SIMBAD references

2003A&A...411L.405V - Astronomy and Astrophysics, volume 411, L405-410 (2003/11-3)

First INTEGRAL observations of Cygnus X-3.

VILHU O., HJALMARSDOTTER L., ZDZIARSKI A.A., PAIZIS A., McCOLLOUGH M.L., BECKMANN V., COURVOISIER T.J.-L., EBISAWA K., GOLDONI P., HAKALA P., HANNIKAINEN D., KRETSCHMAR P. and WESTERGAARD N.J.

Abstract (from CDS):

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/γ-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.

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Journal keyword(s): gamma rays: observations - radiation mechanisms: non-thermal - stars: individual: Cyg X-3 - X-rays: binaries - X-rays: general - X-rays: stars

Simbad objects: 5

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