Time‐resolved X‐Ray Spectral Modeling of an Intermediate Burst from SGR 1900+14 Observed byHETE‐2FREGATE and WXM
| Autor: | J. F. Olive, George R. Ricker, K. Hurley, N. Kawai, J. L. Atteia, C. Barraud, G. Crew, T. Sakamoto, G. Pizzichini |
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| Rok vydání: | 2004 |
| Předmět: |
Physics
Astrophysics::High Energy Astrophysical Phenomena Astrophysics (astro-ph) X-ray FOS: Physical sciences Astronomy and Astrophysics Context (language use) Astrophysics X-Rays: Bursts Magnetar Spectral line Magnetic field Stars: Individual: Alphanumeric: SGR 1900+14 Space and Planetary Science Stars: Neutron Stars: Pulsars: General Black-body radiation Neutron Energy (signal processing) |
| Zdroj: | The Astrophysical Journal. 616:1148-1158 |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.1086/424957 |
| Popis: | We present a detailed analysis of a 3.5 s long burst from SGR1900+14 which occurred on 2001 July 2. The 2-150 keV time-integrated energy spectrum is well described by the sum of two blackbodies whose temperatures are approximately 4.3 and 9.8 keV. The time-resolved energy spectra are similarly well fit by the sum of two blackbodies. The higher temperature blackbody evolves with time in a manner consistent with a shrinking emitting surface. The interpretation of these results in the context of the magnetar model suggests that the two blackbody fit is an approximation of an absorbed, multi-temperature spectrum expected on theoretical grounds rather than a physical description of the emission. If this is indeed the case, our data provide further evidence for a strong magnetic field, and indicate that the entire neutron was radiating during most of the burst duration. Accepted for publication in the Astrophysical Journal |
| Databáze: | OpenAIRE |
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