The Command dtype

The command dtype is used in two different situations. When information on the kind of observational data a datatype refers to, the syntax is:

dtype data-type

Conversely, if one wishes to know the datatype dsignation corresponding to some data, the syntax is:

dtype data-designation.

This will list all the lines in which the data is mentionned.

Examples:

dtype ubv: display information on the data represented by the datatype ubv
dtype UBV: display the list of datatypes that correspond to the various kinds of UBV data
dtype CCD: display the datatypes corresponding to CCD data.

The last command will produce the following output:

 Type        Data

 ccd         CCD measurements in the UBV system 
 ccdric      CCD measurements in Cousins's RI system 
 ccdy        CCD measurements in the uvby system