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

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

The Open University

Research output: Contribution to journal › Conference article › peer-review

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 language	English
Pages (from-to)	491-494
Number of pages	4
Journal	European Space Agency, (Special Publication) ESA SP
Issue number	459
Publication status	Published - 1 Sept 2001
Externally published	Yes
Event	4th Integral Workshop -Exploring the Gamma-Ray Universe-2000 - Alicante, Spain Duration: 4 Sept 2000 → 8 Sept 2000

Keywords

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

Cite this

@article{309c0f8e344345c1befbd56378abef96,

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

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.",

keywords = "Infrared: stars, Stars: individual: XTE J1859+226, X-rays: stars, XTE J1118+480",

author = "S. Chaty and Haswell, \{C. A.\} and Hynes, \{R. I.\} and Shrader, \{C. R.\} and W. Cui and Mauche, \{C. W.\} and Norton, \{A. J.\} and Solheim, \{J. E.\} and R. Ostensen and Geballe, \{T. R.\} and Z. Ioannou and King, \{A. R.\}",

year = "2001",

month = sep,

day = "1",

language = "English",

pages = "491--494",

journal = "European Space Agency, (Special Publication) ESA SP",

issn = "0379-6566",

number = "459",

note = "4th Integral Workshop -Exploring the Gamma-Ray Universe-2000 ; Conference date: 04-09-2000 Through 08-09-2000",

}

TY - JOUR

T1 - Multiwavelength observations revealing the outbursts of the two soft X-ray transients XTE J1859+226 and XTE J1118+480

AU - Chaty, S.

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.

PY - 2001/9/1

Y1 - 2001/9/1

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

M3 - Conference article

AN - SCOPUS:0035463765

SN - 0379-6566

SP - 491

EP - 494

JO - European Space Agency, (Special Publication) ESA SP

JF - European Space Agency, (Special Publication) ESA SP

IS - 459

T2 - 4th Integral Workshop -Exploring the Gamma-Ray Universe-2000

Y2 - 4 September 2000 through 8 September 2000

ER -

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

Abstract

Keywords

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