mirror of
https://bitbucket.org/cosmicvoids/vide_public.git
synced 2025-07-04 15:21:11 +00:00
54 lines
1.5 KiB
Python
Executable file
54 lines
1.5 KiB
Python
Executable file
#!/usr/bin/env python
|
|
#+
|
|
# VIDE -- Void IDentification and Examination -- ./python_tools/setup.py
|
|
# Copyright (C) 2010-2014 Guilhem Lavaux
|
|
# Copyright (C) 2011-2014 P. M. Sutter
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; version 2 of the License.
|
|
#
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along
|
|
# with this program; if not, write to the Free Software Foundation, Inc.,
|
|
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
#+
|
|
|
|
# build a low-resolution mask given the actual galaxy positions
|
|
|
|
import numpy as np
|
|
import healpy as hp
|
|
import os
|
|
import shutil
|
|
import glob
|
|
import sys
|
|
|
|
galFile = "path/to/galaxy/file"
|
|
outMaskFile = "path/to/output/mask"
|
|
|
|
nside = 128
|
|
npix = hp.nside2npix(nside)
|
|
mask = np.zeros((npix))
|
|
|
|
for line in open(galFile):
|
|
line = line.split()
|
|
RA = np.float(line[3])
|
|
Dec = np.float(line[4])
|
|
z = np.float(line[5])
|
|
|
|
phi = np.pi/180.*RA
|
|
theta = Dec*np.pi/180.
|
|
theta = np.pi/2. - Dec*np.pi/180.
|
|
pos = np.zeros((3))
|
|
|
|
pix = hp.ang2pix(nside, theta, phi)
|
|
mask[pix] = 1.
|
|
|
|
print "Sky Fraction:", 1.0*len(mask[mask>0])/len(mask)
|
|
|
|
hp.write_map(outMaskFile, mask)
|