def test_pyregion_subset():
header = dict(naxis=2, crpix1=15, crpix2=15, crval1=0.1, crval2=0.1,
cdelt1=-1. / 3600, cdelt2=1. / 3600., ctype1='GLON-CAR',
ctype2='GLAT-CAR')
mywcs = wcs.WCS(header)
# circle with radius 10" at 0.1, 0.1
shape = Shape('circle', (0.1, 0.1, 10. / 3600.))
shape.coord_format = 'galactic'
shape.coord_list = (0.1, 0.1, 10. / 3600.)
shape.attr = ([], {})
data = np.ones([40, 40])
# The following line raises a DeprecationWarning from pyregion, ignore it
with warnings.catch_warnings():
warnings.filterwarnings('ignore')
(xlo, xhi, ylo, yhi), d = utils.pyregion_subset(shape, data, mywcs)
# sticky note over check-engine light solution... but this problem is too
# large in scope to address here. See
# https://github.com/astropy/astropy/pull/3992
assert d.sum() >= 313 & d.sum() <= 315 # VERY approximately pi
np.testing.assert_almost_equal(xlo,
data.shape[0] / 2 - mywcs.wcs.crpix[0] - 1)
np.testing.assert_almost_equal(xhi,
data.shape[0] - mywcs.wcs.crpix[0] - 1)
np.testing.assert_almost_equal(ylo,
data.shape[1] / 2 - mywcs.wcs.crpix[1] - 1)
np.testing.assert_almost_equal(yhi,
data.shape[1] - mywcs.wcs.crpix[1] - 1)
def footprint_to_reg(footprint):
"""
ALMA footprints have the form:
'Polygon ICRS 266.519781 -28.724666 266.524678 -28.731930 266.536683
-28.737784 266.543860 -28.737586 266.549277 -28.733370 266.558133
-28.729545 266.560136 -28.724666 266.558845 -28.719605 266.560133
-28.694332 266.555234 -28.687069 266.543232 -28.681216 266.536058
-28.681414 266.530644 -28.685630 266.521788 -28.689453 266.519784
-28.694332 266.521332 -28.699778'
Some of them have *additional* polygons
"""
if footprint[:7] != 'Polygon':
raise ValueError("Unrecognized footprint type")
from pyregion.parser_helper import Shape
entries = footprint.split()
polygons = [ii for ii, xx in enumerate(entries) if xx == 'Polygon']
reglist = []
for start, stop in zip(polygons, polygons[1:]+[None]):
reg = Shape('polygon', [float(x) for x in entries[start+2:stop]])
reg.coord_format = footprint.split()[1].lower()
reg.coord_list = reg.params # the coord_list attribute is needed somewhere
reg.attr = ([], {'color': 'green', 'dash': '0 ', 'dashlist': '8 3',
'delete': '1 ', 'edit': '1 ', 'fixed': '0 ', 'font':
'"helvetica 10 normal roman"', 'highlite': '1 ',
'include': '1 ', 'move': '1 ', 'select': '1',
'source': '1', 'text': '', 'width': '1 '})
reglist.append(reg)
return reglist
def footprint_to_reg(footprint):
"""
ALMA footprints have the form:
'Polygon ICRS 266.519781 -28.724666 266.524678 -28.731930 266.536683
-28.737784 266.543860 -28.737586 266.549277 -28.733370 266.558133
-28.729545 266.560136 -28.724666 266.558845 -28.719605 266.560133
-28.694332 266.555234 -28.687069 266.543232 -28.681216 266.536058
-28.681414 266.530644 -28.685630 266.521788 -28.689453 266.519784
-28.694332 266.521332 -28.699778'
Some of them have *additional* polygons
"""
if footprint[:7] != 'Polygon':
raise ValueError("Unrecognized footprint type")
from pyregion.parser_helper import Shape
entries = footprint.split()
polygons = [ii for ii, xx in enumerate(entries) if xx == 'Polygon']
reglist = []
for start, stop in zip(polygons, polygons[1:]+[None]):
reg = Shape('polygon', [float(x) for x in entries[start+2:stop]])
reg.coord_format = footprint.split()[1].lower()
reg.coord_list = reg.params # the coord_list attribute is needed somewhere
reg.attr = ([], {'color': 'green', 'dash': '0 ', 'dashlist': '8 3',
'delete': '1 ', 'edit': '1 ', 'fixed': '0 ', 'font':
'"helvetica 10 normal roman"', 'highlite': '1 ',
'include': '1 ', 'move': '1 ', 'select': '1',
'source': '1', 'text': '', 'width': '1 '})
reglist.append(reg)
return reglist
def test_pyregion_subset():
header = dict(naxis=2,
crpix1=15,
crpix2=15,
crval1=0.1,
crval2=0.1,
cdelt1=-1. / 3600,
cdelt2=1. / 3600.,
ctype1='GLON-CAR',
ctype2='GLAT-CAR')
mywcs = wcs.WCS(header)
# circle with radius 10" at 0.1, 0.1
shape = Shape('circle', (0.1, 0.1, 10. / 3600.))
shape.coord_format = 'galactic'
shape.coord_list = (0.1, 0.1, 10. / 3600.)
shape.attr = ([], {})
data = np.ones([40, 40])
(xlo, xhi, ylo, yhi), d = utils.pyregion_subset(shape, data, mywcs)
assert d.sum() == 314 # approximately pi
np.testing.assert_almost_equal(xlo,
data.shape[0] / 2 - mywcs.wcs.crpix[0] - 1)
np.testing.assert_almost_equal(xhi, data.shape[0] - mywcs.wcs.crpix[0] - 1)
np.testing.assert_almost_equal(ylo,
data.shape[1] / 2 - mywcs.wcs.crpix[1] - 1)
np.testing.assert_almost_equal(yhi, data.shape[1] - mywcs.wcs.crpix[1] - 1)
def test_pyregion_subset():
header = dict(naxis=2,
crpix1=15,
crpix2=15,
crval1=0.1,
crval2=0.1,
cdelt1=-1. / 3600,
cdelt2=1. / 3600.,
ctype1='GLON-CAR',
ctype2='GLAT-CAR')
mywcs = wcs.WCS(header)
# circle with radius 10" at 0.1, 0.1
shape = Shape('circle', (0.1, 0.1, 10. / 3600.))
shape.coord_format = 'galactic'
shape.coord_list = (0.1, 0.1, 10. / 3600.)
shape.attr = ([], {})
data = np.ones([40, 40])
(xlo, xhi, ylo, yhi), d = utils.pyregion_subset(shape, data, mywcs)
# sticky note over check-engine light solution... but this problem is too
# large in scope to address here. See
# https://github.com/astropy/astropy/pull/3992
assert d.sum() >= 313 & d.sum() <= 315 # VERY approximately pi
np.testing.assert_almost_equal(xlo,
data.shape[0] / 2 - mywcs.wcs.crpix[0] - 1)
np.testing.assert_almost_equal(xhi, data.shape[0] - mywcs.wcs.crpix[0] - 1)
np.testing.assert_almost_equal(ylo,
data.shape[1] / 2 - mywcs.wcs.crpix[1] - 1)
np.testing.assert_almost_equal(yhi, data.shape[1] - mywcs.wcs.crpix[1] - 1)
def table_to_circ_region(table,
outfile,
racol='RA',
deccol='DEC',
sizecol='size',
color='red',
label=True):
"""
Get a table with ra, dec, size and generate a circular ds9 region
TODO: if cat is given, add a small circle around all sources on the edge
"""
regions = []
for i, r in enumerate(table):
s = Shape('circle', None)
s.coord_format = 'fk5'
s.coord_list = [r[racol], r[deccol], r[sizecol]] # ra, dec, radius
s.coord_format = 'fk5'
s.attr = ([], {
'width': '2',
'point': 'cross',
'font': '"helvetica 16 normal roman"'
})
if label: s.comment = 'color={} text="{}"'.format(color, str(i))
else: s.comment = 'color={}'.format(color)
regions.append(s)
regions = pyregion.ShapeList(regions)
check_rm(outfile)
regions.write(outfile)
def makeBeamReg(self, outfile, pb_cut=None, to_null=False, freq='mid'):
"""
Create a ds9 region of the beam
outfile : str
output file
pb_cut : float, optional
diameter of the beam
to_null : bool, optional
arrive to the first null, not the FWHM
freq: min,max,med
which frequency to use to estimate the beam size
"""
logger.debug('Making PB region: '+outfile)
ra, dec = self.getPhaseCentre()
if pb_cut is None:
radius = self.getFWHM(freq=freq)/2.
