The command aud (for "autre donnees" = other data) obtains other kinds of data for a sample created with a data handling command, like ubv, mk, vsn and so on. Let us first move to the NGC 2516 directory.
> ngc 2516
> vsn V -gt 270 form a sample with stars having a rotational velocity larger than 270 km/s.
> aud mk list the spectral types for that sample
> aud prob list the membership probabilities.
> aud -s rem list the remarks, but the sample has been redefined by the output of the preceding command. This is useful whenever data are not found for all stars.
> rem -k SB search for the spectroscopic binaries.
> aud vsn list the Vsini for the binaries.
> mk ts -eq B8 V select the B8 V stars.
> aud betam display the mean H values.
The command aud is also used to extract data for a predefined list of stars, or stars contained in a BDA file.
> aud -f gK ddo display the DDO data for the red giants contained in the file gK. Even if the file is normally compressed, do not add the .Z suffix
> aud -v gK ddo list the red giants which do not have DDO data
> aud -t cmd coo display the coordinates for the stars that have mean UBV data.
> aud -v cmd coo list the stars that have mean UBV data, but no coordinates. The argument to -v is a data type.