Searches for signal excursions beyond a specified threshold, in a series of time series data, dedispersed for a range of Dispersion Measures (DMs). The time series files can be input in any order of DM. The data files should be in the SIGPROC .tim format.

Usage:

• -h or --help: Display this usage information.
• -n or --nsamp samples: Number of time samples read in one block (default is 4096 samples).
• -t or --threshold: Threshold in sigmas.
• -g or --graphics: Turn on plotting.
• -i or --invert: Invert background and foreground colours in plots (default is white on black).
• -e or --non-interactive: Run in non-interactive mode.
• -v or --version: Display the version.

The data file name may be a composed of standard shell wildcards such as * or ?.

Example:

Sifts the time series in data.dm0.tim, data.dm1.tim, ..., data.dm100.tim for pulses above a 6-sigma threshold, assuming that there are no other files in the current directory that match the wildcard expansion of 'data.dm*.tim'.