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

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

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.

Original language	English
Pages (from-to)	L27-L30
Journal	Astrophysical Journal
Volume	677
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/587960
State	Published - 2008
Externally published	Yes

Keywords

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

Access to Document

10.1086/587960

Cite this

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

@article{cd40a7947c374fa8830b25d9246a32b6,

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",

}

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, no. 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

UR - http://www.scopus.com/inward/record.url?scp=62549138466&partnerID=8YFLogxK

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

Abstract

Keywords

Access to Document

Fingerprint

Cite this