IGR J18136-2739: A dwarf nova caught in outburst ?

R. Landi; V. Sguera; L. Bassani; A. Bazzano; F. Capitanio; S. Drave; A. J. Bird; L. Ferrario; D. T. Wickramasinghe; J. P. Osborne; N. Gehrels

IGR J18136-2739: A dwarf nova caught in outburst ?

R. Landi, V. Sguera, L. Bassani, A. Bazzano, F. Capitanio, S. Drave, A. J. Bird, L. Ferrario, D. T. Wickramasinghe, J. P. Osborne, N. Gehrels

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

Abstract

IGR J18136-2739 is a new transient INTEGRAL/IBIS source which has been caught in outburst during only a short period of time (26-29 August 2003). Motivated by this finding, we acquired observations with the X-ray telescope (XRT, 0.3-10 keV) on board Swift, in order to assess the nature of this source. At the border of the 90% IBIS error circle we detect for the first time in X-rays the dwarf nova V1830 Sgr and propose it as the likely counterpart to the IBIS source. The combined use of the spectral information afforded by XRT and IBIS indicates that the source spectrum is best fitted with either a simple power law with Γ ∼ 2.6 or a thermal bremsstrahlung with kT ∼ 17 keV; it also indicates the presence of variability in the source, as also highlighted by the occasional IBIS detection. V1830 Sgr is the second dwarf nova (DN) discovered by IBIS after SS Cyg.

Original language	English
Journal	Proceedings of Science
Publication status	Published - 2011
Event	INTEGRAL - A Science Workshop in Sardinia: The Extreme and Variable High Energy Sky, Extremesky 2011 - Cagliari, Italy Duration: 19 Sept 2011 → 23 Sept 2011

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@article{904198c812b24cacbaf01fd66415dccb,

title = "IGR J18136-2739: A dwarf nova caught in outburst ?",

abstract = "IGR J18136-2739 is a new transient INTEGRAL/IBIS source which has been caught in outburst during only a short period of time (26-29 August 2003). Motivated by this finding, we acquired observations with the X-ray telescope (XRT, 0.3-10 keV) on board Swift, in order to assess the nature of this source. At the border of the 90% IBIS error circle we detect for the first time in X-rays the dwarf nova V1830 Sgr and propose it as the likely counterpart to the IBIS source. The combined use of the spectral information afforded by XRT and IBIS indicates that the source spectrum is best fitted with either a simple power law with Γ ∼ 2.6 or a thermal bremsstrahlung with kT ∼ 17 keV; it also indicates the presence of variability in the source, as also highlighted by the occasional IBIS detection. V1830 Sgr is the second dwarf nova (DN) discovered by IBIS after SS Cyg.",

author = "R. Landi and V. Sguera and L. Bassani and A. Bazzano and F. Capitanio and S. Drave and Bird, {A. J.} and L. Ferrario and Wickramasinghe, {D. T.} and Osborne, {J. P.} and N. Gehrels",

year = "2011",

language = "English",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

note = "INTEGRAL - A Science Workshop in Sardinia: The Extreme and Variable High Energy Sky, Extremesky 2011 ; Conference date: 19-09-2011 Through 23-09-2011",

}

TY - JOUR

T1 - IGR J18136-2739

T2 - INTEGRAL - A Science Workshop in Sardinia: The Extreme and Variable High Energy Sky, Extremesky 2011

AU - Landi, R.

AU - Sguera, V.

AU - Bassani, L.

AU - Bazzano, A.

AU - Capitanio, F.

AU - Drave, S.

AU - Bird, A. J.

AU - Ferrario, L.

AU - Wickramasinghe, D. T.

AU - Osborne, J. P.

AU - Gehrels, N.

PY - 2011

Y1 - 2011

N2 - IGR J18136-2739 is a new transient INTEGRAL/IBIS source which has been caught in outburst during only a short period of time (26-29 August 2003). Motivated by this finding, we acquired observations with the X-ray telescope (XRT, 0.3-10 keV) on board Swift, in order to assess the nature of this source. At the border of the 90% IBIS error circle we detect for the first time in X-rays the dwarf nova V1830 Sgr and propose it as the likely counterpart to the IBIS source. The combined use of the spectral information afforded by XRT and IBIS indicates that the source spectrum is best fitted with either a simple power law with Γ ∼ 2.6 or a thermal bremsstrahlung with kT ∼ 17 keV; it also indicates the presence of variability in the source, as also highlighted by the occasional IBIS detection. V1830 Sgr is the second dwarf nova (DN) discovered by IBIS after SS Cyg.

AB - IGR J18136-2739 is a new transient INTEGRAL/IBIS source which has been caught in outburst during only a short period of time (26-29 August 2003). Motivated by this finding, we acquired observations with the X-ray telescope (XRT, 0.3-10 keV) on board Swift, in order to assess the nature of this source. At the border of the 90% IBIS error circle we detect for the first time in X-rays the dwarf nova V1830 Sgr and propose it as the likely counterpart to the IBIS source. The combined use of the spectral information afforded by XRT and IBIS indicates that the source spectrum is best fitted with either a simple power law with Γ ∼ 2.6 or a thermal bremsstrahlung with kT ∼ 17 keV; it also indicates the presence of variability in the source, as also highlighted by the occasional IBIS detection. V1830 Sgr is the second dwarf nova (DN) discovered by IBIS after SS Cyg.

UR - http://www.scopus.com/inward/record.url?scp=84890758201&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:84890758201

SN - 1824-8039

JO - Proceedings of Science

JF - Proceedings of Science

Y2 - 19 September 2011 through 23 September 2011

ER -

IGR J18136-2739: A dwarf nova caught in outburst ?

Abstract

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