SIMBAD references

We present evidence of 1612-MHz emission in SR variable stars. The two SRb, RT Vir and R Crt, as well as the SRa W Hya have been monitored with the upgraded Nancay radio telescope since February 2001. All three objects have shown a weak 1612-MHz emission occuring in the velocity range of the strongest emission observed in the main-lines. Such a detection is the second observational evidence for emission in the 1612-MHz OH maser satellite line from SRb stars. It also confirms the presence of 1612-MHz emission in the SRa W Hya discovered by Etoka et al. (2001A&A...378..522E). Such a finding strongly suggests that the shell properties of those three objects are quite similar to those of the Mira stars with similar IR characteristics.