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## FERMILGRB - Fermi LAT Second Gamma-Ray Burst Catalog |
HEASARC Archive |

**Name**

The designation of the burst. The naming scheme used is
GRByymmddfff, where yymmdd is the 2-digit year, month, and day of the burst
and fff the fraction of the day.

**Gcn_Name**

The designation of the burst in the Gamma-ray Coordinates Network
(GCN) distribution list.

**Time**

The date/time of the trigger.

**Trigger_MET**

The date/time of the trigger in Fermi Mission Elapsed Time (s).

**RA**

The detected Right Ascension of the burst in the specified equinox.

**Dec**

The detected Declination of the burst in the specified equinox.

**LII**

The Galactic Longitude of the burst.

**BII**

The Galactic Latitude of the burst.

**Error_Radius**

The localization error from LAT transient factory analysis
(deg).

**Redshift**

The redshift of the GRB, if available.

**Luminosity_Distance**

The luminosity distance calculated using the redshift of
the GRB (when available), (cm).

**Theta**

The off-axis angle at the time of the trigger (deg).

**Zenith**

The zenith angle at the time of the trigger (deg).

**Arr_Flag**

If the GRB triggered an Autonomous Repoint Request, this flag is set
to 1, otherwise is set to 0.

**Distance_To_Closest**

The distance to the closest 3FGL source (deg).

**Irfs**

The instrument response function used in the analysis.

**LLE_Bbbd_Sig**

The significance of the signal in the LAT Low Energy (LLE)
data using the Bayesian Blocks Burst Detection algorithm (sigma).

**LLE_Bbbd_Sig_Detected**

Indicates whether the GRB is detected in LLE data.

**LLE_T05**

The LLE onset time (s). A negative value means that the burst onset
occurred before the trigger time.

**LLE_T90**

The LLE duration time (s) defined as the interval during which the
instrument measures from 5% to 95% of the total GRB counts in the 50-300 keV
energy range (i.e., from lle_t05 to lle_t95).

**LLE_T95**

The LLE end time (s).

**Tl0**

The time when the first photon with probability p > 0.9 to be
associated with the GRB is detected in the 100 MeV - 100 GeV energy range (s).

**Tl100**

The LAT emission estimated duration, defined as tl0 to tl1 (s).

**Tl100_Error**

The estimated error on the LAT emission duration (s).

**Tl1**

The time when the last photon with probability p > 0.9 to be
associated with the GRB is detected in the 100 MeV - 100 GeV energy range (s).

**Tl0_Lower**

The estimated lower limit on the LAT emission onset time (s).

**Tl1_Upper**

The estimated upper limit on LAT emission end (s).

**Like_Best_T0**

The start of the time window for the likelihood analysis that
returned the highest value of Test Statistics (s).

**Like_Best_T1**

The end of the time window for the likelihood analysis that
returned the highest value of Test Statistics (s).

**Like_Best_TS**

The value of the Test Statistics obtained by likelihood
analysis that returned the highest value of Test Statistics.

**Like_Best_Flux**

The flux obtained by likelihood analysis that returned the
highest value of Test Statistics (ph/cm^{2}/s).

**Like_Best_Flux_Error**

The estimated error on the flux obtained by likelihood
analysis that returned the highest value of Test Statistics (ph/cm^{2}/s).

**Like_Best_Flux_Ene**

The energy flux obtained by likelihood analysis that
returned the highest value of Test Statistics (erg/cm^{2}/s).

**Like_Best_Flux_Ene_Error**

The estimated error on the energy flux obtained by
likelihood analysis that returned the highest value of Test Statistics
(erg/cm^{2}/s).

**Like_Best_Fluence**

The energy fluence obtained by likelihood analysis
that returned the highest value of Test Statistics (erg/cm^{2}).

**Like_Best_Fluence_Error**

The estimated error on the energy fluence obtained
by likelihood analysis that returned the highest value of Test Statistics
(erg/cm^{2}).

**Like_Best_GRBIndex**

The photon index of the power law that models the GRB in
the likelihood analysis that returned the highest value of Test Statistics.

**Like_Best_GRBIndex_Error**

The estimated error on the photon index of the power
law that models the GRB in the likelihood analysis that returned the highest
value of Test Statistics.

