Spectroscopic Data

Spectroscopic data kept in BDA concern spectral classification on the MK or Harvard systems, radial velocities, rotational velocities and orbits of spectroscopic binaries. Abundances of chemical elements will be included in a next version.

The names of the commands working with spectroscopic datatypes are usually identical to the datatypes by sake of simplicity. The meaning of the various options can be obtained with the command option.

The datatype corresponding to a given kind of observations can be learned with the command dtype.

The field structure of the records for each photometric data file can be queried with the command field.

The names of the file associated to a given type of data can be found with the comand nfile.

The names of the commands working with spectroscopic datatypes are usually identical to the datatypes by sake of simplicity. The meaning of the various options can be obtained with the command option.