To improve the quality of SIMBAD contents you can contact the CDS staff by email to warn an error that should be corrected.
If you think a data from a paper is missing, please, check before the CDS Status if it is still in the process pipeline on the web page of the concerned paper in SIMBAD: https://simbad.cds.unistra.fr/simbad/sim-fref
Old specific annotation service is currently under maintenance.