FLITS

Fast-Look Interactive Transient Suite.

FLITS is browser-based FRB analysis software for interactive burst inspection, masking, measurement, DM optimization, temporal/spectral diagnostics, and export. It reads SIGPROC filterbank (.fil), search-mode PSRFITS (.fits, .sf), and CHIME/FRB HDF5 (.h5, .hdf5) including public catalog waterfalls and beamformed BBData tiedbeam_power files. The I/O layer is pluggable — third parties can register custom formats via importlib entry points without forking.

Quick Start

Install the published package:

pip install flits
flits --data-dir /path/to/filterbanks --host 127.0.0.1 --port 8123

Then open http://127.0.0.1:8123.

Optional scattering fits use fitburst, which is intentionally left out of the PyPI dependency metadata because package indexes reject direct URL runtime dependencies. To enable the fitburst-backed fitting workflow after installing FLITS:

pip install "fitburst @ https://github.com/CHIMEFRB/fitburst/archive/3c76da8f9e3ec7bc21951ce1b4a26a0255096b69.tar.gz"

Highlights

• Browser-based workflow for burst inspection on SIGPROC, PSRFITS, and CHIME/FRB HDF5 data.
• CHIME support includes public catalog waterfalls and beamformed BBData power products.
• Interactive crop, event, off-pulse, spectral-window, and masking controls.
• Calibrated fluence and peak-flux outputs when an SEFD is available.
• DM optimization using integrated-event S/N and DMphase.
• Temporal-structure, PSD, ACF, and optional fitburst-backed scattering tools.
• Export bundles and JSON session snapshots for reproducible analysis.

Documentation

• Full docs: dirkkuiper.github.io/flits
• Getting started: Quickstart
• Installation and deployment: Installation
• Developer testing: Testing
• Developer publishing: Publishing

The docs cover Python installs, Docker, Apptainer, remote/HPC use, interactive workflow guidance, measurements, DM optimization, temporal/spectral analysis, exports, and release procedures.

Release Channels

• PyPI and ghcr.io/dirkkuiper/flits:latest track stable releases.
• ghcr.io/dirkkuiper/flits:<version> pins an exact release.
• ghcr.io/dirkkuiper/flits:edge tracks the current main branch for snapshot testing.

Citation

If you use FLITS in research, cite the software and link to the repository:

• PyPI package: flits
• Repository: https://github.com/DirkKuiper/flits
• Citation metadata: CITATION.cff

License

FLITS is released under the GNU GPLv3. See LICENSE.