**Like_Best_Eiso_RF**

The rest frame isotropic energy from 100 MeV - 10 GeV in
the likelihood analysis that returned the highest value of Test Statistics
( erg).

**Like_Best_Eiso_RF_Error**

The estimated error on the rest frame isotropic
energy from 100 MeV - 10 GeV in the likelihood analysis that returned the
highest value of Test Statistics.

**Like_LAT_T0**

The start of the time window for the likelihood analysis in the
LAT time window (s).

**Like_LAT_T1**

The end of the time window for the likelihood analysis in the
LAT time window (s).

**Like_LAT_TS**

The value of the Test Statistics obtained by likelihood
analysis in the LAT time window.

**Like_LAT_Flux**

The flux obtained by likelihood analysis in the LAT time
window (ph/cm^{2}/s).

**Like_LAT_Flux_Error**

The estimated error on the flux obtained by likelihood
analysis in the LAT time window (ph/cm^{2}/s).

**Like_LAT_Flux_Ene**

The energy flux obtained by likelihood analysis in the LAT
time window (erg/cm^{2}/s).

**Like_LAT_Flux_Ene_Error**

The estimated error on the energy flux obtained by
likelihood analysis in the LAT time window (erg/cm^{2}/s).

**Like_LAT_Fluence**

The energy fluence obtained by likelihood analysis in
the LAT time window (erg/cm^{2}).

**Like_LAT_Fluence_Error**

The estimated error on the energy fluence obtained
by likelihood analysis in the LAT time window (erg/cm^{2}).

**Like_LAT_GRBIndex**

The photon index of the power law that models the GRB in
the likelihood analysis in the LAT time window.

**Like_LAT_GRBIndex_Error**

The estimated error on the photon index of the power
law that models the GRB in the likelihood analysis in the LAT time window.

**Like_LAT_Eiso_RF**

The rest frame isotropic energy from 100 MeV - 10 GeV in
the likelihood analysis in the LAT time window (erg).

**Like_LAT_Eiso_RF_Error**

The estimated error on the rest frame isotropic
energy from 100 MeV - 10 GeV in the likelihood analysis in the LAT time window
(erg).

**Like_GBM_T0**

The start of the time window for the likelihood analysis in the
GBM time window (s).

**Like_GBM_T1**

The end of the time window for the likelihood analysis in the
GBM time window (s).

**Like_GBM_TS**

The value of the Test Statistics obtained by likelihood
analysis in the GBM time window.

**Like_GBM_Flux**

The flux obtained by likelihood analysis in the GBM time
window (ph/cm^{2}/s).

**Like_GBM_Flux_Error**

The estimated error on the flux obtained by likelihood
analysis in the GBM time window (ph/cm^{2}/s).

**Like_GBM_Flux_Ene**

The energy flux obtained by likelihood analysis in the GBM
time window (erg/cm^{2}/s).

**Like_GBM_Flux_Ene_Error**

The estimated error on the energy flux obtained by
likelihood analysis in the GBM time window (erg/cm^{2}/s).

**Like_GBM_Fluence**

The energy fluence obtained by likelihood analysis in
the GBM time window (erg/cm^{2}).

**Like_GBM_Fluence_Error**

The estimated error on the energy fluence obtained
by likelihood analysis in the GBM time window (erg/cm^{2}).

**Like_GBM_GRBIndex**

The photon index of the power law that models the GRB in
the likelihood analysis in the GBM time window.

**Like_GBM_GRBIndex_Error**

The estimated error on the photon index of the power
law that models the GRB in the likelihood analysis in the GBM time window.

**Like_GBM_Eiso_RF**

The rest frame isotropic energy from 100 MeV - 10 GeV in
the likelihood analysis in the GBM time window (erg).

**Like_GBM_Eiso_RF_Error**

The estimated error on the rest frame isotropic
energy from 100 MeV - 10 GeV in the likelihood analysis in the GBM time window
(erg).

**Like_Ext_T0**

The start of the time window for the likelihood analysis in the
EXT time window (s).

**Like_Ext_T1**

The end of the time window for the likelihood analysis in the
EXT time window (s).

**Like_Ext_TS**

The value of the Test Statistics obtained by likelihood
analysis in the EXT time window.

