The 2013 outburst of a transient very faint X-ray binary, 23 arcsec from Sgr A

E. W. Koch; A. Bahramian; C. O. Heinke; K. Mori; N. Rea; N. Degenaar; D. Haggard; R. Wijnands; G. Ponti; J. M. Miller; F. Yusef-Zadeh; F. Dufour; W. D. Cotton; F. K. Baganoff; M. T. Reynolds

doi:10.1093/mnras/stu887

The 2013 outburst of a transient very faint X-ray binary, 23 arcsec from Sgr A

E. W. Koch^*, A. Bahramian, C. O. Heinke, K. Mori, N. Rea, N. Degenaar, D. Haggard, R. Wijnands, G. Ponti, J. M. Miller, F. Yusef-Zadeh, F. Dufour, W. D. Cotton, F. K. Baganoff, M. T. Reynolds

^*Corresponding author for this work

Physics and Astronomy

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

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Abstract

We report observations using the Swift/XRT, NuSTAR, and Chandra X-ray telescopes of the transient X-ray source CXOGC J174540.0-290005 during its 2013 outburst. Due to its location in the field of multiple observing campaigns targeting Sgr A*, this is one of the best-studied outbursts of a very faint X-ray binary (VFXB; peak L^X < 10³⁶ erg s^-1) yet recorded, with detections in 173 ks of X-ray observations over 50 d. VFXBs are of particular interest, due to their unusually low outburst luminosities and time-averaged mass transfer rates, which are hard to explain within standard accretion physics and binary evolution. The 2013 outburst of CXOGC J174540.0-290005 peaked at L^X(2-10 keV) = 5.0 × 10³⁵ erg s^-1, and all data above 10³⁴ erg s^-1 were well fitted by an absorbed power law of photon index ∼1.7, extending from 2 keV out to ≳70 keV. We discuss the implications of these observations for the accretion state of CXOGC J174540.0-290005.

Original language	English (US)
Pages (from-to)	372-381
Number of pages	10
Journal	Monthly Notices of the Royal Astronomical Society
Volume	442
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stu887
State	Published - Jun 2014

Keywords

Accretion, accretion discs
X-rays: binaries
X-rays: individual: CXOGCJ174540.0-290005

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stu887

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Koch, E. W., Bahramian, A., Heinke, C. O., Mori, K., Rea, N., Degenaar, N., Haggard, D., Wijnands, R., Ponti, G., Miller, J. M., Yusef-Zadeh, F., Dufour, F., Cotton, W. D., Baganoff, F. K., & Reynolds, M. T. (2014). The 2013 outburst of a transient very faint X-ray binary, 23 arcsec from Sgr A. Monthly Notices of the Royal Astronomical Society, 442(1), 372-381. https://doi.org/10.1093/mnras/stu887

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title = "The 2013 outburst of a transient very faint X-ray binary, 23 arcsec from Sgr A",

abstract = "We report observations using the Swift/XRT, NuSTAR, and Chandra X-ray telescopes of the transient X-ray source CXOGC J174540.0-290005 during its 2013 outburst. Due to its location in the field of multiple observing campaigns targeting Sgr A*, this is one of the best-studied outbursts of a very faint X-ray binary (VFXB; peak LX < 1036 erg s-1) yet recorded, with detections in 173 ks of X-ray observations over 50 d. VFXBs are of particular interest, due to their unusually low outburst luminosities and time-averaged mass transfer rates, which are hard to explain within standard accretion physics and binary evolution. The 2013 outburst of CXOGC J174540.0-290005 peaked at LX(2-10 keV) = 5.0 × 1035 erg s-1, and all data above 1034 erg s-1 were well fitted by an absorbed power law of photon index ∼1.7, extending from 2 keV out to ≳70 keV. We discuss the implications of these observations for the accretion state of CXOGC J174540.0-290005.",

