def main(args=None):
p = parser()
opts = parser().parse_args(args)
import astropy_healpix as ah
import astropy.units as u
try:
from mocpy import MOC
except ImportError:
p.error('This command-line tool requires mocpy >= 0.8.2. '
'Please install it by running "pip install mocpy".')
from ..io import read_sky_map
# Read multi-order sky map
skymap = read_sky_map(opts.input.name, moc=True)
uniq = skymap['UNIQ']
probdensity = skymap['PROBDENSITY']
level, ipix = ah.uniq_to_level_ipix(uniq)
area = ah.nside_to_pixel_area(
ah.level_to_nside(level)).to_value(u.steradian)
prob = probdensity * area
# Create MOC
contour_decimal = opts.contour / 100
moc = MOC.from_valued_healpix_cells(
uniq, prob, cumul_from=0.0, cumul_to=contour_decimal)
# Write MOC
moc.write(opts.output, format='fits', overwrite=True)
def _contour_more_detectors(self,
levels=[0.68],
colors=["green"],
ax=None,
**kwargs):
assert len(levels) == len(colors)
mocs = [
MOC.from_valued_healpix_cells(self._uniq, self._prob, cumul_to=c)
for c in levels
]
for moc, col in zip(mocs, colors[::-1]):
skycoords = moc.get_boundaries()
for sc in skycoords:
x, y = skycoord_to_pixel(sc, ax.wcs)
p = Path(np.vstack((x, y)).T)
patch = PathPatch(p, color=col, **kwargs)
ax.add_patch(patch)
probdensity=data['PROBDENSITY']
import astropy_healpix as ah
import astropy.units as u
level, ipix = ah.uniq_to_level_ipix(uniq)
area = ah.nside_to_pixel_area(ah.level_to_nside(level)).to_value(u.steradian)
prob = probdensity * area
from mocpy import MOC
import numpy as np
cumul_to = np.linspace(0.5, 0.9, 5)[::-1]
colors = ['blue', 'green', 'yellow', 'orange', 'red']
mocs = [MOC.from_valued_healpix_cells(uniq, prob, cumul_to=c) for c in cumul_to]
from mocpy import World2ScreenMPL
from astropy.coordinates import Angle, SkyCoord
import astropy.units as u
# Plot the MOC using matplotlib
import matplotlib.pyplot as plt
fig = plt.figure(111, figsize=(15, 10))
# Define a astropy WCS easily
with World2ScreenMPL(fig,
fov=50 * u.deg,
center=SkyCoord(315, 15, unit='deg', frame='icrs'),
coordsys="icrs",
rotation=Angle(0, u.degree),
projection="AIT") as wcs: