SourceCatalogGammaCat#

class gammapy.catalog.SourceCatalogGammaCat(filename='$GAMMAPY_DATA/catalogs/gammacat/gammacat.fits.gz')[source]#

Bases: SourceCatalog

Gammacat open TeV source catalog.

See: gammapy/gamma-cat

One source is represented by SourceCatalogObjectGammaCat.

Parameters:

filenamestr: Path to the gamma-cat fits file.

Examples

Load the catalog data:

>>> import matplotlib.pyplot as plt
>>> import astropy.units as u
>>> from gammapy.catalog import SourceCatalogGammaCat
>>> cat = SourceCatalogGammaCat()

Access a source by name:

>>> source = cat['Vela Junior']

Access source spectral data and plot it:

>>> ax = plt.subplot()
>>> energy_range = [1, 10] * u.TeV
>>> source.spectral_model().plot(energy_range, ax=ax) 
>>> source.spectral_model().plot_error(energy_range, ax=ax) 
>>> source.flux_points.plot(ax=ax) 

Attributes Summary

`description`
`positions`	Source positions as a `SkyCoord` object.
`tag`

Methods Summary

`row_index`(name)	Look up row index of source by name.
`source_name`(index)	Look up source name by row index.
`to_models`(**kwargs)	Create Models object from catalog.

Attributes Documentation

description = 'An open catalog of gamma-ray sources'#

positions#: Source positions as a SkyCoord object.

tag = 'gamma-cat'#

Methods Documentation

row_index(name)#

Look up row index of source by name.

Parameters:

namestr: Source name.

Returns:

indexint: Row index of source in table.

source_name(index)#

Look up source name by row index.

Parameters:

indexint: Row index of source in table.

to_models(**kwargs)#: Create Models object from catalog.