SPI/INTEGRAL observation of the Cygnus region

Abstract

We present the analysis of the first observations of the Cygnus region by the SPI spectrometer onboard the Integral Gamma Ray Observatory, encompassing $\sim$ 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 20 keV to 300 keV. 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.

arXiv comment6 pages, 10 figures, accepted for publication in A&A (special INTEGRAL volume)

References in corpus (8)

• The Soft Gamma-Ray Spectral Variability of Cygnus X-1
• SPI/INTEGRAL in-flight performance
• Neutrino flux predictions for known Galactic microquasars
• A Decade in the Life of EXO 2030+375: A Multi-wavelength Study of an Accreting X-ray Pulsar
• Discovery of Correlated Behavior Between the HXR and the Radio Bands in Cygnus X-3
• The Spiros imaging software for the Integral SPI spectrometer
• INTEGRAL timing and localization performance
• Disk-Jet Connection in Cygnus X-3

Cited by in corpus (13)

• SPI/INTEGRAL in-flight performance
• The broad-band spectrum of Cygnus X-1 measured by INTEGRAL
• Bimodal spectral variability of Cygnus X-1 in an intermediate state
• The magnetic field in the X-ray corona of Cygnus X-1
• The Spiros imaging software for the Integral SPI spectrometer
• The INTEGRAL view on Black Hole X-ray Binaries
• Potential origin of the state-dependent high-energy tail in the black hole microquasar Cygnus X-1 as seen with INTEGRAL
• INTEGRAL observations of the Be/X-ray binary EXO 2030+375 during outburst
• Very massive star winds as sources of the short-lived radioactive isotope ${}^{26}$Al
• INTEGRAL discovery of a high-energy tail in the microquasar Cygnus X-3
• NuSTAR spectral analysis beyond 79 keV with stray light
• High-energy observations of black hole binaries with the INTEGRAL satellite
• Observing with a space-borne gamma-ray telescope: selected results from INTEGRAL