def make_tevcat_exclusion_mask():
"""Create an all-sky exclusion mask containing all TeVCat sources
Returns
-------
mask : `~gammapy.image.SkyImage`
Exclusion mask
"""
from gammapy.catalog import load_catalog_tevcat
tevcat = load_catalog_tevcat()
all_sky_exclusion = SkyImage.empty(nxpix=3600,
nypix=1800,
binsz=0.1,
fill=1,
dtype='int')
coords = all_sky_exclusion.coordinates()
lons = coords.l
lats = coords.b
for source in tevcat:
lon = Longitude(source['coord_gal_lon'], 'deg')
lat = Latitude(source['coord_gal_lat'], 'deg')
x = Angle(source['size_x'], 'deg')
y = Angle(source['size_y'], 'deg')
if np.isnan(x) and np.isnan(y):
rad = Angle('0.3 deg')
else:
rad = x if x > y else y
mask = lon_lat_circle_mask(lons, lats, lon, lat, rad)
all_sky_exclusion.data[mask] = 0
all_sky_exclusion.meta["EXTNAME"] = "EXCLUSION"
return all_sky_exclusion
def make_tevcat_exclusion_mask():
"""Create an all-sky exclusion mask containing all TeVCat sources
Returns
-------
mask : `~gammapy.image.ExclusionMask`
Exclusion mask
"""
# TODO: make this a method ExclusionMask.from_catalog()?
from gammapy.catalog import load_catalog_tevcat
tevcat = load_catalog_tevcat()
all_sky_exclusion = ExclusionMask.empty(nxpix=3600, nypix=1800, binsz=0.1,
fill=1, dtype='int')
val_lon, val_lat = all_sky_exclusion.coordinates()
lons = Longitude(val_lon, 'deg')
lats = Latitude(val_lat, 'deg')
for source in tevcat:
lon = Longitude(source['coord_gal_lon'], 'deg')
lat = Latitude(source['coord_gal_lat'], 'deg')
x = Angle(source['size_x'], 'deg')
y = Angle(source['size_y'], 'deg')
if np.isnan(x) and np.isnan(y):
rad = Angle('0.3 deg')
else:
rad = x if x > y else y
mask = lon_lat_circle_mask(lons, lats, lon, lat, rad)
all_sky_exclusion.data[mask] = 0
return all_sky_exclusion
def make_tevcat_exclusion_mask():
"""Create an all-sky exclusion mask containing all TeVCat sources
Returns
-------
mask : `~gammapy.image.ExclusionMask`
Exclusion mask
"""
from gammapy.catalog import load_catalog_tevcat
tevcat = load_catalog_tevcat()
all_sky_exclusion = make_empty_image(nxpix=3600, nypix=1800, binsz=0.1)
val = np.ones(shape=all_sky_exclusion.data.shape)
all_sky_exclusion.data = val
val_lon, val_lat = coordinates(all_sky_exclusion)
lons = Longitude(val_lon, 'deg')
lats = Latitude(val_lat, 'deg')
for source in tevcat:
lon = Longitude(source['coord_gal_lon'], 'deg')
lat = Latitude(source['coord_gal_lat'], 'deg')
x = Angle(source['size_x'], 'deg')
y = Angle(source['size_y'], 'deg')
if np.isnan(x) and np.isnan(y):
rad = Angle('0.3 deg')
else:
rad = x if x>y else y
mask = lon_lat_circle_mask(lons, lats, lon, lat, rad)
all_sky_exclusion.data[mask] = 0
return ExclusionMask.from_hdu(all_sky_exclusion)