else:
radius = pb_cut/2.
if to_null: radius *= 2 # rough estimation
s = Shape('circle', None)
s.coord_format = 'fk5'
s.coord_list = [ ra, dec, radius ] # ra, dec, radius
s.coord_format = 'fk5'
s.attr = ([], {'width': '2', 'point': 'cross',
'font': '"helvetica 16 normal roman"'})
s.comment = 'color=red text="beam"'
regions = pyregion.ShapeList([s])
lib_util.check_rm(outfile)
regions.write(outfile)
def test_pyregion_subset():
header = dict(naxis=2, crpix1=15, crpix2=15, crval1=0.1, crval2=0.1,
cdelt1=-1./3600, cdelt2=1./3600., ctype1='GLON-CAR',
ctype2='GLAT-CAR')
mywcs = wcs.WCS(header)
# circle with radius 10" at 0.1, 0.1
shape = Shape('circle', (0.1, 0.1, 10./3600.))
shape.coord_format = 'galactic'
shape.coord_list = (0.1, 0.1, 10./3600.)
shape.attr = ([], {})
data = np.ones([40,40])
(xlo,xhi,ylo,yhi), d = utils.pyregion_subset(shape, data, mywcs)
assert d.sum() == 314 # approximately pi
np.testing.assert_almost_equal(xlo, data.shape[0]/2-mywcs.wcs.crpix[0]-1)
np.testing.assert_almost_equal(xhi, data.shape[0]-mywcs.wcs.crpix[0]-1)
np.testing.assert_almost_equal(ylo, data.shape[1]/2-mywcs.wcs.crpix[1]-1)
np.testing.assert_almost_equal(yhi, data.shape[1]-mywcs.wcs.crpix[1]-1)
def set_region(self, loc):
"""
Creates a ds9 regionfile that covers the DD-cal model
"""
assert self.size is not None and self.position is not None # we need this to be already set
self.region_file = loc+'/'+self.name+'.reg'
s = Shape('circle', None)
s.coord_format = 'fk5'
s.coord_list = [ self.position[0], self.position[1], self.size/2. ] # ra, dec, radius
s.coord_format = 'fk5'
s.attr = ([], {'width': '2', 'point': 'cross',
'font': '"helvetica 16 normal roman"'})
if not self.peel_off: s.comment = 'color=red text="%s"' % self.name
else: s.comment = 'color=blue text="%s"' % self.name
regions = pyregion.ShapeList([s])
lib_util.check_rm(self.region_file)
regions.write(self.region_file)
def makeBeamReg(self, outfile, pb_cut=None, to_null=False):
"""
Create a ds9 region of the beam
outfile : str
output file
pb_cut : float, optional
diameter of the beam
to_null : bool, optional
arrive to the first null, not the FWHM
"""
logger.debug('Making PB region: ' + outfile)
ra, dec = self.getPhaseCentre()
if pb_cut is None:
if 'OUTER' in self.getObsMode():
size = 8. / 2.
elif 'SPARSE' in self.getObsMode():
size = 12. / 2.
elif 'INNER' in self.getObsMode():
size = 16. / 2.
else:
logger.error(
'Cannot find beam size, only LBA_OUTER or LBA_SPARSE_* are implemented. Assuming beam diameter = 8 deg.'
)
size = 8. / 2.
else:
size = pb_cut / 2.
if to_null: size *= 1.7 # rough estimation
s = Shape('circle', None)
s.coord_format = 'fk5'
s.coord_list = [ra, dec, size] # ra, dec, radius
s.coord_format = 'fk5'
s.attr = ([], {
'width': '2',
'point': 'cross',
'font': '"helvetica 16 normal roman"'
})
s.comment = 'color=red text="beam"'
regions = pyregion.ShapeList([s])
lib_util.check_rm(outfile)
regions.write(outfile)
def make_voronoi_reg(directions,
fitsfile,
outdir_reg='regions',
out_mask='facet.fits',
beam_reg=None,
png=None):
"""
Take a list of coordinates and an image and voronoi tesselate the sky.
It saves ds9 regions + fits mask of the facets
directions : dict with {'Dir_0':[ra,dec], 'Dir_1':[ra,dec]...} - note that the "Dir_##" naming is important
firsfile : mask fits file to tassellate (used for coordinates and to avoid splitting islands)
outdir* : dir where to save regions/masks
beam_reg : a ds9 region showing the the primary beam, exclude directions outside it
"""
def closest_node(node, nodes):
"""
Return closest values to node from nodes
"""
nodes = np.asarray(nodes)
dist_2 = np.sum((nodes - node)**2, axis=1)
return np.argmin(dist_2)
import lib_img
logger.debug("Image used for tasselation reference: " + fitsfile)
fits = pyfits.open(fitsfile)
hdr, data = lib_img.flatten(fits)
w = pywcs.WCS(hdr)
pixsize = np.abs(hdr['CDELT1'])
# Get facets central pixels
ras = np.array([directions[d][0].degree for d in directions])
decs = np.array([directions[d][1].degree for d in directions])
x_fs, y_fs = w.all_world2pix(ras, decs, 0, ra_dec_order=True)
# keep trak of numbers in the direction names to name correctly patches in the fits files
# in this way Dir_12 will have "12" into the fits for that patch.
nums = [int(d.split('_')[1]) for d in directions.keys()]
x_c = data.shape[0] / 2.
y_c = data.shape[1] / 2.
if beam_reg is None:
# no beam, use all directions for facets
idx_for_facet = range(len(directions))
else:
r = pyregion.open(beam_reg)
beam_mask = r.get_mask(header=hdr, shape=data.shape)
beamradius_pix = r[0].coord_list[2] / pixsize
idx_for_facet = []
for i, dd in enumerate(t):
if beam_mask[t['x'][i], t['y'][i]] == True:
idx_for_facet.append(i)
# convert to pixel space (voronoi must be in eucledian space)
x1 = 0
y1 = 0
x2 = data.shape[0]
y2 = data.shape[1]
# do tasselization
vor = Voronoi(
np.array((x_fs[idx_for_facet], y_fs[idx_for_facet])).transpose())
box = np.array([[x1, y1], [x2, y2]])
impoly = voronoi_finite_polygons_2d_box(vor, box)
# create fits mask (each region one number)
x, y = np.meshgrid(np.arange(x2),
np.arange(y2)) # make a canvas with coordinates
x, y = x.flatten(), y.flatten()
pixels = np.vstack((x, y)).T
data_facet = np.zeros(shape=data.shape)
for num, poly in zip(nums, impoly):
p = Path(poly)
pixels_region = p.contains_points(pixels)
# iterate through direction centres and find which one belongs to this region, then use the dir name to set the number
# this is important as the vornoi tassellation has to have the same names of the original tassellation
#for x,y,d in zip(x_fs, y_fs, directions.keys()):
# if pixels_region.reshape(x2,y2)[int(np.rint(x)),int(np.rint(y))] == True:
# num = int(d.split('_')[1])
# print num,x,y,d
data_facet[pixels_region.reshape(x2, y2)] = num
# put all values in each island equal to the closest region
struct = generate_binary_structure(2, 2)
data = binary_dilation(data, structure=struct,
iterations=3).astype(data.dtype) # expand masks
blobs, number_of_blobs = label(data.astype(int).squeeze(),
structure=[[1, 1, 1], [1, 1, 1], [1, 1, 1]])
center_of_masses = center_of_mass(data, blobs, range(number_of_blobs + 1))
for blob in xrange(1, number_of_blobs + 1):
# get closer facet
facet_num = closest_node(center_of_masses[blob],
np.array([y_fs, x_fs]).T)
# put all pixel of that mask to that facet value
data_facet[blobs == blob] = nums[facet_num]
# save fits mask
pyfits.writeto(out_mask, data_facet, hdr, overwrite=True)
# save regions
all_s = []
for i, poly in enumerate(impoly):
ra, dec = w.all_pix2world(poly[:, 0], poly[:, 1], 0, ra_dec_order=True)
coords = np.array([ra, dec]).T.flatten()
s = Shape('Polygon', None)
s.coord_format = 'fk5'
s.coord_list = coords # ra, dec, radius
s.coord_format = 'fk5'
s.attr = ([], {
'width': '2',
'point': 'cross',
'font': '"helvetica 16 normal roman"'
})
s.comment = 'color=red'
all_s.append(s)
regions = pyregion.ShapeList([s])
regionfile = outdir_reg + '/' + directions.keys()[
idx_for_facet[i]] + '.reg'
regions.write(regionfile)
# add names for all.reg
for d_name, d_coord in directions.iteritems():
s = Shape('circle', None)
s.coord_format = 'fk5'
s.coord_list = [d_coord[0].degree, d_coord[1].degree,
0.01] # ra, dec, radius
s.coord_format = 'fk5'
s.attr = ([], {
'width': '1',
'point': 'cross',
'font': '"helvetica 16 normal roman"'
})
s.comment = 'color=white text="%s"' % d_name
all_s.append(s)
regions = pyregion.ShapeList(all_s)
regionfile = outdir_reg + '/all.reg'
regions.write(regionfile)
logger.debug(
'There are %i regions within the PB and %i outside (no facet).' %
(len(idx_for_facet), len(directions) - len(idx_for_facet)))
# plot tesselization
if png is not None:
import matplotlib.pyplot as pl
pl.figure(figsize=(8, 8))
ax1 = pl.gca()
voronoi_plot_2d(vor,
ax1,
show_vertices=True,
line_colors='black',
line_width=2,
point_size=4)
for i, d in enumerate(directions):
ax1.text(x_fs[i], y_fs[i], d, fontsize=15)
if not beam_reg is None:
c1 = pl.Circle((x_c, y_c), beamradius_pix, color='g', fill=False)
ax1.add_artist(c1)
ax1.plot([x1, x1, x2, x2, x1], [y1, y2, y2, y1, y1])
ax1.set_xlabel('RA (pixel)')
ax1.set_ylabel('Dec (pixel)')
ax1.set_xlim(x1, x2)
ax1.set_ylim(y1, y2)
logger.debug('Save plot: %s' % png)
pl.savefig(png)
def make_finder_chart_from_image_and_catalog(
image,
catalog,
save_prefix,
alma_kwargs={
'public': False,
'science': False
},
bands=(3, 4, 5, 6, 7, 8, 9),
private_band_colors=('maroon', 'red', 'orange', 'coral', 'brown', 'yellow',
'mediumorchid'),
public_band_colors=('blue', 'cyan', 'green', 'turquoise', 'teal',
'darkslategrey', 'chartreuse'),
integration_time_contour_levels=np.logspace(0, 5, base=2, num=6),
save_masks=False,
use_saved_masks=False,
):
"""
Create a "finder chart" showing where ALMA has pointed in various bands,
including different color coding for public/private data and each band.
Contours are set at various integration times.
Parameters
----------
image : fits.PrimaryHDU or fits.ImageHDU object
The image to overlay onto
catalog : astropy.Table object
The catalog of ALMA observations
save_prefix : str
The prefix for the output files. Both .reg and .png files will be
written. The .reg files will have the band numbers and
public/private appended, while the .png file will be named
prefix_almafinderchart.png
alma_kwargs : dict
Keywords to pass to the ALMA archive when querying.
private_band_colors / public_band_colors : tuple
A tuple or list of colors to be associated with private/public
observations in the various bands
integration_time_contour_levels : list or np.array
The levels at which to draw contours in units of seconds. Default is
log-spaced (2^n) seconds: [ 1., 2., 4., 8., 16., 32.])
"""
import aplpy
import pyregion
from pyregion.parser_helper import Shape
primary_beam_radii = [
approximate_primary_beam_sizes(row['Frequency support'])
for row in catalog
]
all_bands = bands
bands = used_bands = np.unique(catalog['Band'])
log.info("The bands used include: {0}".format(used_bands))
band_colors_priv = dict(zip(all_bands, private_band_colors))
band_colors_pub = dict(zip(all_bands, public_band_colors))
log.info("Color map private: {0}".format(band_colors_priv))
log.info("Color map public: {0}".format(band_colors_pub))
if use_saved_masks:
hit_mask_public = {}
hit_mask_private = {}
for band in bands:
pubfile = '{0}_band{1}_public.fits'.format(save_prefix, band)
if os.path.exists(pubfile):
hit_mask_public[band] = fits.getdata(pubfile)
privfile = '{0}_band{1}_private.fits'.format(save_prefix, band)
if os.path.exists(privfile):
hit_mask_private[band] = fits.getdata(privfile)
else:
today = np.datetime64('today')
private_circle_parameters = {
band: [(row['RA'], row['Dec'], np.mean(rad).to(u.deg).value)
for row, rad in zip(catalog, primary_beam_radii)
if not row['Release date'] or (np.datetime64(
row['Release date']) > today and row['Band'] == band)]
for band in bands
}
public_circle_parameters = {
band: [(row['RA'], row['Dec'], np.mean(rad).to(u.deg).value)
for row, rad in zip(catalog, primary_beam_radii)
if row['Release date'] and (np.datetime64(
row['Release date']) <= today and row['Band'] == band)]
for band in bands
}
unique_private_circle_parameters = {
band: np.array(list(set(private_circle_parameters[band])))
for band in bands
}
unique_public_circle_parameters = {
band: np.array(list(set(public_circle_parameters[band])))
for band in bands
}
release_dates = np.array(catalog['Release date'], dtype=np.datetime64)
for band in bands:
log.info("BAND {0}".format(band))
privrows = sum((catalog['Band'] == band) & (release_dates > today))
pubrows = sum((catalog['Band'] == band) & (release_dates <= today))
log.info("PUBLIC: Number of rows: {0}. Unique pointings: "
"{1}".format(pubrows,
len(unique_public_circle_parameters[band])))
log.info("PRIVATE: Number of rows: {0}. Unique pointings: "
"{1}".format(privrows,
len(unique_private_circle_parameters[band])))
prv_regions = {
band: pyregion.ShapeList([
Shape('circle', [x, y, r])
for x, y, r in private_circle_parameters[band]
])
for band in bands
}
pub_regions = {
band: pyregion.ShapeList([
Shape('circle', [x, y, r])
for x, y, r in public_circle_parameters[band]
])
for band in bands
}
for band in bands:
circle_pars = np.vstack([
x for x in (private_circle_parameters[band],
public_circle_parameters[band]) if any(x)
])
for r, (x, y, c) in zip(prv_regions[band] + pub_regions[band],
circle_pars):
r.coord_format = 'fk5'
r.coord_list = [x, y, c]
r.attr = ([], {
'color': 'green',
'dash': '0 ',
'dashlist': '8 3',
'delete': '1 ',
'edit': '1 ',
'fixed': '0 ',
'font': '"helvetica 10 normal roman"',
'highlite': '1 ',
'include': '1 ',
'move': '1 ',
'select': '1',
'source': '1',
'text': '',
'width': '1 '
})
if prv_regions[band]:
prv_regions[band].write('{0}_band{1}_private.reg'.format(
save_prefix, band))
if pub_regions[band]:
pub_regions[band].write('{0}_band{1}_public.reg'.format(
save_prefix, band))
prv_mask = {
band:
fits.PrimaryHDU(prv_regions[band].get_mask(image).astype('int'),
header=image.header)
for band in bands if prv_regions[band]
}
pub_mask = {
band:
fits.PrimaryHDU(pub_regions[band].get_mask(image).astype('int'),
header=image.header)
for band in bands if pub_regions[band]
}
hit_mask_public = {
band: np.zeros_like(image.data)
for band in pub_mask
}
hit_mask_private = {
band: np.zeros_like(image.data)
for band in prv_mask
}
mywcs = wcs.WCS(image.header)
for band in bands:
log.debug('Band: {0}'.format(band))
for row, rad in ProgressBar(list(zip(catalog,
primary_beam_radii))):
shape = Shape(
'circle',
(row['RA'], row['Dec'], np.mean(rad).to(u.deg).value))
shape.coord_format = 'fk5'
shape.coord_list = (row['RA'], row['Dec'],
np.mean(rad).to(u.deg).value)
shape.attr = ([], {
'color': 'green',
'dash': '0 ',
'dashlist': '8 3 ',
'delete': '1 ',
'edit': '1 ',
'fixed': '0 ',
'font': '"helvetica 10 normal roman"',
'highlite': '1 ',
'include': '1 ',
'move': '1 ',
'select': '1 ',
'source': '1',
'text': '',
'width': '1 '
})
log.debug('{1} {2}: {0}'.format(shape, row['Release date'],
row['Band']))
if not row['Release date']:
reldate = False
else:
reldate = np.datetime64(row['Release date'])
if (((not reldate) or (reldate > today))
and (row['Band'] == band) and (band in prv_mask)):
# private: release_date = 'sometime' says when it will be released
(xlo, xhi, ylo,
yhi), mask = pyregion_subset(shape,
hit_mask_private[band],
mywcs)
log.debug("{0},{1},{2},{3}: {4}".format(
xlo, xhi, ylo, yhi, mask.sum()))
hit_mask_private[band][
ylo:yhi, xlo:xhi] += row['Integration'] * mask
elif (reldate and (reldate <= today) and (row['Band'] == band)
and (band in pub_mask)):
# public: release_date = '' should mean already released
(xlo, xhi, ylo,
yhi), mask = pyregion_subset(shape, hit_mask_public[band],
mywcs)
log.debug("{0},{1},{2},{3}: {4}".format(
xlo, xhi, ylo, yhi, mask.sum()))
hit_mask_public[band][ylo:yhi,
xlo:xhi] += row['Integration'] * mask
if save_masks:
for band in bands:
if band in hit_mask_public:
hdu = fits.PrimaryHDU(data=hit_mask_public[band],
header=image.header)
hdu.writeto('{0}_band{1}_public.fits'.format(
save_prefix, band),
clobber=True)
if band in hit_mask_private:
hdu = fits.PrimaryHDU(data=hit_mask_private[band],
header=image.header)
hdu.writeto('{0}_band{1}_private.fits'.format(
save_prefix, band),
clobber=True)
fig = aplpy.FITSFigure(fits.HDUList(image), convention='calabretta')
fig.show_grayscale(stretch='arcsinh')
for band in bands:
if band in hit_mask_public:
fig.show_contour(fits.PrimaryHDU(data=hit_mask_public[band],
header=image.header),
levels=integration_time_contour_levels,
colors=[band_colors_pub[int(band)]] *
len(integration_time_contour_levels),
convention='calabretta')
if band in hit_mask_private:
fig.show_contour(fits.PrimaryHDU(data=hit_mask_private[band],
header=image.header),
levels=integration_time_contour_levels,
colors=[band_colors_priv[int(band)]] *
len(integration_time_contour_levels),
convention='calabretta')
fig.save('{0}_almafinderchart.png'.format(save_prefix))
return image, catalog, hit_mask_public, hit_mask_private
def writeRegionFile(outname, catalog, matches, color='blue', width=2,
fonttype='helvetica', fontsize=10, fontweight='normal',
fontfamily='roman'):
'''
Writes the region file.
Keywords:
outname -- A string containing the name of the output file.
gParam -- A dictionary of global setup parameters.
catalog -- A dictionary containing the different region.
matches -- A list containing the indices matching the search keyword(s).
'''
fontpars = dict(fontweight=fontweight, fonttype=fonttype,
fontfamily=fontfamily, fontsize=fontsize)
shapeList = []
for row in matches:
name = row['name']
stype = row['stype']
coords = row['coord']
epoch = row['epoch']
shape = row['shape']
sunit = row['sunit']
text = row['text']
#
# do some coordinate system conversion, if necessary
if 'equatorial' in row['ctype']:
if epoch == 1950:
frame = coord.FK4
pos = coord.SkyCoord(coords, frame=frame, unit=(u.hourangle, u.deg))
pos_fk5 = pos.fk5
elif epoch == 2000:
frame = coord.FK5
pos_fk5 = coord.SkyCoord(coords, frame=frame, unit=(u.hourangle, u.deg))
else:
print("Cannot read epoch and/or ctype. Skipping index %i" % index)
continue
if 'ellipse' in stype:
shape_list = shape.split(',')
rmaj = u.Quantity(float(shape_list[0].strip()), sunit)
rmin = u.Quantity(float(shape_list[1].strip()), sunit)
rpa = shape_list[2].strip()
shape = Shape(stype,
(pyregion.region_numbers.SimpleNumber(pos_fk5.ra.deg),
pyregion.region_numbers.SimpleNumber(pos_fk5.dec.deg),
pyregion.region_numbers.AngularDistance('{0}"'.format(rmaj.to(u.arcsec).value)),
pyregion.region_numbers.AngularDistance('{0}"'.format(rmin.to(u.arcsec).value)),
pyregion.region_numbers.AngularDistance(rpa),))
shape.coord_format = 'fk5'
shape.attr = ([],{})
shape.attr[1].update({'color': color,
'text': "{0}{2}{1}".format(name,text, ", " if text else ""),
'width': str(width),
'font': "{fonttype} {fontsize} {fontweight} {fontfamily}".format(**fontpars),
})
shape.coord_list = [pos_fk5.ra.deg, pos_fk5.dec.deg,
rmaj.to(u.deg).value, rmin.to(u.deg).value,
float(rpa)]
shape.comment = "text={{{text}}}".format(**shape.attr[1])
print(shape, shape.attr)
shapeList.append(shape)
SL = pyregion.ShapeList(shapeList)
SL.write(outname)
return SL
fig = aplpy.FITSFigure(m83_images[0])
fig.show_grayscale(stretch='arcsinh', vmid=0.1)
fig.show_circles(unique_public_circle_parameters[:, 0],
unique_public_circle_parameters[:, 1],
unique_public_circle_parameters[:, 2],
color='b',
alpha=0.2)
# Use pyregion to write the observed regions to disk. Pyregion has a very
# awkward API; there is (in principle) work in progress to improve that
# situation but for now one must do all this extra work.
import pyregion
from pyregion.parser_helper import Shape
prv_regions = pyregion.ShapeList(
[Shape('circle', [x, y, r]) for x, y, r in private_circle_parameters])
pub_regions = pyregion.ShapeList(
[Shape('circle', [x, y, r]) for x, y, r in public_circle_parameters])
for r, (x, y, c) in zip(
prv_regions + pub_regions,
np.vstack([private_circle_parameters, public_circle_parameters])):
r.coord_format = 'fk5'
r.coord_list = [x, y, c]
r.attr = ([], {
'color': 'green',
'dash': '0 ',
'dashlist': '8 3 ',
'delete': '1 ',
'edit': '1 ',
'fixed': '0 ',
'font': '"helvetica 10 normal roman"',
def make_voronoi_reg(directions,
fitsfile,
outdir='regions/',
beam_reg='',
png=None):
"""
Take a list of coordinates and an image and voronoi tesselate the sky.
It saves ds9 regions of the facets and and return facet sizes
directions : dict with {'dir0':[ra,dec], 'dir1':[ra,dec]...}
firsfile : model fits file to tassellate (used for coordinates)
outdir : dir where to save regions
beam_reg : a ds9 region showing the the primary beam, exclude directions outside it
"""
logger.debug("Image used for tasselation reference: " + fitsfile)
fits = pyfits.open(fitsfile)
hdr, data = flatten(fits)
w = pywcs.WCS(hdr)
pixsize = np.abs(hdr['CDELT1'])
# Add facet size column
ras = np.array([directions[d][0].degree for d in directions])
decs = np.array([directions[d][1].degree for d in directions])
x, y = w.all_world2pix(ras, decs, 0, ra_dec_order=True)
x_c = data.shape[0] / 2.
y_c = data.shape[1] / 2.
