2003A&A...411L.405V

Query : 2003A&A...411L.405V

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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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3724 2
2 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2653 0
3 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4379 0
4 V* V1521 Cyg HXB 20 32 25.78 +40 57 27.9           WN4/5-6/7 1952 2
5 SAX J2103.5+4545 HXB 21 03 35.7100848936 +45 45 05.568751692   15.34 14.20 13.991 12.75 B0Ve 185 0

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