fetch_fermi_catalog

gammapy.catalog.fetch_fermi_catalog(catalog, extension=None)[source]

Fetch Fermi catalog data.

Reference: http://fermi.gsfc.nasa.gov/ssc/data/access/lat/.

The Fermi catalogs contain the following relevant catalog HDUs:

  • 3FGL Catalog : LAT 4-year Point Source Catalog
    • LAT_Point_Source_Catalog Point Source Catalog Table.
    • ExtendedSources Extended Source Catalog Table.
  • 2FGL Catalog : LAT 2-year Point Source Catalog
    • LAT_Point_Source_Catalog Point Source Catalog Table.
    • ExtendedSources Extended Source Catalog Table.
  • 1FGL Catalog : LAT 1-year Point Source Catalog
    • LAT_Point_Source_Catalog Point Source Catalog Table.
  • 2FHL Catalog : Second Fermi-LAT Catalog of High-Energy Sources
    • Count Map AIT projection 2D count image
    • 2FHL Source Catalog Main catalog
    • Extended Sources Extended Source Catalog Table
    • ROIs Regions of interest
  • 1FHL Catalog : First Fermi-LAT Catalog of Sources above 10 GeV
    • LAT_Point_Source_Catalog Point Source Catalog Table.
    • ExtendedSources Extended Source Catalog Table.
  • 2PC Catalog : LAT Second Catalog of Gamma-ray Pulsars
    • PULSAR_CATALOG Pulsar Catalog Table.
    • SPECTRAL Table of Pulsar Spectra Parameters.
    • OFF_PEAK Table for further Spectral and Flux data for the Catalog.
Parameters:

catalog : {‘3FGL’, ‘2FGL’, ‘1FGL’, ‘1FHL’, ‘2FHL’, ‘2PC’}

Specifies which catalog to display.

extension : str

Specifies which catalog HDU to provide as a table (optional). See list of catalog HDUs above.
Returns:

hdu_list (Default) : HDUList

Catalog FITS HDU list (for access to full catalog dataset).

catalog_table : Table

Catalog table for a selected hdu extension.

Examples

>>> from gammapy.catalog import fetch_fermi_catalog
>>> fetch_fermi_catalog('2FGL')
    [<astropy.io.fits.hdu.image.PrimaryHDU at 0x3330790>,
     <astropy.io.fits.hdu.table.BinTableHDU at 0x338b990>,
     <astropy.io.fits.hdu.table.BinTableHDU at 0x3396450>,
     <astropy.io.fits.hdu.table.BinTableHDU at 0x339af10>,
     <astropy.io.fits.hdu.table.BinTableHDU at 0x339ff10>]

>>> from gammapy.catalog import fetch_fermi_catalog
>>> fetch_fermi_catalog('2FGL', 'LAT_Point_Source_Catalog')
    <Table rows=1873 names= ... >