Related papers: Supergiant Fast X-ray Transients

A fast X-ray transient from a weak relativistic jet associated with a type Ic-BL supernova

Massive stars end their lives as core-collapse supernovae, amongst which some extremes are broad-lined type Ic supernovae from Wolf-Rayet stars associated with long-duration gamma-ray bursts (LGRBs) having powerful relativistic jets. Their…

High Energy Astrophysical Phenomena · Physics 2025-07-15 H. Sun , W. -X. Li , L. -D. Liu , H. Gao , X. -F. Wang , W. Yuan , B. Zhang , A. V. Filippenko , D. Xu , T. An , S. Ai , T. G. Brink , Y. Liu , Y. -Q. Liu , C. -Y. Wang , Q. -Y. Wu , X. -F. Wu , Y. Yang , B. -B. Zhang , W. -K. Zheng , T. Ahumada , Z. -G. Dai , J. Delaunay , N. Elias-Rosa , S. Benetti , S. -Y. Fu , D. A. Howell , Y. -F. Huang , M. M. Kasliwal , V. Karambelkar , R. Stein , W. -H. Lei , T. -Y. Lian , Z. -K. Peng , D. D. Frederiks , A. V. Ridnaia , D. S. Svinkin , X. -Y. Wang , A. -L. Wang , D. -M. Wei , J. An , M. Andrews , J. -M Bai , C. -Y. Dai , S. A. Ehgamberdiev , Z. Fan , J. Farah , H. -C. Feng , J. P. U. Fynbo , W. -J. Guo , Z. Guo , M. -K. Hu , J. -W. Hu , S. -Q. Jiang , J. -J. Jin , A. Li , J. -D. Li , R. -Z. Li , Y. -F. Liang , Z. -X. Ling , X. Liu , J. -R. Mao , C. McCully , D. Mirzaqulov , M. Newsome , E. Padilla Gonzalez , X. Pan , G. Terreran , S. Tinyanont , B. -T. Wang , L. -Z. Wang , X. -D. Wen , D. -F. Xiang , S. -J. Xue , J. Yang , Z. -P. Zhu , Z. -M. Cai , A. J. Castro-Tirado , F. -S. Chen , H. -L. Chen , T. -X. Chen , W. Chen , Y. -H. Chen , Y. -F. Chen , Y. Chen , H. -Q. Cheng , B. Cordier , C. -Z. Cui , W. -W. Cui , Y. -F. Dai , D. -W. Fan , H. Feng , J. Guan , D. -W. Han , D. -J. Hou , H. -B. Hu , M. -H. Huang , J. Huo , S. -M. Jia , Z. -Q. Jia , B. -W. Jiang , C. -C. Jin , G. Jin , E. Kuulkers , C. -K. Li , D. -Y. Li , J. -F. Li , L. -H. Li , M. -S. Li , W. Li , Z. -D. Li , C. -Z Liu , H. -Y. Liu , H. -Q. Liu , M. -J. Liu , F. -J. Lu , L. -D. Luo , J. Ma , X. Mao , K. Nandra , P. O'Brien , H. -W. Pan , A. Rau , N. Rea , J. Sanders , L. -M. Song , S. -L. Sun , X. -J. Sun , Y. -Y. Tan , Q. -J. Tang , Y. -H. Tao , H. Wang , J. Wang , L. Wang , W. -X. Wang , Y. -L. Wang , Y. -S. Wang , D. -R. Xiong , H. -T. Xu , J. -J. Xu , X. -P. Xu , Y. -F. Xu , Z. Xu , C. -B. Xue , Y. -L. Xue , A. -L. Yan , H. -N. Yang , X. -T. Yang , Y. -J. Yang , C. Zhang , J. Zhang , M. Zhang , S. -N. Zhang , W. -D. Zhang , W. -J. Zhang , Y. -H. Zhang , Z. Zhang , Z. Zhang , Z. -L. Zhang , D. -H. Zhao , H. -S. Zhao , X. -F. Zhao , Z. -J. Zhao , Y. -L. Zhou , Y. -X. Zhu , Z. -C. Zhu , H. Zou

INTEGRAL sources: from obscured high mass X-ray binaries to supergiant fast X-ray transients

A new type of high-energy binary system has been revealed by the INTEGRAL satellite. These sources are being unveiled by means of multi-wavelength optical, near- and mid-infrared observations. Among these sources, two distinct classes are…

Astrophysics · Physics 2008-09-08 S. Chaty

Discovery of the optical and radio counterpart to the fast X-ray transient EP240315a

Fast X-ray Transients (FXTs) are extragalactic bursts of soft X-rays first identified >10 years ago. Since then, nearly 40 events have been discovered, although almost all of these have been recovered from archival Chandra and XMM-Newton…

