This creates a reduced catalogue, based on a selection expression. For instance, to get only the bright data from an SIS catalogue, say
xsel > select obscat ``DATAMODE.eq.'BRIGHT'"
The way it currently works, if a catalogue was made with the make obscat command, then that catalogue is overwritten by the reduced catalogue. Consequently, if you plan to go back to the original catalogue, you should save it first with save obscat. It can then be restored with the load command.
However, if the original catalogue was entered with the load command, it is not overwritten, though Xselect daes not keep track of the parents of any of the reduced catalogues. This facility will be added in the next release.
Parameters:
NAME TYPE PROMPT DEFAULT ===================================================================== mkf_dir STRING Enter the filter file directory save_file BOOLEAN Do you want to save it before proceeding yes select_what STRING What sort of selection? mkf make_inst STRING Which instrument? event_sel STRING Selection criteria hk_sel STRING Enter Selection string cat_sel STRING Enter catalogue filter mkf_exp STRING Boolean expression for filter file select data_dir STRING Enter the Event file dir [mkf_name] STRING Enter filter file name def [mkf_def_expr]STRING The default r. exp. for MKF filenames fft*.fits ft*.mkf [select_str] STRING Dummy string for the select command NOT_ENTERED [select_str2] STRING Dummy string for the select command NOT_ENTERED