First INTEGRAL observations of Cygnus X-3

O. Vilhu; L. Hjalmarsdotter; A.A. Zdziarski; A. Paizis; M.L. McCollough; V. Beckmann; T.J.L. Courvoisier; K. Ebisawa; P. Goldoni; P. Hakala; D. Hannikainen; P. Kretschmar; Niels Jørgen Stenfeldt Westergaard

First INTEGRAL observations of Cygnus X-3

O. Vilhu
, L. Hjalmarsdotter
, A.A. Zdziarski
, A. Paizis
, M.L. McCollough
, V. Beckmann
, T.J.L. Courvoisier
, K. Ebisawa
, P. Goldoni
, P. Hakala
, D. Hannikainen
, P. Kretschmar
, Niels Jørgen Stenfeldt Westergaard

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

Abstract

We present the first INTEGRAL results on Cyg X-3 from the PV phase observations of the Cygnus region. The source was clearly detected by the JEM-X, ISGRI and SPI. The INTEGRAL observations were supported by simultaneous pointed RXTE observations. Their lightcurves folded over the 4.8 hour binary period are compatible with the mean RXTE/ASM and CGRO/BATSE light curves. We fit our broad-band X-ray/gamma-ray spectra with a physical model, which represents the first such published model for Cyg X-3. The main physical processes in the source are thermal Comptonization and Compton reflection with parameters similar to those found for black-hole binaries at high Eddington rates.

Original language	English
Journal	Astronomy and Astrophysics
Volume	411
Issue number	1
Pages (from-to)	L405-L410
ISSN	0004-6361
Publication status	Published - 2003

Keywords

stars : individual : Cyg X-3
gamma rays : observations
X-rays : stars
X-rays : general
X-rays : binaries
radiation mechanisms : non-thermal

OpenUrl availability

Check availability in DTU Findit

Cite this

@article{458dd09a52d14635bfbf24534284da0c,

title = "First INTEGRAL observations of Cygnus X-3",

abstract = "We present the first INTEGRAL results on Cyg X-3 from the PV phase observations of the Cygnus region. The source was clearly detected by the JEM-X, ISGRI and SPI. The INTEGRAL observations were supported by simultaneous pointed RXTE observations. Their lightcurves folded over the 4.8 hour binary period are compatible with the mean RXTE/ASM and CGRO/BATSE light curves. We fit our broad-band X-ray/gamma-ray spectra with a physical model, which represents the first such published model for Cyg X-3. The main physical processes in the source are thermal Comptonization and Compton reflection with parameters similar to those found for black-hole binaries at high Eddington rates.",

keywords = "stars : individual : Cyg X-3, gamma rays : observations, X-rays : stars, X-rays : general, X-rays : binaries, radiation mechanisms : non-thermal",

author = "O. Vilhu and L. Hjalmarsdotter and A.A. Zdziarski and A. Paizis and M.L. McCollough and V. Beckmann and T.J.L. Courvoisier and K. Ebisawa and P. Goldoni and P. Hakala and D. Hannikainen and P. Kretschmar and Westergaard, \{Niels J{\o}rgen Stenfeldt\}",

year = "2003",

language = "English",

volume = "411",

pages = "L405--L410",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "1",

}

TY - JOUR

T1 - First INTEGRAL observations of Cygnus X-3

AU - Vilhu, O.

AU - Hjalmarsdotter, L.

AU - Zdziarski, A.A.

AU - Paizis, A.

AU - McCollough, M.L.

AU - Beckmann, V.

AU - Courvoisier, T.J.L.

AU - Ebisawa, K.

AU - Goldoni, P.

AU - Hakala, P.

AU - Hannikainen, D.

AU - Kretschmar, P.

AU - Westergaard, Niels Jørgen Stenfeldt

PY - 2003

Y1 - 2003

N2 - We present the first INTEGRAL results on Cyg X-3 from the PV phase observations of the Cygnus region. The source was clearly detected by the JEM-X, ISGRI and SPI. The INTEGRAL observations were supported by simultaneous pointed RXTE observations. Their lightcurves folded over the 4.8 hour binary period are compatible with the mean RXTE/ASM and CGRO/BATSE light curves. We fit our broad-band X-ray/gamma-ray spectra with a physical model, which represents the first such published model for Cyg X-3. The main physical processes in the source are thermal Comptonization and Compton reflection with parameters similar to those found for black-hole binaries at high Eddington rates.

AB - We present the first INTEGRAL results on Cyg X-3 from the PV phase observations of the Cygnus region. The source was clearly detected by the JEM-X, ISGRI and SPI. The INTEGRAL observations were supported by simultaneous pointed RXTE observations. Their lightcurves folded over the 4.8 hour binary period are compatible with the mean RXTE/ASM and CGRO/BATSE light curves. We fit our broad-band X-ray/gamma-ray spectra with a physical model, which represents the first such published model for Cyg X-3. The main physical processes in the source are thermal Comptonization and Compton reflection with parameters similar to those found for black-hole binaries at high Eddington rates.

KW - stars : individual : Cyg X-3

KW - gamma rays : observations

KW - X-rays : stars

KW - X-rays : general

KW - X-rays : binaries

KW - radiation mechanisms : non-thermal

M3 - Journal article

SN - 0004-6361

VL - 411

SP - L405-L410

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 1

ER -

First INTEGRAL observations of Cygnus X-3

Abstract

Keywords

OpenUrl availability

Fingerprint

Cite this