Simultaneous BeppoSAX and RXTE observations of the X-ray burst sources GX 3+1 and Ser X-1
| Autor: | Matteo Guainazzi, E. C. Ford, T. Oosterbroek, Didier Barret |
|---|---|
| Přispěvatelé: | API (FNWI) |
| Jazyk: | angličtina |
| Rok vydání: | 2000 |
| Předmět: |
Physics
Astrophysics::High Energy Astrophysical Phenomena Astrophysics (astro-ph) X-ray Timing data FOS: Physical sciences Astronomy and Astrophysics Plasma Astrophysics Spectral line Space and Planetary Science Globular cluster Electron temperature Absorption (electromagnetic radiation) Line (formation) |
| Zdroj: | Astronomy & Astrophysics, 366(1), 138-145. EDP Sciences |
| ISSN: | 0004-6361 |
| Popis: | We have obtained spectral and timing data on GX 3+1 and Ser X-1. Both sources were observed simultaneously with BeppoSAX and RXTE. The RXTE data is used to provide power spectra and colour-colour diagrams in order to constrain the state (and thus track $\dot M$) the sources are in. The BeppoSAX data provide the broad-band spectra. The spectra of both sources are reasonably well-fit using a model consisting of a disk-blackbody, a comptonized component and a Fe line, absorbed by interstellar absorption. The electron temperature (kT$_{\rm e}$) of the Comptonizing plasma is in both cases $\sim$2.5 keV. This implies that no strong high-energy tail from the Comptonized component is present in either of the sources. We discuss the similarities between these burst sources and the luminous X-ray sources located in globular clusters. We find that the spectral parameters of the comptonized component provide information about the mass-accretion rate, which agrees well with estimates from the timing and spectral variations. 8 pages, accepted by A&A |
| Databáze: | OpenAIRE |
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