Start by going to the directory of the cluster NGC 129
> ngc 0129
> ubv all commands entered without argument produce a listing of the entire file, one page at a time.
Query by star number:
> ubv 200 list the UBV data of star 200 (DL Cas)
> ref -m display the references of these data.
> ubv -r 200 equivalent to the preceding two commands.
> ubv 164 170 200 list the UBV data of the three stars.
> ubv -u 1341 200 select the data for star 200 from reference 1341.
> ubv -a 200 compute the mean value.
> ubv hd -id 236429 query by HD number.
> ubv -f no.lst search for the UBV data for a list of stars contained in a file, here no.lst.
Selection on UBV parameters or reference:
> ubv v -lt 9.0 select the stars with V < 9.0.
> ubv b-v -gt 1.8 select stars with B-V > 1.8.
> ubv no -lt 10 list the stars with numbers less than 10
> ubv ref -eq 1341 select data from the reference 1341.
> ubv ref -ne 1341 select data from any reference except 1341.
Options common to most data commands:
> ubv -d 10 give the list of sources that have 10 stars or more and the number of stars.
> ubv -dr 10 produce the same output as "ubv -d", but list also the corresponding references.
> ubv -nb 3 list the stars with at least three sources.
> ubv -sort v produce an output sorted by V mag.
> ubv -t count the number of measurements and stars.
> ubv -h display the description of the command.
Option specific to the ubv command:
> ubv -y give the results of the UBV data comparaison.
> ubv -plt plot photometric diagram.
Most other commands handling photometric data (see Appendix A, table A.1)) behave similarily. This is especially true for the commands that handle UBV type data pgh ccd sit cam. The options -d, -dr, -nb, -t and -h are common to commands handling referenced data.