if beam_reg == '':
# no beam, use all directions for facets
idx_for_facet = range(len(directions))
else:
r = pyregion.open(beam_reg)
beam_mask = r.get_mask(header=hdr, shape=data.shape)
beamradius_pix = r[0].coord_list[2] / pixsize
idx_for_facet = []
for i, dd in enumerate(t):
if beam_mask[t['x'][i], t['y'][i]] == True:
idx_for_facet.append(i)
# convert to pixel space (voronoi must be in eucledian space)
x1 = 0
y1 = 0
x2 = data.shape[0]
y2 = data.shape[1]
# do tasselization
vor = Voronoi(np.array((x[idx_for_facet], y[idx_for_facet])).transpose())
box = np.array([[x1, y1], [x2, y2]])
impoly = voronoi_finite_polygons_2d_box(vor, box)
# save regions
all_s = []
for i, poly in enumerate(impoly):
ra, dec = w.all_pix2world(poly[:, 0], poly[:, 1], 0, ra_dec_order=True)
coords = np.array([ra, dec]).T.flatten()
s = Shape('Polygon', None)
s.coord_format = 'fk5'
s.coord_list = coords # ra, dec, radius
s.coord_format = 'fk5'
s.attr = ([], {
'width': '2',
'point': 'cross',
'font': '"helvetica 16 normal roman"'
})
s.comment = 'color=red'
all_s.append(s)
regions = pyregion.ShapeList([s])
regionfile = outdir + directions.keys()[idx_for_facet[i]] + '.reg'
regions.write(regionfile)
#if beam_reg != '': npix = size_from_reg(fitsfile, [regionfile, beam_reg], [ras[idx_for_facet[i]], decs[idx_for_facet[i]]])
#else: npix = size_from_reg(fitsfile, [regionfile], [ras[idx_for_facet[i]], decs[idx_for_facet[i]]])
# add names for all.reg
for d_name, d_coord in directions.iteritems():
s = Shape('circle', None)
s.coord_format = 'fk5'
s.coord_list = [d_coord[0].degree, d_coord[1].degree,
0.01] # ra, dec, radius
s.coord_format = 'fk5'
s.attr = ([], {
'width': '1',
'point': 'cross',
'font': '"helvetica 16 normal roman"'
})
s.comment = 'color=white text="%s"' % d_name
all_s.append(s)
regions = pyregion.ShapeList(all_s)
regionfile = outdir + 'all.reg'
regions.write(regionfile)
logger.debug(
'There are %i calibrator within the PB and %i outside (no facet).' %
(len(idx_for_facet), len(directions) - len(idx_for_facet)))
# plot tesselization
if png is not None:
import matplotlib.pyplot as pl
pl.figure(figsize=(8, 8))
ax1 = pl.gca()
ax1.plot(x, y, '*', color='red')
for i, d in enumerate(directions):
ax1.text(x[i], y[i], d, fontsize=15)
if beam_reg != '':
c1 = pl.Circle((x_c, y_c), beamradius_pix, color='g', fill=False)
ax1.add_artist(c1)
ax1.plot([x1, x1, x2, x2, x1], [y1, y2, y2, y1, y1])
for p in impoly:
pp = p.transpose()
ax1.plot(pp[0], pp[1])
ax1.set_xlabel('RA (pixel)')
ax1.set_ylabel('Dec (pixel)')
logger.debug('Save plot: %s' % png)
pl.savefig(png)
xhi=xhi,
yhi=yhi))
subwcs = mywcs[ylo:yhi, xlo:xhi]
subhdr = subwcs.sub([wcs.WCSSUB_CELESTIAL]).to_header()
subdata = data[ylo:yhi, xlo:xhi]
mask = shapelist.get_mask(header=subhdr,
shape=subdata.shape)
log.debug("Shapes: data={0}, subdata={2}, mask={1}".format(data.shape, mask.shape, subdata.shape))
return (xlo, xhi, ylo, yhi), mask
for row, rad in zip(m83, primary_beam_radii):
shape = Shape('circle', (row['RA'], row['Dec'], np.mean(rad).to(u.deg).value))
shape.coord_format = 'fk5'
shape.coord_list = (row['RA'], row['Dec'], np.mean(rad).to(u.deg).value)
shape.attr = ([], {'color': 'green', 'dash': '0 ', 'dashlist': '8 3 ',
'delete': '1 ', 'edit': '1 ', 'fixed': '0 ',
'font': '"helvetica 10 normal roman"', 'highlite': '1 ',
'include': '1 ', 'move': '1 ', 'select': '1 ',
'source': '1', 'text': '', 'width': '1 '})
if row['Release date']==b'' and row['Band']==3:
(xlo, xhi, ylo, yhi), mask = pyregion_subset(shape, hit_mask_band3_private, mywcs)
hit_mask_band3_private[ylo:yhi, xlo:xhi] += row['Integration']*mask
elif row['Release date'] and row['Band']==3:
(xlo, xhi, ylo, yhi), mask = pyregion_subset(shape, hit_mask_band3_public, mywcs)
hit_mask_band3_public[ylo:yhi, xlo:xhi] += row['Integration']*mask
elif row['Release date'] and row['Band']==6:
(xlo, xhi, ylo, yhi), mask = pyregion_subset(shape, hit_mask_band6_public, mywcs)
def make_finder_chart(target, radius, save_prefix, service=SkyView.get_images,
service_kwargs={'survey': ['2MASS-K'], 'pixels': 500},
alma_kwargs={'public': False, 'science': False},
private_band_colors=('red', 'darkred', 'orange',
'brown', 'maroon'),
public_band_colors=('blue', 'cyan', 'green',
'turquoise', 'teal'),
integration_time_contour_levels=np.logspace(0, 5, base=2,
num=6),
):
"""
Create a "finder chart" showing where ALMA has pointed in various bands,
including different color coding for public/private data and each band.
Contours are set at various integration times.
Parameters
----------
target : `astropy.coordinates` or str
A legitimate target name
radius : `astropy.units.Quantity`
A degree-equivalent radius
save_prefix : str
The prefix for the output files. Both .reg and .png files will be
written. The .reg files will have the band numbers and
public/private appended, while the .png file will be named
prefix_almafinderchart.png
service : function
The `get_images` function of an astroquery service, e.g. SkyView.
service_kwargs : dict
The keyword arguments to pass to the specified service. For example,
for SkyView, you can give it the survey ID (e.g., 2MASS-K) and the
number of pixels in the resulting image. See the documentation for the
individual services for more details.
alma_kwargs : dict
Keywords to pass to the ALMA archive when querying.
private_band_colors / public_band_colors : tuple
A tuple or list of colors to be associated with private/public
observations in the various bands
integration_time_contour_levels : list or np.array
The levels at which to draw contours in units of seconds. Default is
log-spaced (2^n) seconds: [ 1., 2., 4., 8., 16., 32.])
"""
import aplpy
import pyregion
from pyregion.parser_helper import Shape
log.info("Querying {0} for images".format(service))
images = service(target, radius=radius, **service_kwargs)
log.info("Querying ALMA around {0}".format(target))
catalog = Alma.query_region(coordinate=target, radius=radius,
**alma_kwargs)
primary_beam_radii = [
approximate_primary_beam_sizes(row['Frequency support'])
for row in catalog]
bands = np.unique(catalog['Band'])
log.info("The bands used include: {0}".format(bands))
band_colors_priv = dict(zip(bands, private_band_colors))
band_colors_pub = dict(zip(bands, public_band_colors))
private_circle_parameters = {
band: [(row['RA'], row['Dec'], np.mean(rad).to(u.deg).value)
for row, rad in zip(catalog, primary_beam_radii)
if row['Release date'] != '' and row['Band'] == band]
for band in bands}
public_circle_parameters = {
band: [(row['RA'], row['Dec'], np.mean(rad).to(u.deg).value)
for row, rad in zip(catalog, primary_beam_radii)
if row['Release date'] == '' and row['Band'] == band]
for band in bands}
unique_private_circle_parameters = {
band: np.array(list(set(private_circle_parameters[band])))
for band in bands}
unique_public_circle_parameters = {
band: np.array(list(set(public_circle_parameters[band])))
for band in bands}
for band in bands:
log.info("BAND {0}".format(band))
privrows = sum((catalog['Band'] == band) &
(catalog['Release date'] != ''))
pubrows = sum((catalog['Band'] == band) &
(catalog['Release date'] == ''))
log.info("PUBLIC: Number of rows: {0}. Unique pointings: "
"{1}".format(pubrows,
len(unique_public_circle_parameters[band])))
log.info("PRIVATE: Number of rows: {0}. Unique pointings: "
"{1}".format(privrows,
len(unique_private_circle_parameters[band])))
prv_regions = {
band: pyregion.ShapeList([Shape('circle', [x, y, r]) for x, y, r
in private_circle_parameters[band]])
for band in bands}
pub_regions = {
band: pyregion.ShapeList([Shape('circle', [x, y, r]) for x, y, r
in public_circle_parameters[band]])
for band in bands}
for band in bands:
circle_pars = np.vstack(
[x for x in (private_circle_parameters[band],
public_circle_parameters[band]) if any(x)])
for r, (x, y, c) in zip(prv_regions[band] + pub_regions[band],
circle_pars):
r.coord_format = 'fk5'
r.coord_list = [x, y, c]
r.attr = ([], {'color': 'green', 'dash': '0 ', 'dashlist': '8 3',
'delete': '1 ', 'edit': '1 ', 'fixed': '0 ',
'font': '"helvetica 10 normal roman"', 'highlite':
'1 ', 'include': '1 ', 'move': '1 ', 'select': '1',
'source': '1', 'text': '', 'width': '1 '})
if prv_regions[band]:
prv_regions[band].write(
'{0}_band{1}_private.reg'.format(save_prefix, band))
if pub_regions[band]:
pub_regions[band].write(
'{0}_band{1}_public.reg'.format(save_prefix, band))
prv_mask = {
band: fits.PrimaryHDU(
prv_regions[band].get_mask(images[0][0]).astype('int'),
