Multiwavelength observations revealing the outbursts of the two soft X-ray transients XTE J1859+226 and XTE J1118+480

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dc.creatorChaty, S.
dc.creatorHaswell, C. A.
dc.creatorHynes, R. I.
dc.creatorShrader, C. R.
dc.creatorCui, W.
dc.creatorMauche, C. W.
dc.creatorNorton, A. J.
dc.creatorSolheim, J. -E.
dc.creatorOstensen, R.
dc.creatorGeballe, T. R.
dc.creatorIoannou, Z.
dc.creatorKing, A. R.
dc.date2001-02-06
dc.date.accessioned2026-07-07T01:57:38Z
dc.date.available2026-07-07T01:57:38Z
dc.descriptionWe report here on multiwavelength observations of the two new soft X-ray transients (SXTs) XTE J1859+226 and XTE J1118+480, which we observed with HST/RXTE/UKIRT. For XTE J1118+480 we also used EUVE since it is located at a very high galactic latitude and suffers from very low extinction. The two sources exhibited very different behaviour. XTE J1859+226 seems quite normal and therefore a good object for testing the accretion mechanisms in place during the outbursts, XTE J1118+480 is much more unusual because it exhibits i) a low X-ray to optical ratio and ii) a strong non-thermal contribution in the radio to optical domain, which is likely to be due to synchrotron emission. We concentrate here on the near-infrared (NIR) and optical observations of these two systems.
dc.description4 pages, 6 figures, conference, Proceedings of the 4th INTEGRAL Workshop (Alicante 2000), to be published in ESA-SP (2001)
dc.identifierhttps://arxiv.org/abs/astro-ph/0102103
dc.identifierhttp://arxiv.org/abs/astro-ph/0102103
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/2462
dc.subjectAstrophysics
dc.titleMultiwavelength observations revealing the outbursts of the two soft X-ray transients XTE J1859+226 and XTE J1118+480
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