**Like_Ext_Flux**

The flux obtained by likelihood analysis in the EXT time
window (ph/cm^{2}/s).

**Like_Ext_Flux_Error**

The estimated error on the flux obtained by likelihood
analysis in the EXT time window (ph/cm^{2}/s).

**Like_Ext_Flux_Ene**

The energy flux obtained by likelihood analysis in the EXT
time window (erg/cm^{2}/s).

**Like_Ext_Flux_Ene_Error**

The estimated error on the energy flux obtained by
likelihood analysis in the EXT time window (erg/cm^{2}/s).

**Like_Ext_Fluence**

The energy fluence obtained by likelihood analysis in
the EXT time window (erg/cm^{2}).

**Like_Ext_Fluence_Error**

The estimated error on the energy fluence obtained
by likelihood analysis in the EXT time window (erg/cm^{2}).

**Like_Ext_GRBIndex**

The photon index of the power law that models the GRB in
the likelihood analysis in the EXT time window.

**Like_Ext_GRBIndex_Error**

The estimated error on the photon index of the power
law that models the GRB in the likelihood analysis in the EXT time window.

**Like_Ext_Eiso_RF**

The rest frame isotropic energy from 100 MeV - 10 GeV in
the likelihood analysis in the EXT time window (erg).

**Like_Ext_Eiso_RF_Error**

The estimated error on the rest frame isotropic
energy from 100 MeV - 10 GeV in the likelihood analysis in the EXT time window
(erg).

**Ext_Emission_Max_Ene**

The maximum energy of the event with >90%
probability to be associated with the GRB, calculated during the time resolved
analysis (MeV).

**Ext_Emission_Max_Ene_P**

The probability of the event with maximum
energy calculated during the time resolved analysis.

**Ext_Emission_Max_Ene_T**

The arrival time of the event with maximum
energy calculated during the time resolved analysis (s).

**Ext_Emission_N**

The number of events with probability >90% to
be associated with the GRB, calculated during the time resolved analysis.

**LAT_Bpl_Chi2**

The value of the chi^{2} obtained by fitting the LAT light curve
with a broken power law model.

**LAT_Bpl_F0**

The normalization of the broken power law model.

**LAT_Bpl_F0_Error**

The error on the normalization of the broken power law model.

**LAT_Bpl_Index1**

The first index of the broken power law model.

**LAT_Bpl_Index1_Error**

The error on the first index of the broken power law model.

**LAT_Bpl_Index2**

The second index of the broken power law model.

**LAT_Bpl_Index2_Error**

The error on the second index of the broken power law model.

**LAT_Bpl_Timebreak**

The time of the break (s).

**LAT_Bpl_Timebreak_Error**

The error on the time of the break (s).

**LAT_Spl_Chi2**

The value of the chi^{2} obtained by fitting the LAT light curve
with a simple power law model.

**LAT_Spl_Index1**

The index of the simple power law model.

**LAT_Spl_Index1_Error**

The error on the index of the simple power law model.

**LAT_F0**

The normalization of the simple power law model.

**LAT_F0_Error**

The error on the normalization of the simple power law model.

**Late_Index**

The index that best describe the behavior at late time (either
LAT_BPL_IN2 or LAT_SPL_IN1, depending on the value of the respective chi^{2}.

**Late_Index_Error**

The error on the index that best describe the behavior at
late time.

**Su_Tsinput**

The test statistic resulting from the LAT transient factory
detection algorithm.

**GBM_Cat_Name**

The designation of the GRB in the Fermi GBM GRB catalog.

**GBM_Cat_T05**

The GBM T05, when available. Otherwise this number is set to 0
(s).

**GBM_Cat_T90**

The GBM T90, when available. Otherwise this number correspond to
the estimated duration of the prompt emission (s).

**GBM_Cat_T90_Error**

The error on the GBM T90 from the Fermi GBM GRB catalog (s).

**GBM_Cat_T95**

The calculated as GBMT90+GBMT05 (s).

**GBM_Cat_Fluence**

The fluence in the 10 keV-1 MeV energy band, from the Fermi GBM GRB
catalog (erg/cm^{2}/s).

**GBM_Cat_Fluence_Error**

The error on the fluence in the 10 keV-1 MeV energy
band, from the Fermi GBM GRB catalog (erg/cm^{2}/s).