A transient black hole low-mass X-ray binary candidate in centaurus a

G. R. Sivakoff; R. P. Kraft; A. Jordan; A. M. Juett; D. A. Evans; W. R. Forman; M. J. Hardcastle; C. L. Sarazin; M. Birkinshaw; N. J. Brassington; J. H. Croston; W. E. Harris; C. Jones; S. S. Murray; S. Raychaudhury; K. A. Woodley; D. M. Worrall

doi:10.1086/587960

A transient black hole low-mass X-ray binary candidate in centaurus a

G. R. Sivakoff, R. P. Kraft, A. Jordan, A. M. Juett, D. A. Evans, W. R. Forman, M. J. Hardcastle, C. L. Sarazin, M. Birkinshaw, N. J. Brassington, J. H. Croston, W. E. Harris, C. Jones, S. S. Murray, S. Raychaudhury, K. A. Woodley, D. M. Worrall

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Resumen

We report the discovery of a bright transient X-ray source, CXOU J132518.2-430304, toward Centaurus A (Cen A) using six new Chandra X-Ray Observatory observations in 2007 March-May. Between 2003 and 2007, its flux has increased by a factor of >770. The source is likely a low-mass X-ray binary in Cen A with unabsorbed 0.3-10 keV band luminosities of (2-3) × 10 ³⁹ergs s^-1 and a transition from the steep-power-law state to the thermal state during our observations. CXOU J132518.2-430304 is the most luminous X-ray source in an early-type galaxy with extensive timing information that reveals transience and a spectral state transition. Combined with its luminosity, these properties make this source one of the strongest candidates to date for containing a stellar-mass black hole in an early-type galaxy. Unless this outburst lasts many years, the rate of luminous transients in Cen A is anomalously high compared to other early-type galaxies.

Idioma original	Inglés
Páginas (desde-hasta)	L27-L30
Publicación	Astrophysical Journal
Volumen	677
N.º	1 PART 2
DOI	https://doi.org/10.1086/587960
Estado	Publicada - 2008
Publicado de forma externa	Sí

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Sivakoff, G. R., Kraft, R. P., Jordan, A., Juett, A. M., Evans, D. A., Forman, W. R., Hardcastle, M. J., Sarazin, C. L., Birkinshaw, M., Brassington, N. J., Croston, J. H., Harris, W. E., Jones, C., Murray, S. S., Raychaudhury, S., Woodley, K. A., & Worrall, D. M. (2008). A transient black hole low-mass X-ray binary candidate in centaurus a. Astrophysical Journal, 677(1 PART 2), L27-L30. https://doi.org/10.1086/587960

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title = "A transient black hole low-mass X-ray binary candidate in centaurus a",

abstract = "We report the discovery of a bright transient X-ray source, CXOU J132518.2-430304, toward Centaurus A (Cen A) using six new Chandra X-Ray Observatory observations in 2007 March-May. Between 2003 and 2007, its flux has increased by a factor of >770. The source is likely a low-mass X-ray binary in Cen A with unabsorbed 0.3-10 keV band luminosities of (2-3) × 10 39ergs s-1 and a transition from the steep-power-law state to the thermal state during our observations. CXOU J132518.2-430304 is the most luminous X-ray source in an early-type galaxy with extensive timing information that reveals transience and a spectral state transition. Combined with its luminosity, these properties make this source one of the strongest candidates to date for containing a stellar-mass black hole in an early-type galaxy. Unless this outburst lasts many years, the rate of luminous transients in Cen A is anomalously high compared to other early-type galaxies.",

keywords = "Binaries: close, CD, Galaxies: elliptical and lenticular, Galaxies: individual (Centaurus A, NGC 5128), X-rays: binaries",

author = "Sivakoff, {G. R.} and Kraft, {R. P.} and A. Jordan and Juett, {A. M.} and Evans, {D. A.} and Forman, {W. R.} and Hardcastle, {M. J.} and Sarazin, {C. L.} and M. Birkinshaw and Brassington, {N. J.} and Croston, {J. H.} and Harris, {W. E.} and C. Jones and Murray, {S. S.} and S. Raychaudhury and Woodley, {K. A.} and Worrall, {D. M.}",

year = "2008",

doi = "10.1086/587960",

language = "English",

volume = "677",

pages = "L27--L30",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1 PART 2",

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Sivakoff, GR, Kraft, RP, Jordan, A, Juett, AM, Evans, DA, Forman, WR, Hardcastle, MJ, Sarazin, CL, Birkinshaw, M, Brassington, NJ, Croston, JH, Harris, WE, Jones, C, Murray, SS, Raychaudhury, S, Woodley, KA & Worrall, DM 2008, 'A transient black hole low-mass X-ray binary candidate in centaurus a', Astrophysical Journal, vol. 677, n.º 1 PART 2, pp. L27-L30. https://doi.org/10.1086/587960

TY - JOUR

T1 - A transient black hole low-mass X-ray binary candidate in centaurus a

AU - Sivakoff, G. R.

AU - Kraft, R. P.

AU - Jordan, A.

AU - Juett, A. M.

AU - Evans, D. A.

AU - Forman, W. R.

AU - Hardcastle, M. J.

AU - Sarazin, C. L.

AU - Birkinshaw, M.

AU - Brassington, N. J.

AU - Croston, J. H.

AU - Harris, W. E.

AU - Jones, C.

AU - Murray, S. S.

AU - Raychaudhury, S.

AU - Woodley, K. A.

AU - Worrall, D. M.

PY - 2008

Y1 - 2008

N2 - We report the discovery of a bright transient X-ray source, CXOU J132518.2-430304, toward Centaurus A (Cen A) using six new Chandra X-Ray Observatory observations in 2007 March-May. Between 2003 and 2007, its flux has increased by a factor of >770. The source is likely a low-mass X-ray binary in Cen A with unabsorbed 0.3-10 keV band luminosities of (2-3) × 10 39ergs s-1 and a transition from the steep-power-law state to the thermal state during our observations. CXOU J132518.2-430304 is the most luminous X-ray source in an early-type galaxy with extensive timing information that reveals transience and a spectral state transition. Combined with its luminosity, these properties make this source one of the strongest candidates to date for containing a stellar-mass black hole in an early-type galaxy. Unless this outburst lasts many years, the rate of luminous transients in Cen A is anomalously high compared to other early-type galaxies.

AB - We report the discovery of a bright transient X-ray source, CXOU J132518.2-430304, toward Centaurus A (Cen A) using six new Chandra X-Ray Observatory observations in 2007 March-May. Between 2003 and 2007, its flux has increased by a factor of >770. The source is likely a low-mass X-ray binary in Cen A with unabsorbed 0.3-10 keV band luminosities of (2-3) × 10 39ergs s-1 and a transition from the steep-power-law state to the thermal state during our observations. CXOU J132518.2-430304 is the most luminous X-ray source in an early-type galaxy with extensive timing information that reveals transience and a spectral state transition. Combined with its luminosity, these properties make this source one of the strongest candidates to date for containing a stellar-mass black hole in an early-type galaxy. Unless this outburst lasts many years, the rate of luminous transients in Cen A is anomalously high compared to other early-type galaxies.

KW - Binaries: close

KW - CD

KW - Galaxies: elliptical and lenticular

KW - Galaxies: individual (Centaurus A

KW - NGC 5128)

KW - X-rays: binaries

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U2 - 10.1086/587960

DO - 10.1086/587960

M3 - Article

AN - SCOPUS:62549138466

SN - 0004-637X

VL - 677

SP - L27-L30

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 2

ER -

A transient black hole low-mass X-ray binary candidate in centaurus a

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