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

S. Chaty, C. A. Haswell, R. I. Hynes, C. R. Shrader, W. Cui, C. W. Mauche, A. J. Norton, J. E. Solheim, R. Ostensen, T. R. Geballe, Z. Ioannou, A. R. King

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

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 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.

Original languageEnglish
Title of host publicationEuropean Space Agency, (Special Publication) ESA SP
Pages491-494
Number of pages4
Edition459
Publication statusPublished - Sep 2001
Event4th Integral Workshop -Exploring the Gamma-Ray Universe-2000 - Alicante, Spain
Duration: Sep 4 2000Sep 8 2000

Other

Other4th Integral Workshop -Exploring the Gamma-Ray Universe-2000
CountrySpain
CityAlicante
Period9/4/009/8/00

Fingerprint

X rays
Synchrotrons
Infrared radiation
Testing

Keywords

  • Infrared: stars
  • Stars: individual: XTE J1859+226
  • X-rays: stars
  • XTE J1118+480

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Chaty, S., Haswell, C. A., Hynes, R. I., Shrader, C. R., Cui, W., Mauche, C. W., ... King, A. R. (2001). Multiwavelength observations revealing the outbursts of the two soft X-ray transients XTE J1859+226 and XTE J1118+480. In European Space Agency, (Special Publication) ESA SP (459 ed., pp. 491-494)

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.; Ostensen, R.; Geballe, T. R.; Ioannou, Z.; King, A. R.

European Space Agency, (Special Publication) ESA SP. 459. ed. 2001. p. 491-494.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chaty, S, Haswell, CA, Hynes, RI, Shrader, CR, Cui, W, Mauche, CW, Norton, AJ, Solheim, JE, Ostensen, R, Geballe, TR, Ioannou, Z & King, AR 2001, Multiwavelength observations revealing the outbursts of the two soft X-ray transients XTE J1859+226 and XTE J1118+480. in European Space Agency, (Special Publication) ESA SP. 459 edn, pp. 491-494, 4th Integral Workshop -Exploring the Gamma-Ray Universe-2000, Alicante, Spain, 9/4/00.
Chaty S, Haswell CA, Hynes RI, Shrader CR, Cui W, Mauche CW et al. Multiwavelength observations revealing the outbursts of the two soft X-ray transients XTE J1859+226 and XTE J1118+480. In European Space Agency, (Special Publication) ESA SP. 459 ed. 2001. p. 491-494
Chaty, S. ; Haswell, C. A. ; Hynes, R. I. ; Shrader, C. R. ; Cui, W. ; Mauche, C. W. ; Norton, A. J. ; Solheim, J. E. ; Ostensen, R. ; Geballe, T. R. ; Ioannou, Z. ; King, A. R. / Multiwavelength observations revealing the outbursts of the two soft X-ray transients XTE J1859+226 and XTE J1118+480. European Space Agency, (Special Publication) ESA SP. 459. ed. 2001. pp. 491-494
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AU - Haswell, C. A.

AU - Hynes, R. I.

AU - Shrader, C. R.

AU - Cui, W.

AU - Mauche, C. W.

AU - Norton, A. J.

AU - Solheim, J. E.

AU - Ostensen, R.

AU - Geballe, T. R.

AU - Ioannou, Z.

AU - King, A. R.

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N2 - 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 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.

AB - 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 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.

KW - Infrared: stars

KW - Stars: individual: XTE J1859+226

KW - X-rays: stars

KW - XTE J1118+480

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