High Energy Astrophysical Phenomena · Physics 2024-06-21 J. H. Gillanders , L. Rhodes , S. Srivastav , F. Carotenuto , J. Bright , M. E. Huber , H. F. Stevance , S. J. Smartt , K. C. Chambers , T. -W. Chen , R. Fender , A. Andersson , A. J. Cooper , P. G. Jonker , F. J. Cowie , T. deBoer , N. Erasmus , M. D. Fulton , H. Gao , J. Herman , C. -C. Lin , T. Lowe , E. A. Magnier , H. -Y. Miao , P. Minguez , T. Moore , C. -C. Ngeow , M. Nicholl , Y. -C. Pan , G. Pignata , A. Rest , X. Sheng , I. A. Smith , K. W. Smith , J. L. Tonry , R. J. Wainscoat , J. Weston , S. Yang , D. R. Young

The INTEGRAL legacy on High Mass X-ray Binaries

Observations with the INTEGRAL satellite have quadrupled the population of supergiant High Mass X-ray Binaries (HMXBs), revealed a previously hidden population of obscured supergiant HMXBs, and allowed the discovery of huge and fast…

High Energy Astrophysical Phenomena · Physics 2010-12-13 Sylvain Chaty , Juan Antonio Zurita Heras , Arash Bodaghee

Multi-wavelength observations of IGR J17544-2619 from quiescence to outburst

In this paper we report on a long multi-wavelength observational campaign of the supergiant fast X-ray transient prototype IGR J17544-2619. A 150 ks-long observation was carried out simultaneously with XMM-Newton and NuSTAR, catching the…

High Energy Astrophysical Phenomena · Physics 2016-12-07 E. Bozzo , V. Bhalerao , P. Pradhan , J. Tomsick , P. Romano , C. Ferrigno , S. Chaty , L. Oskinova , A. Manousakis , R. Walter , M. Falanga , S. Campana , L. Stella , M. Ramolla , R. Chini

Soft X-ray follow-up of five hard X-ray emitters

We studied the soft-X-ray emission of five hard-X sources: IGR J08262-3736, IGR J17354-3255, IGR J16328-4726, SAX J1818.6-1703 and IGR J17348-2045. These sources are: a confirmed supergiant high mass X-ray binary (IGR J08262-3736);…

High Energy Astrophysical Phenomena · Physics 2013-03-20 L. Pavan , E. Bozzo , C. Ferrigno , M. Falanga , S. Campana , S. Paltani , L. Stella , R. Walter

The Swift Bulge Survey: Motivation, Strategy, and First X-ray Results

Very faint X-ray transients (VFXTs) are X-ray transients with peak X-ray luminosities ($L_X$) of $L_X\lesssim10^{36}$ erg/s, which are not well-understood. We carried out a survey of 16 square degrees of the Galactic Bulge with the Swift…

High Energy Astrophysical Phenomena · Physics 2020-12-23 A. Bahramian , C. O. Heinke , J. A. Kennea , T. J. Maccarone , P. A. Evans , R. Wijnands , N. Degenaar , J. J. M. in't Zand , A. W. Shaw , L. E. Rivera Sandoval , S. McClure , A. J. Tetarenko , J. Strader , E. Kuulkers , G. R. Sivakoff

X-ray transient AGN and galaxies, and why we need new soft X-ray surveys

X-ray transience is the most extreme form of variability observed in AGN or normal non-active galaxies. While factors of 2-3 on timescales of days to years are quite common among AGN, X-ray transients appear only once and vanish from the…

Astrophysics · Physics 2007-05-23 D. Grupe

High Mass X-ray Binaries: Progenitors of double neutron star systems

In this review I briefly describe the nature of the three kinds of High-Mass X-ray Binaries (HMXBs), accreting through: (i) Be circumstellar disc, (ii) supergiant stellar wind, and (iii) Roche lobe filling supergiants. A previously unknown…

High Energy Astrophysical Phenomena · Physics 2020-11-11 Sylvain Chaty

Supergiant, fast, but not so transient 4U 1907+09

We have investigated the dipping activity observed in the high-mass X-ray binary 4U 1907+09 and shown that the source continues to pulsate in the "off" state, noting that the transition between the "on" and "off" states may be either…

High Energy Astrophysical Phenomena · Physics 2012-10-17 V. Doroshenko , A. Santangelo , L. Ducci , D. Klochkov

Multiwavelength observations revealing the outbursts of the two soft X-ray transients XTE J1859+226 and XTE J1118+480

