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

Chaty, S.; Haswell, C.A.; Hynes, R.I.; Shrader, C.R.; Cui, W.; Mauche, C.W.; Norton, A.J.; Solheim, J-E.; Østensen, R.; Geballe, T.R.; Ioannou, Z. and King, A.R. (2001). Multiwavelength observations revealing the outbursts of the two soft X-ray transients XTE J1859+226 and XTE J1118+480. In: Fourth INTEGRAL Workshop, 4-8 September 2000, Alicante, Spain, ESA Publications Division, pp. 491–494.

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Abstract

We 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 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 sytems.

Item Type: Conference Item
Copyright Holders: 2001 European Space Agency
ISBN: 92-9092-677-5, 978-92-9092-677-1
Extra Information: ISBN: 9290926775
Keywords: X-rays; stars, infrared; stars
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 4782
Depositing User: Users 6827 not found.
Date Deposited: 11 Jul 2006
Last Modified: 09 May 2011 09:31
URI: http://oro.open.ac.uk/id/eprint/4782
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