Description Usage Format Details Fields Source
Fermi Large Area Telescope First Source Catalog (1FGL). Abdo, A. A. et al., The Astrophysical Journal Supplement Series, 188, 405 (2010).
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A data frame with 89 variables on 1451 gamma-ray sources.
Initial Release: 14 Jan 2010 Latest Release: gll_psc_v03.fit (9 February 2010)
1FGL JHHMM.m+DDMM[c], constructed according to IAU Specifications for Nomenclature; m is decimal minutes of R.A.; in the name R.A. and decl. are truncated at 0.1 decimal minutes and 1' , respectively; 'c' indicates that based on the region of the sky the source is considered to be potentially confused with Galactic diffuse emission
Right Ascension, J2000, deg, three decimal places
Declination, J2000, deg, three decimal places
Galactic longitude, deg, three decimal places
Galactic latitude, deg, three decimal places
Semimajor radius of 68% confidence region, deg, three decimal places
Semiminor radius of 68% confidence region, deg, three decimal places
Position angle of 68% confidence region, deg. east of north, 0 decimal places
Semimajor radius of 95% confidence region, deg, three decimal places
Semiminor radius of 95% confidence region, deg, three decimal places
Position angle of 95% confidence region, deg. east of north, 0 decimal places
Significance derived from likelihood TS for 100 MeV\342\200\223100 GeV analysis, one decimal place
Energy at which error on differential flux is minimal, in MeV
Differential flux at Pivot_Energy, in cm^-2 MeV^-1 s^-1
1 sigma error on differential flux at Pivot_Energy, in cm^-2 MeV^-1 s^-1
Best-fit power-law slope
1 sigma error on best-fit power-law slope
Integral flux from 1 to 100 GeV, in cm^-2 s^-1
1 sigma error on integral flux from 1 to 100 GeV, in cm^-2 s^-1
Energy flux from 100 MeV to 100 GeV, in erg cm^-2 s^-1
1 sigma error on energy flux from 100 MeV to 100 GeV, in erg cm^-2 s^-1
Measure of how spectrum follows power law (currently simple chi-squared)
Integral flux from 30 to 100 MeV (not filled)
1 sigma error on integral flux from 30 to 100 MeV (not filled)
Square root of the TS between 30 and 100 MeV (not filled)
Integral flux from 100 to 300 MeV, in cm^-2 s^-1
1 sigma error on integral flux from 100 to 300 MeV, in cm^-2 s^-1
Square root of the TS between 100 to 300 MeV
Integral flux from 100 to 300 MeV, in cm^-2 s^-1
1 sigma error on integral flux from 300 MeV to 1 GeV, in cm^-2 s^-1
Square root of the TS between 300 MeV to 1 GeV
Integral flux from 1 to 3 GeV, in cm^-2 s^-1
1 sigma error on integral flux from 1 to 3 GeV, in cm^-2 s^-1
Square root of the TS between 1 to 3 GeV
Integral flux from 3 to 10 GeV, in cm^-2 s^-1
1 sigma error on integral flux from 3 to 10 GeV, in cm^-2 s^-1
Square root of the TS between 3 to 10 GeV
Integral flux from 10 to 100 GeV, in cm^-2 s^-1
1 sigma error on integral flux from 10 to 100 GeV, in cm^-2 s^-1
Square root of the TS between 10 to 100 GeV
Measure of source variability (currently simple chi-squared)
Source significance in peak interval in sigma units
Peak integral flux from 100 MeV to 100 GeV, in cm^-2 s^-1
1 sigma error on peak integral flux, in cm^-2 s^-1
Time of center of interval in which peak flux was measured
Length of interval in which peak flux was measured
Integral flux from 100 MeV to 100 GeV in time interval 1 ... 11, in cm^-2 s^-1
Error on the integral flux from 100 MeV to 100 GeV in time interval 1 ... 11, in cm^-2 s^-1, using the method indicated in Unc_Flag_History column and added in quatrature with 3% systematic component.
1 if it is half of the difference between the 2 sigma upper limit and the maximum likelihood value given in Flux_History; 0 if it is the 1 sigma uncertainty derived from a significant detection in the interval.
Name of the corresponding 0FGL source, if any
Identification or positional associations with AGILE source
Identification or positional associations with 3EG source
Identification or positional associations with EGR source
Positional association with a TeVCat source, P for angular size < 40', E for extended, N if no TeV association
Class designation for most likely association. Capital letters indicate firm identifications; lower-case letters indicate associations: Pulsar (PSR), Pulsar wind nebula (PWN), Supernova remnant (SNR), Globular cluster (GLC), Micro-quasar object (MQO), High-mass binary (HXB), Blazar of the BL Lac type (BZB), Blazar of the FSRQ type (BZQ), Non-blazar active galaxy (AGN), Active galaxy of uncertain type (AGU), Normal galaxy (GAL), Starburst galaxy (SBG), Unassociated source ( ).
2nd class designation for associated source.
Name of identified or likely associated source.
Alternate name of identified or likely associated source.
Binary coding. See Table 4 of 1FGL paper for the definition of the various Analysis Flags.
http://fermi.gsfc.nasa.gov/ssc/data/access/lat/1yr_catalog/
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