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26 April 2024 |
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Spectral states and transient behaviour of a sample of X-ray bursters observed by BeppoSax | L.Natalucci
; A.Bazzano
; F.Capitanio
; M.Cocchi
; P.Ubertini
; J.J.M. in ’t Zand
; | Date: |
3 Aug 2004 | Subject: | astro-ph | Abstract: | During observation campaigns of the Galactic Bulge region, BeppoSAX detected a total of 21 new X-ray bursters in about 6 years of operation. These sources are mostly transient and often feature a hard X-ray spectrum, extending up to ~ 200 keV. A hard spectrum is generally found in weak, relatively short outbursts. On the other hand two sources, SAX J1747.0-2853 and SAX J1750.8-2900, have been seen with soft X-ray transient behaviour. In both low/hard and high/soft state, a thermal component is observed at energies below ~10 keV and the spectra are compatible with the same model consisting of a blackbody or disk blackbody plus a hard or Comptonized component. Light curves are characterized by either weak, short flares or longer, high luminosity eruptions with exponential decay. | Source: | arXiv, astro-ph/0408046 | Services: | Forum | Review | PDF | Favorites |
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