6533b834fe1ef96bd129cb50

RESEARCH PRODUCT

SPI/INTEGRAL observation of the Cygnus region

G. G. LichtiF. SanchezJ. MattesonS. SchanneV. SchönfelderRoland DiehlElisabeth JourdainMichel CasseP. DurouchouxP. Von BallmoosGerald K. SkinnerA. Von KienlinP. JeanS. E. BoggsC. B. WundererAndrew W. StrongJürgen KnödlsederG. VedrenneJean-pierre RoquesP. MandrouLaurent BouchetBonnard J. TeegardenPierre LeleuxBertrand CordierP. A. Caraveo

subject

Physics010504 meteorology & atmospheric sciencesSpectrometerAstrophysics (astro-ph)Gamma rayFOS: Physical sciencesobservations [gamma rays]Astronomy and AstrophysicsAstrophysicsphysics [black hole]Astrophysics01 natural sciencesSpectral line[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]Space and Planetary ScienceObservatory0103 physical sciencesCalibrationindividual : Cyg X-1 Cyg X-3 EXO 2030+375 [X-ray stars]INTEGRAL : SPI [space telescope]Spectral analysis010303 astronomy & astrophysics0105 earth and related environmental sciences

description

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.

https://hal.archives-ouvertes.fr/hal-00012142