SIMBAD references

Significant 1.8 MeV emission from the Cygnus region, attributed to the decay of radioactive ²⁶Al, has been detected by COMPTEL. The COMPTEL sky-map shows diffuse, localized emission from this region with an integrated flux of (7.0±1.4).10^–5photons/cm²/s at a significance level of 5σ. A study of ²⁶Al candidate sources in the Cygnus region results in a 1.8MeV emission model that agrees well with the observed structure and intensity. Our analysis indicates that in the Cygnus region ²⁶Al has mainly been produced by the combined nucleosynthesis activity of numerous young massive objects such as Wolf-Rayet stars and core collapse supernovae.