keywords = "Accretion, accretion discs, X-rays: binaries, X-rays: individual: CXOGCJ174540.0-290005",

author = "Koch, {E. W.} and A. Bahramian and Heinke, {C. O.} and K. Mori and N. Rea and N. Degenaar and D. Haggard and R. Wijnands and G. Ponti and Miller, {J. M.} and F. Yusef-Zadeh and F. Dufour and Cotton, {W. D.} and Baganoff, {F. K.} and Reynolds, {M. T.}",

year = "2014",

month = jun,

doi = "10.1093/mnras/stu887",

language = "English (US)",

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pages = "372--381",

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Koch, EW, Bahramian, A, Heinke, CO, Mori, K, Rea, N, Degenaar, N, Haggard, D, Wijnands, R, Ponti, G, Miller, JM, Yusef-Zadeh, F, Dufour, F, Cotton, WD, Baganoff, FK & Reynolds, MT 2014, 'The 2013 outburst of a transient very faint X-ray binary, 23 arcsec from Sgr A', Monthly Notices of the Royal Astronomical Society, vol. 442, no. 1, pp. 372-381. https://doi.org/10.1093/mnras/stu887

TY - JOUR

T1 - The 2013 outburst of a transient very faint X-ray binary, 23 arcsec from Sgr A

AU - Koch, E. W.

AU - Bahramian, A.

AU - Heinke, C. O.

AU - Mori, K.

AU - Rea, N.

AU - Degenaar, N.

AU - Haggard, D.

AU - Wijnands, R.

AU - Ponti, G.

AU - Miller, J. M.

AU - Yusef-Zadeh, F.

AU - Dufour, F.

AU - Cotton, W. D.

AU - Baganoff, F. K.

AU - Reynolds, M. T.

PY - 2014/6

Y1 - 2014/6

N2 - We report observations using the Swift/XRT, NuSTAR, and Chandra X-ray telescopes of the transient X-ray source CXOGC J174540.0-290005 during its 2013 outburst. Due to its location in the field of multiple observing campaigns targeting Sgr A*, this is one of the best-studied outbursts of a very faint X-ray binary (VFXB; peak LX < 1036 erg s-1) yet recorded, with detections in 173 ks of X-ray observations over 50 d. VFXBs are of particular interest, due to their unusually low outburst luminosities and time-averaged mass transfer rates, which are hard to explain within standard accretion physics and binary evolution. The 2013 outburst of CXOGC J174540.0-290005 peaked at LX(2-10 keV) = 5.0 × 1035 erg s-1, and all data above 1034 erg s-1 were well fitted by an absorbed power law of photon index ∼1.7, extending from 2 keV out to ≳70 keV. We discuss the implications of these observations for the accretion state of CXOGC J174540.0-290005.

AB - We report observations using the Swift/XRT, NuSTAR, and Chandra X-ray telescopes of the transient X-ray source CXOGC J174540.0-290005 during its 2013 outburst. Due to its location in the field of multiple observing campaigns targeting Sgr A*, this is one of the best-studied outbursts of a very faint X-ray binary (VFXB; peak LX < 1036 erg s-1) yet recorded, with detections in 173 ks of X-ray observations over 50 d. VFXBs are of particular interest, due to their unusually low outburst luminosities and time-averaged mass transfer rates, which are hard to explain within standard accretion physics and binary evolution. The 2013 outburst of CXOGC J174540.0-290005 peaked at LX(2-10 keV) = 5.0 × 1035 erg s-1, and all data above 1034 erg s-1 were well fitted by an absorbed power law of photon index ∼1.7, extending from 2 keV out to ≳70 keV. We discuss the implications of these observations for the accretion state of CXOGC J174540.0-290005.

KW - Accretion, accretion discs

KW - X-rays: binaries

KW - X-rays: individual: CXOGCJ174540.0-290005

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The 2013 outburst of a transient very faint X-ray binary, 23 arcsec from Sgr A

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Keywords

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