M. Y. Qi , J. J. Qin , D. Qu , A. Raza , C. Y. Ren , D. Ruffolo , A. Sáiz , D. Savchenko , D. Semikoz , L. Shao , O. Shchegolev , Y. Z. Shen , X. D. Sheng , Z. D. Shi , F. W. Shu , H. C. Song , Yu. V. Stenkin , V. Stepanov , Y. Su , D. X. Sun , H. Sun , J. X. Sun , Q. N. Sun , X. N. Sun , Z. B. Sun , N. H. Tabasam , J. Takata , P. H. T. Tam , H. B. Tan , Q. W. Tang , R. Tang , Z. B. Tang , W. W. Tian , C. N. Tong , L. H. Wan , C. Wang , D. H. Wang , G. W. Wang , H. G. Wang , J. C. Wang , K. Wang , Kai Wang , Kai Wang , L. P. Wang , L. Y. Wang , L. Y. Wang , R. Wang , W. Wang , X. G. Wang , X. J. Wang , X. Y. Wang , Y. Wang , Y. D. Wang , Z. H. Wang , Z. X. Wang , Zheng Wang , D. M. Wei , J. J. Wei , Y. J. Wei , T. Wen , S. S. Weng , C. Y. Wu , H. R. Wu , Q. W. Wu , S. Wu , X. F. Wu , Y. S. Wu , S. Q. Xi , J. Xia , J. J. Xia , G. M. Xiang , D. X. Xiao , G. Xiao , Y. F. Xiao , Y. L. Xin , H. D. Xing , Y. Xing , D. R. Xiong , B. N. Xu , C. Y. Xu , D. L. Xu , R. F. Xu , R. X. Xu , S. S. Xu , W. L. Xu , L. Xue , D. H. Yan , T. Yan , C. W. Yang , C. Y. Yang , F. F. Yang , L. L. Yang , M. J. Yang , R. Z. Yang , W. X. Yang , Z. H. Yang , Z. G. Yao , X. A. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Q. Yuan , H. Yue , H. D. Zeng , T. X. Zeng , W. Zeng , X. T. Zeng , M. Zha , B. B. Zhang , B. T. Zhang , C. Zhang , H. Zhang , H. M. Zhang , H. Y. Zhang , J. L. Zhang , J. Y. Zhang , Li Zhang , P. F. Zhang , R. Zhang , S. R. Zhang , S. S. Zhang , S. Y. Zhang , W. Zhang , W. Y. Zhang , X. Zhang , X. P. Zhang , Yi Zhang , Yong Zhang , Z. P. Zhang , J. Zhao , L. Zhao , L. Z. Zhao , S. P. Zhao , X. H. Zhao , Z. H. Zhao , F. Zheng , T. C. Zheng , B. Zhou , H. Zhou , J. N. Zhou , M. Zhou , P. Zhou , R. Zhou , X. X. Zhou , X. X. Zhou , B. Y. Zhu , C. G. Zhu , F. R. Zhu , H. Zhu , K. J. Zhu , Y. C. Zou , X. Zuo , J. S. Wang

A Hidden Pulse: Uncovering a New Timing Signal in Cygnus X-1 with AstroSat

The study of fast variability properties in X-ray binaries advances our understanding of the physical processes and geometric properties of the accretion flow around the compact object. In this work, we study the evolution of the timing…

高能天体物理现象 · 物理学 2025-08-27 Sandeep K. Rout , Federico Garcia , Mariano Mendez , Abhay Kumar , Santosh Vadawale , David M. Russell , Pei Jin

Cygnus X-3 transition from the ultrasoft to the hard state

Aims: The nature of Cygnus X-3 is still not understood well. This binary system might host a black hole or a neutron star. Recent observations by INTEGRAL have shown that Cygnus X-3 was again in an extremely ultrasoft state. Here we present…

天体物理学 · 物理学 2009-11-13 V. Beckmann , S. Soldi , G. Belanger , S. Brandt , M. D. Caballero-Garcia , G. De Cesare , N. Gehrels , S. Grebenev , O. Vilhu , A. von Kienlin , T. J. -L. Courvoisier

A decade of radio imaging the relativistic outflow in the peculiar X-ray binary Circinus X-1

We present observations of the neutron star X-ray binary and relativistic jet source Circinus X-1 made at 4.8 and 8.6 GHz with the Australia Telescope Compact Array during a time interval of almost 10 years. The system shows significant…

天体物理学 · 物理学 2009-11-13 V. Tudose , R. P. Fender , A. K. Tzioumis , R. E. Spencer , M. van der Klis

The multiwavelength variability of 3C 273

We present an update of 3C 273's database hosted by the ISDC, completed with data from radio to gamma-ray observations over the last 10 years. We use this large data set to study the multiwavelength properties of this quasar,especially…

天体物理学 · 物理学 2009-11-13 S. Soldi , M. Türler , S. Paltani , H. D. Aller , M. F. Aller , G. Burki , M. Chernyakova , A. Lähteenmäki , I. M. McHardy , E. I. Robson , R. Staubert , M. Tornikoski , R. Walter , T. J. -L. Courvoisier

Broadband variability and correlation study of 3C 279 during flare of 2017-2018

A multiwavelength temporal and spectral analysis of flares of 3C 279 during November 2017--July 2018 are presented in this work. Three bright gamma-ray flares were observed simultaneously in X-ray and Optical/UV along with a prolonged…

高能天体物理现象 · 物理学 2020-03-04 Raj Prince