header=images[0][0].header) for band in bands if prv_regions[band]}
pub_mask = {
band: fits.PrimaryHDU(
pub_regions[band].get_mask(images[0][0]).astype('int'),
header=images[0][0].header) for band in bands if pub_regions[band]}
hit_mask_public = {band: np.zeros_like(images[0][0].data)
for band in pub_mask}
hit_mask_private = {band: np.zeros_like(images[0][0].data)
for band in prv_mask}
mywcs = wcs.WCS(images[0][0].header)
for band in bands:
log.debug('Band: {0}'.format(band))
for row, rad in zip(catalog, primary_beam_radii):
shape = Shape('circle', (row['RA'], row['Dec'],
np.mean(rad).to(u.deg).value))
shape.coord_format = 'fk5'
shape.coord_list = (row['RA'], row['Dec'],
np.mean(rad).to(u.deg).value)
shape.attr = ([], {'color': 'green', 'dash': '0 ',
'dashlist': '8 3 ',
'delete': '1 ', 'edit': '1 ', 'fixed': '0 ',
'font': '"helvetica 10 normal roman"',
'highlite': '1 ', 'include': '1 ', 'move': '1 ',
'select': '1 ', 'source': '1', 'text': '',
'width': '1 '})
log.debug('{1} {2}: {0}'
.format(shape, row['Release date'], row['Band']))
if (row['Release date'] != '' and row['Band'] == band and
band in prv_mask):
(xlo, xhi, ylo, yhi), mask = pyregion_subset(
shape, hit_mask_private[band], mywcs)
log.debug("{0},{1},{2},{3}: {4}"
.format(xlo, xhi, ylo, yhi, mask.sum()))
hit_mask_private[band][ylo:yhi, xlo:xhi] += row['Integration']*mask
if (row['Release date'] == '' and row['Band'] == band and
band in pub_mask):
(xlo, xhi, ylo, yhi), mask = pyregion_subset(
shape, hit_mask_public[band], mywcs)
log.debug("{0},{1},{2},{3}: {4}"
.format(xlo, xhi, ylo, yhi, mask.sum()))
hit_mask_public[band][ylo:yhi, xlo:xhi] += row['Integration']*mask
fig = aplpy.FITSFigure(images[0])
fig.show_grayscale(stretch='arcsinh')
for band in bands:
if band in pub_mask:
fig.show_contour(fits.PrimaryHDU(data=hit_mask_public[band],
header=images[0][0].header),
levels=integration_time_contour_levels,
colors=[band_colors_pub[band]] * 6)
if band in prv_mask:
fig.show_contour(fits.PrimaryHDU(data=hit_mask_private[band],
header=images[0][0].header),
levels=integration_time_contour_levels,
colors=[band_colors_priv[band]] * 6)
fig.save('{0}_almafinderchart.png'.format(save_prefix))
return images, catalog, hit_mask_public, hit_mask_private
dist = lib_util.distanceOnSphere(phasecentre[0], phasecentre[1],
peelsou['RA'], peelsou['DEC'])
if dist < 0.5:
continue
logger.info('Peeling %s (%.1f Jy)' % (name, peelsou['Total_flux']))
with w.if_todo('peel-%s' % name):
lib_util.check_rm('peel-%s' % name)
os.system('mkdir peel-%s' % name)
# make a region
from pyregion.parser_helper import Shape
import pyregion
peel_region_file = 'peel-' + name + '/' + name + '.reg'
sh = Shape('circle', None)
sh.coord_format = 'fk5'
sh.coord_list = [peelsou['RA'], peelsou['DEC'],
0.1] # ra, dec, diam
sh.coord_format = 'fk5'
sh.attr = ([], {
'width': '2',
'point': 'cross',
'font': '"helvetica 16 normal roman"'
})
sh.comment = 'color=red text="%s"' % (name + '.reg')
regions = pyregion.ShapeList([sh])
lib_util.check_rm(peel_region_file)
regions.write(peel_region_file)
# copy and blank models
def make_voronoi_reg(directions,
fitsfile,
outdir_reg='regions',
out_mask='facet.fits',
png=None):
"""
Take a list of coordinates and an image and voronoi tesselate the sky.
It saves ds9 regions + fits mask of the facets
directions : array of Direction objects
firsfile : mask fits file to tassellate (used for coordinates and as template for the out_mask)
outdir_reg : dir where to save regions
out_mask : output mask with different numbers in each facet
png : output png file that shows the tassellation
"""
def closest_node(node, nodes):
"""
Return closest values to node from nodes
"""
nodes = np.asarray(nodes)
dist_2 = np.sum((nodes - node)**2, axis=1)
return np.argmin(dist_2)
logger.debug("Image used for tasselation reference: " + fitsfile)
fits = pyfits.open(fitsfile)
hdr, data = lib_img.flatten(fits)
w = pywcs.WCS(hdr)
pixsize = np.abs(hdr['CDELT1'])
# Get facets central pixels
ras = np.array([d.position_cal[0] for d in directions])
decs = np.array([d.position_cal[1] for d in directions])
x_fs, y_fs = w.all_world2pix(ras, decs, 0, ra_dec_order=True)
# keep trak of numbers in the direction names to name correctly patches in the fits files
# in this way Isl_patch_12 will have "12" into the fits for that patch.
nums = [d.isl_num for d in directions]
x_c = data.shape[0] / 2.
y_c = data.shape[1] / 2.
# Check if dir is in img, otherwise drop
idx_for_facet = []
for i, direction in enumerate(directions):
x, y = w.all_world2pix(ras[i], decs[i], 0, ra_dec_order=True)
if x < 0 or x > data.shape[0] or y < 0 or y > data.shape[1]:
logger.info(
'Direction %s is outside the primary beam and will not have a facet (it will still be a calibrator).'
% direction.name)
else:
idx_for_facet.append(i)
# convert to pixel space (voronoi must be in eucledian space)
x1 = 0
y1 = 0
x2 = data.shape[1] # note that y is before x in fits.data
y2 = data.shape[0]
# do tasselization
vor = Voronoi(
np.array((x_fs[idx_for_facet], y_fs[idx_for_facet])).transpose())
box = np.array([[x1, y1], [x2, y2]])
impoly = voronoi_finite_polygons_2d_box(vor, box)
# create fits mask (each region one number)
x, y = np.meshgrid(np.arange(x2),
np.arange(y2)) # make a canvas with coordinates
x, y = x.flatten(), y.flatten()
pixels = np.vstack((x, y)).T
data_facet = np.zeros(shape=data.shape)
for num, poly in zip(nums, impoly):
p = Path(poly)
pixels_region = p.contains_points(pixels)
data_facet[pixels_region.reshape(y2, x2)] = num
# put all values in each island equal to the closest region
struct = generate_binary_structure(2, 2)
data = binary_dilation(data, structure=struct,
iterations=3).astype(data.dtype) # expand masks
blobs, number_of_blobs = label(data.astype(int).squeeze(),
structure=[[1, 1, 1], [1, 1, 1], [1, 1, 1]])
center_of_masses = center_of_mass(data, blobs,
list(range(number_of_blobs + 1)))
for blob in range(1, number_of_blobs + 1):
# get closer facet
facet_num = closest_node(
center_of_masses[blob],
np.array([y_fs[idx_for_facet], x_fs[idx_for_facet]]).T)
# put all pixel of that mask to that facet value
data_facet[blobs == blob] = nums[facet_num]
# save fits mask
pyfits.writeto(out_mask, data_facet, hdr, overwrite=True)
# save regions
if not os.path.isdir(outdir_reg): os.makedirs(outdir_reg)
all_s = []
for i, poly in enumerate(impoly):
ra, dec = w.all_pix2world(poly[:, 0], poly[:, 1], 0, ra_dec_order=True)
coords = np.array([ra, dec]).T.flatten()
s = Shape('Polygon', None)
s.coord_format = 'fk5'
s.coord_list = coords # ra, dec, radius
s.coord_format = 'fk5'
s.attr = ([], {
'width': '2',
'point': 'cross',
'font': '"helvetica 16 normal roman"'
})
s.comment = 'color=red'
all_s.append(s)
regions = pyregion.ShapeList([s])
regionfile = outdir_reg + '/' + directions[
idx_for_facet[i]].name + '.reg'
regions.write(regionfile)
# add names for all.reg
for d in directions:
s = Shape('circle', None)
s.coord_format = 'fk5'
s.coord_list = [d.position_cal[0], d.position_cal[1],
0.01] # ra, dec, radius
s.coord_format = 'fk5'
s.attr = ([], {
'width': '1',
'point': 'cross',
'font': '"helvetica 16 normal roman"'
})
s.comment = 'color=white text="%s"' % d.name
all_s.append(s)
regions = pyregion.ShapeList(all_s)
regionfile = outdir_reg + '/all.reg'
regions.write(regionfile)
logger.debug(
'There are %i regions within the PB and %i outside (no facet).' %
(len(idx_for_facet), len(directions) - len(idx_for_facet)))
# plot tesselization
if png is not None:
import matplotlib.pyplot as pl
pl.figure(figsize=(8, 8))
ax1 = pl.gca()
voronoi_plot_2d(vor,
ax1,
show_vertices=True,
line_colors='black',
line_width=2,
point_size=4)
for i, d in enumerate(directions):
ax1.text(x_fs[i], y_fs[i], d.name, fontsize=15)
ax1.plot([x1, x1, x2, x2, x1], [y1, y2, y2, y1, y1])
ax1.set_xlabel('RA (pixel)')
ax1.set_ylabel('Dec (pixel)')
ax1.set_xlim(x1, x2)
ax1.set_ylim(y1, y2)
logger.debug('Save plot: %s' % png)
pl.savefig(png)
def make_finder_chart(target, radius, save_prefix, service=SkyView.get_images,
service_kwargs={'survey':['2MASS-K'], 'pixels':500},
alma_kwargs={'public':False, 'science':False},
private_band_colors=('red','darkred','orange','brown','maroon'),
public_band_colors=('blue','cyan','green','turquoise','teal'),
integration_time_contour_levels=np.logspace(0,5,base=2, num=6),
):
"""
Create a "finder chart" showing where ALMA has pointed in various bands,
including different color coding for public/private data and each band.
