# Fast Lightcurve Inspector (FLI)

> FLI is a web-based tool for analyzing TESS (Transiting Exoplanet Survey Satellite) lightcurve data. It helps astronomers analyze exoplanet transits, eclipsing binaries, and other variable star phenomena.

## What FLI Does
- Fetches and displays TESS lightcurve data by TIC (TESS Input Catalog) number
- Supports multiple data pipelines: QLP, SPOC, GSFC-ELEANOR-LITE, TESS-SPOC
- Period finding using BLS (Box Least Squares) and Lomb-Scargle periodograms
- Phase folding for transit and eclipse analysis
- Vetting tools: centroid shift analysis, odd/even transit depth comparison, secondary eclipse detection
- Gaia DR3 neighbor queries for contamination assessment
- Pixel-level lightcurve analysis

## Use Cases
- Exoplanet transit detection and characterization
- Eclipsing binary (EB) analysis and period determination
- Variable star classification
- TESS Object of Interest (TOI) vetting
- False positive identification

## Target Users
- Professional astronomers and astrophysicists
- Graduate students in astronomy
- Variable star researchers
- Citizen scientists participating in exoplanet discovery

## How to Use
1. Enter a TIC (TESS Input Catalog) number
2. Select the data pipeline (QLP, SPOC, etc.)
3. View the lightcurve plot
4. Run BLS or Lomb-Scargle to find orbital periods
5. Phase-fold the data to confirm periodic signals
6. Use vetting tools to rule out false positives

## Data Sources
- MAST (Mikulski Archive for Space Telescopes)
- TESS mission data products
- Gaia DR3 catalog

## Links
- Website: https://www.fast-lightcurve-inspector.app
- Contact: julien@fast-lightcurve-inspector.app