SIMBAD references

New high temporal and spectral resolution observations of the CaIIK absorption profile of the δScuti star ρ Puppis are presented. The data cover 1.2 pulsation cycle. Contrary to the result of Dravins et al. (1977A&A....54..381D) the line profile corresponding to the phase just before the maximum acceleration (monitored twice here), does not show any emission feature. Thus, the CaIIK emission may be of transient nature. Consequently, the intensity of the shock wave should be weak and strongly variable. This result is consistent with a previous study (Mathias et al., 1997A&A...327.1077M) where no shock wave signature was present in the Hα and metallic line profiles observed. Thus, additional observations are required to specify the frequency of occurrence of the transient emission.