2003A&A...411L.377B

Query : 2003A&A...411L.377B

2003A&A...411L.377B - Astronomy and Astrophysics, volume 411L377-382 (2003/11-3)

SPI/INTEGRAL observation of the Cygnus region.

BOUCHET L., JOURDAIN E., ROQUES J.P., MANDROU P., VON BALLMOOS P., BOGGS S., CARAVEO P., CASSE M., CORDIER B., DIEHL R., DUROUCHOUX P., VON KIENLIN A., KNODLSEDER J., JEAN P., LELEUX P., LICHTI G.G., MATTESON J., SANCHEZ F., SCHANNE S., SCHOENFELDER V., SKINNER G., STRONG A., TEEGARDEN B., VEDRENNE G. and WUNDERER C.

Abstract (from CDS):

We present the analysis of the first observations of the Cygnus region by the SPI spectrometer onboard the Integral Gamma Ray Observatory, encompassing ∼600 ks of data. Three sources namely Cyg X-1, Cyg X-3 and EXO 2030+375 were clearly detected. Our data illustrate the temporal variability of Cyg X-1 in the energy range from 20keV to 300keV. The spectral analysis shows a remarkable stability of the Cyg X-1 spectra when averaged over one day timescale. The other goal of these observations is SPI inflight calibration and performance verification. The latest objective has been achieved as demonstrated by the results presented in this paper.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: observations - X-ray stars: individual: Cyg X-1, Cyg X-3, EXO 2030+375 - black hole: physics - space telescope: INTEGRAL: SPI

Simbad objects: 4

Full paper

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Number of rows : 4

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	HD 226868	HXB	19 58 21.6757355952	+35 12 05.784512688	9.38	9.72	8.91	8.42		O9.7Iabpvar	4590	0
2	NAME Cyg Complex	reg	20 32	+45.0						~	667	0
3	V* V2246 Cyg	HXB	20 32 15.2749858128	+37 38 14.843024844		22.16	19.41	17.32	15.18	B0Ve	480	0
4	V* V1521 Cyg	HXB	20 32 25.78	+40 57 27.9						WN4/5-6/7	2035	2

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