## Fermi Light Curve Repository Data Description |

Date: | Mid point of time bin in UTC. |

Julian date: | Mid point of time bin in JD. |

MET: | Mid point of time bin in Mission Elapsed Time (MET). |

TS: | The likelihood Test Statistic. |

Photon Flux: | Average integrated photon flux with energies from 0.1 to 100 GeV. Units in photons/cm^2/s. |

Photon Flux Error: | 1-sigma symmetric gaussian equivalent statistical uncertainty based on the inverse-Hessian at the optimum of the log-likelihood surface. Units in photons/cm^2/s. |

Energy Flux: | Average integrated energy flux with energies from 0.1 to 100 GeV. Units in MeV/cm^2/s. |

Energy Flux Error: | 1-sigma symmetric gaussian equivalent statistical uncertainty based on the inverse-Hessian at the optimum of the log-likelihood surface. Units in MeV/cm^2/s. |

Photon Index: | Average photon index, if the spectral model for the source in the FGL catalog used by the LCR is a power-law. Average alpha, if the spectral model for the source in the FGL catalog used by the LCR is a logparabola (beta is fixed to the catalog value). |

Photon Index Error: | 1-sigma symmetric gaussian equivalent photon index error |

Fit Tolerance: | Relative fit tolerance. |

MINUIT Return Code: | Anything other than '0' means that the analysis did not converge. Please read the caveats about non-convergent analyses. |

Analysis Log: | Complete LAT analysis runtime output of data within the time invertal of the bin. |

Some of the objects below are provided as arrays of 2-tuples where the first element is the center of the bin time interval (in MET).

ts: | The likelihood Test Statistic. |

flux: | Average integrated photon flux or energy flux of photons with energies from 0.1 to 100 GeV. Units in photons/cm^2/s if photon flux is selected, MeV/cm^2/s if energy flux is selected. |

flux_upper_limits: | 95% Photon flux upper limits, in photons/cm^2/s, or energy flux upper limits in MeV/cm^2/s. |

flux_error: | 1-sigma symmetric gaussian equivalent statistical uncertainty in photons/cm^2/s if photon flux is selected, MeV/cm^2/s if energy flux is selected. |

photon_index: | Photon index if source spectral shape is power-law, alpha if it is logparabola. |

photon_index_error: | 1-sigma symmetric gaussian equivalent photon index/alpha statistical uncertainty. |

fit_tolerance: | Relative fit tolerance. |

fit_convergence: | MINUIT return code. Anything other than '0' means that the analysis did not converge. Please read the caveats about non-convergent analyses. |

dlogl: | Delta log-likelihood between a fixed index and free index fit. The difference in degrees of freedom between these two hypothesis is of 1 for both power-law and logparabola spectral models (beta is fixed to the catalog value). |

EG: | Isotropic diffuse background Normalization. |

GAL: | Galactic diffuse background Prefactor. |

bin_id: | Time bin number. |