2023-05-05 Known issue on two false-positive sources in the astrometric binary solutions.

During validation of epoch astrometry for Gaia DR4, an error was discovered, that had already had an impact on the Gaia DR3 non-single star results. The investigation showed that two specific targets suffered of this software bug. We can conclude that the solutions for Gaia DR3 4698424845771339520 (WD 0141-675; also the entry in gaiadr3.binary_masses is no longer valid as it was based on the orbit solution) and Gaia DR3 5765846127180770432 (HIP 64690) both are false-positives as far as Gaia non-single star processing is concerned. Note that the astrometric and other parameters of these objects in the gaiadr3.gaia_source table in the archive are not affected by this issue. Investigations continue to assess if any additional sources have been impacted. Find this known issue also here.