SIMBAD references

The COMPTEL telescope on board the Compton Gamma-Ray Observatory (CGRO) is capable of imaging gamma-ray line sources in the MeV region at a sensitivity of about 10^–5photons/(cm²s). During the period August 1991 to August 1993 of the observation program of CGRO, several recent Galactic novae, some of which were later claimed to be neon-type novae, were in the COMPTEL field of view on a number of occasions. We searched for the ²²Na line at 1.275MeV from the neon-type novae. No positive detection can be reported. Combining the upper limits to the fluxes from these novae we are able to derive an average 2 σ upper limit for any neon-type novae in the Galactic disk of the order of 3x10^–5/(cm²s), which translates into an upper limit of the ejected ²²Na mass of 3.7x10^–8M_☉ . This COMPTEL limit severely constrains modern theories of novae.