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

^*Corresponding author for this work

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

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 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 - Sep 2001
Externally published	Yes
Event	4th Integral Workshop -Exploring the Gamma-Ray Universe-2000 - Alicante, Spain Duration: Sep 4 2000 → Sep 8 2000

Keywords

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

ASJC Scopus subject areas

Aerospace Engineering
Space and Planetary Science

Cite this

@article{aa17640776574154993ec05b5e9e63f0,

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,

language = "English",

pages = "491--494",

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

issn = "0379-6566",

publisher = "European Space Agency",

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

Y1 - 2001/9

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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UR - http://www.scopus.com/inward/citedby.url?scp=0035463765&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0035463765

SP - 491

EP - 494

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

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

SN - 0379-6566

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

ASJC Scopus subject areas

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