Contours are set at various integration times.
Parameters
----------
target : `astropy.coordinates` or str
A legitimate target name
radius : `astropy.units.Quantity`
A degree-equivalent radius
save_prefix : str
The prefix for the output files. Both .reg and .png files will be written.
The .reg files will have the band numbers and public/private appended,
while the .png file will be named prefix_almafinderchart.png
service : function
The `get_images` function of an astroquery service, e.g. SkyView.
service_kwargs : dict
The keyword arguments to pass to the specified service. For example,
for SkyView, you can give it the survey ID (e.g., 2MASS-K) and the
number of pixels in the resulting image. See the documentation for the
individual services for more details.
alma_kwargs : dict
Keywords to pass to the ALMA archive when querying.
private_band_colors / public_band_colors : tuple
A tuple or list of colors to be associated with private/public observations
in the various bands
integration_time_contour_levels : list or np.array
The levels at which to draw contours in units of seconds. Default is
log-spaced (2^n) seconds: [ 1., 2., 4., 8., 16., 32.])
"""
import aplpy
import pyregion
from pyregion.parser_helper import Shape
log.info("Querying {0} for images".format(service))
images = service(target, radius=radius, **service_kwargs)
log.info("Querying ALMA around {0}".format(target))
catalog = Alma.query_region(coordinate=target, radius=radius,
**alma_kwargs)
primary_beam_radii = [approximate_primary_beam_sizes(row['Frequency support'])
for row in catalog]
bands = np.unique(catalog['Band'])
log.info("The bands used include: {0}".format(bands))
band_colors_priv = dict(zip(bands, private_band_colors))
band_colors_pub = dict(zip(bands, public_band_colors))
private_circle_parameters = {band: [(row['RA'],row['Dec'],np.mean(rad).to(u.deg).value)
for row,rad in zip(catalog, primary_beam_radii)
if row['Release date']!='' and row['Band']==band]
for band in bands}
public_circle_parameters = {band: [(row['RA'],row['Dec'],np.mean(rad).to(u.deg).value)
for row,rad in zip(catalog, primary_beam_radii)
if row['Release date']=='' and row['Band']==band]
for band in bands}
unique_private_circle_parameters = {band:
np.array(list(set(private_circle_parameters[band])))
for band in bands}
unique_public_circle_parameters = {band:
np.array(list(set(public_circle_parameters[band])))
for band in bands}
for band in bands:
log.info( "BAND {0}".format(band) )
privrows = sum((catalog['Band']==band) & (catalog['Release date'] != ''))
pubrows = sum((catalog['Band']==band) & (catalog['Release date'] == ''))
log.info("PUBLIC: Number of rows: {0}. Unique pointings: "
"{1}".format(pubrows,
len(unique_public_circle_parameters[band])))
log.info( "PRIVATE: Number of rows: {0}. Unique pointings: "
"{1}".format(privrows,
len(unique_private_circle_parameters[band])))
prv_regions = {band: pyregion.ShapeList([Shape('circle',[x,y,r]) for x,y,r
in
private_circle_parameters[band]])
for band in bands}
pub_regions = {band: pyregion.ShapeList([Shape('circle',[x,y,r]) for x,y,r
in
public_circle_parameters[band]])
for band in bands}
for band in bands:
circle_pars = np.vstack([x for x in (private_circle_parameters[band],
public_circle_parameters[band]) if any(x)])
for r,(x,y,c) in zip(prv_regions[band]+pub_regions[band],
circle_pars):
r.coord_format = 'fk5'
r.coord_list = [x,y,c]
r.attr = ([], {'color': 'green', 'dash': '0 ', 'dashlist': '8 3',
'delete': '1 ', 'edit': '1 ', 'fixed': '0 ',
'font': '"helvetica 10 normal roman"', 'highlite':
'1 ', 'include': '1 ', 'move': '1 ', 'select': '1',
'source': '1', 'text': '', 'width': '1 '})
if prv_regions[band]:
prv_regions[band].write('{0}_band{1}_private.reg'.format(save_prefix, band))
if pub_regions[band]:
pub_regions[band].write('{0}_band{1}_public.reg'.format(save_prefix, band))
prv_mask = {band: fits.PrimaryHDU(prv_regions[band].get_mask(images[0][0]).astype('int'),
header=images[0][0].header) for band in bands
if prv_regions[band]}
pub_mask = {band: fits.PrimaryHDU(pub_regions[band].get_mask(images[0][0]).astype('int'),
header=images[0][0].header) for band in bands
if pub_regions[band]}
hit_mask_public = {band: np.zeros_like(images[0][0].data) for band in pub_mask}
hit_mask_private = {band: np.zeros_like(images[0][0].data) for band in prv_mask}
mywcs = wcs.WCS(images[0][0].header)
for band in bands:
log.debug('Band: {0}'.format(band))
for row,rad in zip(catalog, primary_beam_radii):
shape = Shape('circle', (row['RA'], row['Dec'],np.mean(rad).to(u.deg).value))
shape.coord_format = 'fk5'
shape.coord_list = (row['RA'], row['Dec'],np.mean(rad).to(u.deg).value)
shape.attr = ([], {'color': 'green', 'dash': '0 ', 'dashlist': '8 3 ',
'delete': '1 ', 'edit': '1 ', 'fixed': '0 ',
'font': '"helvetica 10 normal roman"',
'highlite': '1 ', 'include': '1 ', 'move': '1 ',
'select': '1 ', 'source': '1', 'text': '',
'width': '1 '})
log.debug('{1} {2}: {0}'.format(shape, row['Release date'], row['Band']))
if row['Release date']!='' and row['Band']==band and band in prv_mask:
(xlo,xhi,ylo,yhi),mask = pyregion_subset(shape,
hit_mask_private[band],
mywcs)
log.debug("{0},{1},{2},{3}: {4}".format(xlo,xhi,ylo,yhi,mask.sum()))
hit_mask_private[band][ylo:yhi,xlo:xhi] += row['Integration']*mask
if row['Release date']=='' and row['Band']==band and band in pub_mask:
(xlo,xhi,ylo,yhi),mask = pyregion_subset(shape,
hit_mask_public[band],
mywcs)
log.debug("{0},{1},{2},{3}: {4}".format(xlo,xhi,ylo,yhi,mask.sum()))
hit_mask_public[band][ylo:yhi,xlo:xhi] += row['Integration']*mask
fig = aplpy.FITSFigure(images[0])
fig.show_grayscale(stretch='arcsinh')
for band in bands:
if band in pub_mask:
fig.show_contour(fits.PrimaryHDU(data=hit_mask_public[band],
header=images[0][0].header),
levels=integration_time_contour_levels,
colors=[band_colors_pub[band]]*6)
if band in prv_mask:
fig.show_contour(fits.PrimaryHDU(data=hit_mask_private[band],
header=images[0][0].header),
levels=integration_time_contour_levels,
colors=[band_colors_priv[band]]*6)
fig.save('{0}_almafinderchart.png'.format(save_prefix))
return images, catalog, hit_mask_public, hit_mask_private
def make_finder_chart_from_image_and_catalog(image, catalog, save_prefix,
alma_kwargs={'public': False,
'science': False},
bands=(3,4,5,6,7,8,9),
private_band_colors=('maroon',
'red',
'orange',
'coral',
'brown',
'yellow',
'mediumorchid'),
public_band_colors=('blue',
'cyan',
'green',
'turquoise',
'teal',
'darkslategrey',
'chartreuse'),
integration_time_contour_levels=np.logspace(0,
5,
base=2,
num=6),
save_masks=False,
use_saved_masks=False,
):
"""
Create a "finder chart" showing where ALMA has pointed in various bands,
including different color coding for public/private data and each band.
