SPI/INTEGRAL observation of 1809 keV gamma-ray line emission from the   Cygnus X region
  We present first results on the observation of 1809 keV gamma-ray line emission from the Cygnus X region with the SPI imaging spectrometer. Our analysis is based on data from the performance verification phase of the INTEGRAL instruments and comprises 1.3 Ms of exposure time. We observe a 1809 keV line flux of (7.3 +/- 0.9) x 10-5 ph cm-2 s-1 from a region delimited by galactic longitudes 73-93 deg and |b| < 7 deg at a significance level of 8 sigma. The 1809 keV line appears moderately broadened, with an intrinsic FWHM of 3.3 +/- 1.3 keV. Although this broadening is only marginal (at the 2 sigma level our data are compatible with an unbroadened line), it could reflect the 26Al ejecta kinematics. 
J. Kn\"odlseder, M. Valsesia, M. Allain, S. Boggs, R. Diehl, P. Jean,   K. Kretschmer, J.-P. Roques, V. Sch\"onfelder, G. Ve...