2005/05/24 by S. Mereghetti, Sandro Mereghetti, Mereghetti, Sandro
Biochemistry, Genetics and Molecular Biology · Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #Geomagnetism and Paleomagnetism Studies #Geophysics and Gravity Measurements #Pulsars and Gravitational Waves Research #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0505491
To appear in the proceedings of the 40th Rencontres de Moriond "Very High Energy Phenomena in the Universe" - La Thuile, Italy (March 12-19, 2005) - 6 pages, 3 figures, 1 table
arxiv created 2005/05/24 · openalex publication_date 2005/05/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the last few years it has been recognized that two apparently distinct classes of peculiar high-energy sources are actually related and can be explained as young neutron stars with magnetic fields as high as 10e14 - 10e15 Gauss. One of these ''magnetars'', SGR 1806-20, has recently emitted the most powerful giant flare ever recorded. The high-energy observations of SGR 1806-20 carried out with XMM-Newton and INTEGRAL in the past two years showed a long term trend of increasing activity preceding the 2004 December 27 event. INTEGRAL data of this giant flare provided unique evidence for hard X-ray emission lasting about one hour after the burst onset, possibly due to the interaction of mildly relativistic ejecta with the circumstellar medium.