Two years of INTEGRAL monitoring of the soft gamma-ray repeater SGR 1806-20: from quiescence to frenzy
D. Gotz,Sandro Mereghetti,S. Molkov,Kevin Hurley,I. F. Mirabel,Rashid Sunyaev,G. Weidenspointner,Søren Brandt,M. Del Santo,Marco Feroci,Ersin Gogus,A. von Kienlin,M. van der Klis,Chryssa Kouveliotou,Niels Lund,G. Pizzichini,Pietro Ubertini,C. Winkler,Paul M. Woods +18 more
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In this article, the authors report on the properties of short bursts detected with the IntEGRAL satellite before the giant flare and derive their number-intensity distribution and confirm the hardness-intensity correlation for the bursts.Abstract:
SGR 180620 has been observed for more than 2 years with the INTEGRAL satellite. In this period the source went from a quiescent state into a very active one culminating in a giant flare on December 27, 2004. Here we report on the properties of all the short bursts detected with INTEGRAL before the giant flare. We derive their number-intensity distribution and confirm the hardness-intensity correlation for the bursts found by Gotz et al. (2004a, A&A, 417, L45). Our sample includes a very bright outburst that occurred on October 5, 2004, during which over one hundred bursts were emitted in 10 minutes, involving an energy release of 3 × 1042 erg.We present a detailed analysis of it and discuss our results in the framework of the magnetar model.read more
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Journal ArticleDOI
The strongest cosmic magnets: soft gamma-ray repeaters and anomalous X-ray pulsars
Abstract: Two classes of X-ray pulsars, the anomalous X-ray pulsars and the soft gamma-ray repeaters, have been recognized in the last decade as the most promising candidates for being magnetars: isolated neutron stars powered by magnetic energy. I review the observational properties of these objects, focussing on the most recent results, and their interpretation in the magnetar model. Alternative explanations, in particular those based on accretion from residual disks, are also considered. The possible relations between these sources and other classes of neutron stars and astrophysical objects are also discussed.
The INTEGRAL Mission
TL;DR: The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) as mentioned in this paper is dedicated to the fine spectroscopy (2.5 − 1.5 ) and fine imaging (angular resolution: 12 arcmin FWHM) of celestial gamma-ray sources in the energy range 15 − 10 − MeV with concurrent source monitoring in the X-ray ($3 − 35 ) and optical (V -band, 550 −nm) energy ranges.
Journal ArticleDOI
The prelude to and aftermath of the giant flare of 2004 December 27: persistent and pulsed X-Ray properties of SGR 1806-20 from 1993 to 2005
Peter M. Woods,Chryssa Kouveliotou,Mark H. Finger,Ersin Gogus,Colleen A. Wilson,Sandeep K. Patel,Sandeep K. Patel,Kevin Hurley,Jean H. Swank +8 more
TL;DR: In this article, the evolution of key spectral and temporal parameters of SGR 1806-20 prior to and following the highly energetic giant flare of 2004 December 27 was studied using Chandra and other publicly available X-ray detector observations.
Journal ArticleDOI
Strong bursts from the anomalous X-ray pulsar 1E 1547.0-5408 observed with the INTEGRAL/SPI Anti-Coincidence Shield
Sandro Mereghetti,Diego Götz,Georg Weidenspointner,A. von Kienlin,Paolo Esposito,Paolo Esposito,Andrea Tiengo,Giacomo Vianello,G. L. Israel,Luigi Stella,Roberto Turolla,Roberto Turolla,Nanda Rea,Silvia Zane +13 more
TL;DR: In 2009 January, multiple short bursts of soft gamma rays were detected from the direction of the anomalous X-ray pulsar 1E 1547.0-5408 by different satellites as discussed by the authors.
Journal ArticleDOI
Terrestrial Consequences of Spectral and Temporal Variability in Ionizing Photon Events
TL;DR: The effect of many astrophysical events causing atmospheric ionization can be approximated without including time development by generalizing atmospheric computations to include a broad range of peak photon energies and investigating the effect of burst duration.
References
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Book
Compact Stellar X-ray Sources
TL;DR: A decade of X-ray sources and their evolution is described in this paper, with a focus on the formation and evolution of super-soft sources and the formation of compact stellar sources.
Journal ArticleDOI
Formation of very strongly magnetized neutron stars - Implications for gamma-ray bursts
TL;DR: In this article, it is argued that a convective dynamo can also generate a very strong dipole field after the merger of a neutron star binary, but only if the merged star survives for as long as about 10-100 ms.
Journal ArticleDOI
The soft gamma repeaters as very strongly magnetized neutron stars - I. Radiative mechanism for outbursts
Journal ArticleDOI
The INTEGRAL mission
Christoph Winkler,Thierry J.-L. Courvoisier,G. Di Cocco,Neil Gehrels,A. Giménez,A. Giménez,S. A. Grebenev,W. Hermsen,J. M. Mas-Hesse,J. M. Mas-Hesse,Francois Lebrun,Niels Lund,Giorgio G. C. Palumbo,J. A. Paul,J. P. Roques,Herbert W. Schnopper,V. Schönfelder,R. A. Sunyaev,Bonnard J. Teegarden,P. Ubertini,G. Vedrenne,A. J. Dean +21 more
TL;DR: The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) as mentioned in this paper is dedicated to the fine spectroscopy (2.5 × 1.5 ) and fine imaging (angular resolution: 12 arcmin FWHM) of celestial gamma-ray sources in the energy range 15 −keV to 10 −MeV with concurrent source monitoring in the X −ray and optical (V −band, 550 −nm) energy ranges.
Journal ArticleDOI
IBIS: The Imager on-board INTEGRAL
P. Ubertini,Francois Lebrun,G. Di Cocco,Angela Bazzano,A. J. Bird,K. Broenstad,Andrea Goldwurm,G. La Rosa,Claudio Labanti,Philippe Laurent,I. F. Mirabel,E. M. Quadrini,Brian D. Ramsey,Victor Reglero,L. Sabau,Bruno Sacco,Ruediger Staubert,L. Vigroux,Martin C. Weisskopf,A. A. Zdziarski +19 more
TL;DR: The IBIS telescope as mentioned in this paper is the high angular resolution gamma-ray imager on-board the INTEGRAL Observatory, which was successfully launched from Baikonur (Kazakhstan) the 17th of October 2002.
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Formation of very strongly magnetized neutron stars - Implications for gamma-ray bursts
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An exceptionally bright flare from SGR 1806–20 and the origins of short-duration γ-ray bursts
Kevin Hurley,Steven E. Boggs,Steven E. Boggs,David M. Smith,Robert C. Duncan,Robert P. Lin,Andreas Zoglauer,Säm Krucker,G. J. Hurford,Hugh S. Hudson,C. Wigger,Wojtek Hajdas,Christopher Thompson,I. G. Mitrofanov,A. B. Sanin,William V. Boynton,C. Fellows,A. von Kienlin,G. G. Lichti,Arne Rau,T. L. Cline +20 more