giggseh/kepler-lc-star-params

---
license: mit
tags:
- astronomy
- kepler
- lightcurves
- exoplanets
pretty_name: Kepler Lightcurves Star Params
---

# Kepler Stellar Lightcurves

Complete Kepler mission lightcurves for ~190,000 stars, paired with stellar parameters.
Each shard contains 500 stars.

## Fields

| Field | Type | Description |
|-------|------|-------------|
| `target_id` | int | Kepler Input Catalog (KIC) ID |
| `flux` | list\<float32\> | Brightness measurements, normalised to median = 1.0 |
| `time` | list\<float64\> | Timestamps (BJD - 2454833.0, days) |
| `n_points` | int | Number of measurements |
| `duration_days` | float | Observation span |
| `Teff` | float | Effective temperature (K) |
| `logg` | float | Surface gravity (dex) |
| `radius` | float | Stellar radius (R☉) |
| `mass` | float | Stellar mass (M☉) |
| `FeH` | float | Metallicity [Fe/H] (dex) |
| `age` | float | Stellar age (Gyr) |

## Processing

Extracted from Kepler DR25 FITS files with minimal transformation:

1. **PDCSAP_FLUX** used (Kepler pipeline already removed spacecraft systematics)
2. Quality-flagged points removed (`SAP_QUALITY == 0` only)
3. NaN values removed
4. All quarters stitched into one time series per star
5. Flux divided by median (normalised to ~1.0)

No detrending, flattening, or outlier removal applied.

## Stellar Parameter Sources

- Teff, logg, radius, mass, FeH: NASA Exoplanet Archive Q1-Q17 DR25 Supplemental Stellar (Mathur et al. 2017)
- Age: Berger et al. (2020) Gaia-Kepler Stellar Properties Catalog

## Raw Data

FITS files from MAST: `https://archive.stsci.edu/missions-and-data/kepler/kepler-bulk-downloads`