Contours are set at various integration times.
Parameters
----------
image : fits.PrimaryHDU or fits.ImageHDU object
The image to overlay onto
catalog : astropy.Table object
The catalog of ALMA observations
save_prefix : str
The prefix for the output files. Both .reg and .png files will be
written. The .reg files will have the band numbers and
public/private appended, while the .png file will be named
prefix_almafinderchart.png
alma_kwargs : dict
Keywords to pass to the ALMA archive when querying.
private_band_colors / public_band_colors : tuple
A tuple or list of colors to be associated with private/public
observations in the various bands
integration_time_contour_levels : list or np.array
The levels at which to draw contours in units of seconds. Default is
log-spaced (2^n) seconds: [ 1., 2., 4., 8., 16., 32.])
"""
import aplpy
import pyregion
from pyregion.parser_helper import Shape
primary_beam_radii = [
approximate_primary_beam_sizes(row['Frequency support'])
for row in catalog]
all_bands = bands
bands = used_bands = np.unique(catalog['Band'])
log.info("The bands used include: {0}".format(used_bands))
band_colors_priv = dict(zip(all_bands, private_band_colors))
band_colors_pub = dict(zip(all_bands, public_band_colors))
log.info("Color map private: {0}".format(band_colors_priv))
log.info("Color map public: {0}".format(band_colors_pub))
if use_saved_masks:
hit_mask_public = {}
hit_mask_private = {}
for band in bands:
pubfile = '{0}_band{1}_public.fits'.format(save_prefix, band)
if os.path.exists(pubfile):
hit_mask_public[band] = fits.getdata(pubfile)
privfile = '{0}_band{1}_private.fits'.format(save_prefix, band)
if os.path.exists(privfile):
hit_mask_private[band] = fits.getdata(privfile)
else:
today = np.datetime64('today')
private_circle_parameters = {
band: [(row['RA'], row['Dec'], np.mean(rad).to(u.deg).value)
for row, rad in zip(catalog, primary_beam_radii)
if not row['Release date'] or
(np.datetime64(row['Release date']) > today and row['Band'] == band)]
for band in bands}
public_circle_parameters = {
band: [(row['RA'], row['Dec'], np.mean(rad).to(u.deg).value)
for row, rad in zip(catalog, primary_beam_radii)
if row['Release date'] and
(np.datetime64(row['Release date']) <= today and row['Band'] == band)]
for band in bands}
unique_private_circle_parameters = {
band: np.array(list(set(private_circle_parameters[band])))
for band in bands}
unique_public_circle_parameters = {
band: np.array(list(set(public_circle_parameters[band])))
for band in bands}
release_dates = np.array(catalog['Release date'], dtype=np.datetime64)
for band in bands:
log.info("BAND {0}".format(band))
privrows = sum((catalog['Band'] == band) &
(release_dates > today))
pubrows = sum((catalog['Band'] == band) &
(release_dates <= today))
log.info("PUBLIC: Number of rows: {0}. Unique pointings: "
"{1}".format(pubrows,
len(unique_public_circle_parameters[band])))
log.info("PRIVATE: Number of rows: {0}. Unique pointings: "
"{1}".format(privrows,
len(unique_private_circle_parameters[band])))
prv_regions = {
band: pyregion.ShapeList([Shape('circle', [x, y, r]) for x, y, r
in private_circle_parameters[band]])
for band in bands}
pub_regions = {
band: pyregion.ShapeList([Shape('circle', [x, y, r]) for x, y, r
in public_circle_parameters[band]])
for band in bands}
for band in bands:
circle_pars = np.vstack(
[x for x in (private_circle_parameters[band],
public_circle_parameters[band]) if any(x)])
for r, (x, y, c) in zip(prv_regions[band] + pub_regions[band],
circle_pars):
r.coord_format = 'fk5'
r.coord_list = [x, y, c]
r.attr = ([], {'color': 'green', 'dash': '0 ', 'dashlist': '8 3',
'delete': '1 ', 'edit': '1 ', 'fixed': '0 ',
'font': '"helvetica 10 normal roman"', 'highlite':
'1 ', 'include': '1 ', 'move': '1 ', 'select': '1',
'source': '1', 'text': '', 'width': '1 '})
if prv_regions[band]:
prv_regions[band].write(
'{0}_band{1}_private.reg'.format(save_prefix, band))
if pub_regions[band]:
pub_regions[band].write(
'{0}_band{1}_public.reg'.format(save_prefix, band))
prv_mask = {
band: fits.PrimaryHDU(
prv_regions[band].get_mask(image).astype('int'),
header=image.header) for band in bands if prv_regions[band]}
pub_mask = {
band: fits.PrimaryHDU(
pub_regions[band].get_mask(image).astype('int'),
header=image.header) for band in bands if pub_regions[band]}
hit_mask_public = {band: np.zeros_like(image.data)
for band in pub_mask}
hit_mask_private = {band: np.zeros_like(image.data)
for band in prv_mask}
mywcs = wcs.WCS(image.header)
for band in bands:
log.debug('Band: {0}'.format(band))
for row, rad in ProgressBar(list(zip(catalog, primary_beam_radii))):
shape = Shape('circle', (row['RA'], row['Dec'],
np.mean(rad).to(u.deg).value))
shape.coord_format = 'fk5'
shape.coord_list = (row['RA'], row['Dec'],
np.mean(rad).to(u.deg).value)
shape.attr = ([], {'color': 'green', 'dash': '0 ',
'dashlist': '8 3 ',
'delete': '1 ', 'edit': '1 ', 'fixed': '0 ',
'font': '"helvetica 10 normal roman"',
'highlite': '1 ', 'include': '1 ', 'move': '1 ',
'select': '1 ', 'source': '1', 'text': '',
'width': '1 '})
log.debug('{1} {2}: {0}'
.format(shape, row['Release date'], row['Band']))
if not row['Release date']:
reldate = False
else:
reldate = np.datetime64(row['Release date'])
if (((not reldate) or (reldate > today)) and
(row['Band'] == band) and
(band in prv_mask)
):
# private: release_date = 'sometime' says when it will be released
(xlo, xhi, ylo, yhi), mask = pyregion_subset(
shape, hit_mask_private[band], mywcs)
log.debug("{0},{1},{2},{3}: {4}"
.format(xlo, xhi, ylo, yhi, mask.sum()))
hit_mask_private[band][ylo:yhi, xlo:xhi] += row['Integration']*mask
elif (reldate and (reldate <= today) and (row['Band'] == band) and
(band in pub_mask)):
# public: release_date = '' should mean already released
(xlo, xhi, ylo, yhi), mask = pyregion_subset(
shape, hit_mask_public[band], mywcs)
log.debug("{0},{1},{2},{3}: {4}"
.format(xlo, xhi, ylo, yhi, mask.sum()))
hit_mask_public[band][ylo:yhi, xlo:xhi] += row['Integration']*mask
if save_masks:
for band in bands:
if band in hit_mask_public:
hdu = fits.PrimaryHDU(data=hit_mask_public[band],
header=image.header)
hdu.writeto('{0}_band{1}_public.fits'.format(save_prefix, band),
clobber=True)
if band in hit_mask_private:
hdu = fits.PrimaryHDU(data=hit_mask_private[band],
header=image.header)
hdu.writeto('{0}_band{1}_private.fits'.format(save_prefix, band),
clobber=True)
fig = aplpy.FITSFigure(fits.HDUList(image), convention='calabretta')
fig.show_grayscale(stretch='arcsinh')
for band in bands:
if band in hit_mask_public:
fig.show_contour(fits.PrimaryHDU(data=hit_mask_public[band],
header=image.header),
levels=integration_time_contour_levels,
colors=[band_colors_pub[band]] * len(integration_time_contour_levels),
convention='calabretta')
if band in hit_mask_private:
fig.show_contour(fits.PrimaryHDU(data=hit_mask_private[band],
header=image.header),
levels=integration_time_contour_levels,
colors=[band_colors_priv[band]] * len(integration_time_contour_levels),
convention='calabretta')
fig.save('{0}_almafinderchart.png'.format(save_prefix))
return image, catalog, hit_mask_public, hit_mask_private