We report here on multiwavelength observations of the two new soft X-ray transients (SXTs) XTE J1859+226 and XTE J1118+480, which we observed with HST/RXTE/UKIRT. For XTE J1118+480 we also used EUVE since it is located at a very high…

Astrophysics · Physics 2007-05-23 S. Chaty , C. A. Haswell , R. I. Hynes , C. R. Shrader , W. Cui , C. W. Mauche , A. J. Norton , J. -E. Solheim , R. Ostensen , T. R. Geballe , Z. Ioannou , A. R. King

Fast Extragalactic X-ray Transients From Gamma Ray Bursts Viewed Far Off Axis

The observed lightcurves and estimated sky rate of fast extragalactic x-ray transients (XRTs) discovered in archival Chandra data indicate that they belong to two distinct XRT populations. The first population of relatively short duration…

High Energy Astrophysical Phenomena · Physics 2019-11-19 Shlomo Dado , Arnon Dar

Transients Among Binaries with Evolved Low-Mass Companions

We show that stable disk accretion should be very rare among low-mass X-ray binaries and cataclysmic variables whose evolution is driven by the nuclear expansion of the secondary star on the first giant branch. Stable accretion is confined…

Astrophysics · Physics 2009-10-30 A. R. King , J. Frank , U. Kolb , H. Ritter

Discovery of a 30 day period in the supergiant fast X-ray transient SAX J1818.6-1703

SAX J1818.6-1703 has been characterised as a Supergiant Fast X-ray Transient system on the basis of several INTEGRAL/IBIS detections since the original BeppoSAX Wide Field Camera detection. Using IBIS/ISGRI, Swift/BAT and archival…

Astrophysics · Physics 2009-11-13 A. J. Bird , A. Bazzano , A. B. Hill , V. A. McBride , V. Sguera , S. E. Shaw , H. J. Watkins

Discovery of the X-ray transient SAX J1808.4-3658, a likely low mass X-ray binary

We report the discovery of a fairly bright transient during observations with the Wide Field Cameras on board the BeppoSAX satellite in September 1996. It was detected at a peak intensity of 0.1 Crab (2 to 10 keV) and lasted between 6 and…

Astrophysics · Physics 2008-11-26 J. J. M. in 't Zand , J. Heise , J. M. Muller , A. Bazzano , M. Cocchi , L. Natalucci , P. Ubertini

Dust-scattering halo and giant hard X-ray flare from the Supergiant Fast X-ray Transient IGR J16479-4514 investigated with XMM-Newton and INTEGRAL

We report results from the analysis of XMM-Newton and INTEGRAL data of IGR J16479-4514. The unpublished XMM-Newton observation, performed in 2012, occurred during the source eclipse. No point-like X-ray emission was detected from the…

High Energy Astrophysical Phenomena · Physics 2020-09-02 V. Sguera , A. Tiengo , L. Sidoli , A. J. Bird

The Swift view of Supergiant Fast X-ray Transients

We report here on the recent results of a monitoring campaign we have been carrying out with Swift/XRT on a sample of four Supergiant Fast X-ray Transients. The main goal of this large programme (with a net Swift/XRT exposure of 540 ks,…

High Energy Astrophysical Phenomena · Physics 2015-05-14 L. Sidoli , P. Romano , L. Ducci , A. Paizis , S. Vercellone , G. Cusumano , V. La Parola , V. Mangano , D. N. Burrows , J. A. Kennea , H. A. Krimm , N. Gehrels

Spectral properties of soft X-ray transient MAXI J0637$-$430 using AstroSat

Soft X-ray transients are systems that are detected when they go into an outburst, wherein their X-ray luminosity increases several orders of magnitude. These outbursts are markers of the poorly understood change in the spectral state of…

High Energy Astrophysical Phenomena · Physics 2022-02-21 Neal Titus Thomas , Shivappa B. Gudennavar , Ranjeev Misra , Bubbly S. G

An Optical Search for New Outbursting Low Mass X-Ray Binaries

Transient Low-Mass X-ray binaries (LMXBs) are discovered largely by X-ray and gamma-ray all-sky monitors. The X-ray outburst is also accompanied by an optical brightening, which empirically can precede detection of X-rays. Newly sensitive…

High Energy Astrophysical Phenomena · Physics 2023-12-01 Yuankun Wang , Eric C. Bellm , Allison Crossland , William I. Clarkson , Alessandro Mazzi , Reed Riddle , Russ R. Laher , Ben Rusholme

Faint Galactic X-ray Binaries

We present a short overview of the properties of faint Galactic X-ray binaries. We place emphasis on current classification scenarios. One of the important parameters for the faint sources is their intrinsic luminosity. In the case of…

Astrophysics · Physics 2011-04-11 P. G. Jonker , M. A. P. Torres , D. Steeghs