Cygnus X-1: Shedding light on the spectral variability of a black hole

V. Grinberg; N. Hell; J. Wilms; J. Rodriguez; K. Pottschmidt; M. A. Nowak; M. Böck; A. Bodaghee; M. Cadolle Bel; F. Fürst; M. Hanke; M. Kühnel; P. Laurent; S. B. Markoff; A. Markowitz; D. M. Marcu; G. G. Pooley; A. Popp; R. E. Rothschild; J. A. Tomsick

Cygnus X-1: Shedding light on the spectral variability of a black hole

V. Grinberg
, N. Hell
, J. Wilms
, J. Rodriguez
, K. Pottschmidt
, M. A. Nowak
, M. Böck
, A. Bodaghee
, M. Cadolle Bel
, F. Fürst
, M. Hanke
, M. Kühnel
, P. Laurent
, S. B. Markoff
, A. Markowitz
, D. M. Marcu
, G. G. Pooley
, A. Popp
, R. E. Rothschild
, J. A. Tomsick

Department of Physics

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

Abstract

The knowledge of the spectral state of a black hole is essential for the interpretation of data from black holes in terms of their emission models. Based on pointed observations of Cyg X-1 with the Rossi X-ray timing Explorer (RXTE) that are used to classify simultaneous RXTE-ASM observations, we develop a scheme based on RXTE-ASM colors and count rates that can be used to classify all observations of this canonical black hole that were performed between 1996 and 2011. We show that a simple count rate criterion, as used previously, leads to a significantly higher fraction of misclassified observations. This scheme enables us to classify single INTEGRALIBIS science windows and to obtain summed spectra for the soft, intermediate and hard state with low contamination by other states.

Original language	English
Journal	Proceedings of Science
State	Published - 2012
Event	9th INTEGRAL Workshop and Celebration of the 10th Anniversary of the Launch, INTEGRAL 2012 - Bibliotheque Nationale de France, France Duration: Oct 15 2012 → Oct 19 2012

Cite this

Grinberg, V., Hell, N., Wilms, J., Rodriguez, J., Pottschmidt, K., Nowak, M. A., Böck, M., Bodaghee, A., Cadolle Bel, M., Fürst, F., Hanke, M., Kühnel, M., Laurent, P., Markoff, S. B., Markowitz, A., Marcu, D. M., Pooley, G. G., Popp, A., Rothschild, R. E., & Tomsick, J. A. (2012). Cygnus X-1: Shedding light on the spectral variability of a black hole. Proceedings of Science.

@article{5e85839d8939498baecff11970c793b7,

title = "Cygnus X-1: Shedding light on the spectral variability of a black hole",

abstract = "The knowledge of the spectral state of a black hole is essential for the interpretation of data from black holes in terms of their emission models. Based on pointed observations of Cyg X-1 with the Rossi X-ray timing Explorer (RXTE) that are used to classify simultaneous RXTE-ASM observations, we develop a scheme based on RXTE-ASM colors and count rates that can be used to classify all observations of this canonical black hole that were performed between 1996 and 2011. We show that a simple count rate criterion, as used previously, leads to a significantly higher fraction of misclassified observations. This scheme enables us to classify single INTEGRALIBIS science windows and to obtain summed spectra for the soft, intermediate and hard state with low contamination by other states.",

author = "V. Grinberg and N. Hell and J. Wilms and J. Rodriguez and K. Pottschmidt and Nowak, \{M. A.\} and M. B{\"o}ck and A. Bodaghee and \{Cadolle Bel\}, M. and F. F{\"u}rst and M. Hanke and M. K{\"u}hnel and P. Laurent and Markoff, \{S. B.\} and A. Markowitz and Marcu, \{D. M.\} and Pooley, \{G. G.\} and A. Popp and Rothschild, \{R. E.\} and Tomsick, \{J. A.\}",

year = "2012",

language = "English",

journal = "Proceedings of Science",

issn = "1824-8039",

note = "9th INTEGRAL Workshop and Celebration of the 10th Anniversary of the Launch, INTEGRAL 2012 ; Conference date: 15-10-2012 Through 19-10-2012",

}

TY - JOUR

T1 - Cygnus X-1

T2 - 9th INTEGRAL Workshop and Celebration of the 10th Anniversary of the Launch, INTEGRAL 2012

AU - Grinberg, V.

AU - Hell, N.

AU - Wilms, J.

AU - Rodriguez, J.

AU - Pottschmidt, K.

AU - Nowak, M. A.

AU - Böck, M.

AU - Bodaghee, A.

AU - Cadolle Bel, M.

AU - Fürst, F.

AU - Hanke, M.

AU - Kühnel, M.

AU - Laurent, P.

AU - Markoff, S. B.

AU - Markowitz, A.

AU - Marcu, D. M.

AU - Pooley, G. G.

AU - Popp, A.

AU - Rothschild, R. E.

AU - Tomsick, J. A.

PY - 2012

Y1 - 2012

N2 - The knowledge of the spectral state of a black hole is essential for the interpretation of data from black holes in terms of their emission models. Based on pointed observations of Cyg X-1 with the Rossi X-ray timing Explorer (RXTE) that are used to classify simultaneous RXTE-ASM observations, we develop a scheme based on RXTE-ASM colors and count rates that can be used to classify all observations of this canonical black hole that were performed between 1996 and 2011. We show that a simple count rate criterion, as used previously, leads to a significantly higher fraction of misclassified observations. This scheme enables us to classify single INTEGRALIBIS science windows and to obtain summed spectra for the soft, intermediate and hard state with low contamination by other states.

AB - The knowledge of the spectral state of a black hole is essential for the interpretation of data from black holes in terms of their emission models. Based on pointed observations of Cyg X-1 with the Rossi X-ray timing Explorer (RXTE) that are used to classify simultaneous RXTE-ASM observations, we develop a scheme based on RXTE-ASM colors and count rates that can be used to classify all observations of this canonical black hole that were performed between 1996 and 2011. We show that a simple count rate criterion, as used previously, leads to a significantly higher fraction of misclassified observations. This scheme enables us to classify single INTEGRALIBIS science windows and to obtain summed spectra for the soft, intermediate and hard state with low contamination by other states.

UR - https://www.scopus.com/pages/publications/84883875176

M3 - Conference article

AN - SCOPUS:84883875176

SN - 1824-8039

JO - Proceedings of Science

JF - Proceedings of Science

Y2 - 15 October 2012 through 19 October 2012

ER -

Cygnus X-1: Shedding light on the spectral variability of a black hole

Abstract

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