Aquila-Consortium/csiborgtools
0
0
Fork 0
mirror of https://github.com/Richard-Sti/csiborgtools.git synced 2024-12-22 21:38:03 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add nside2radec

Browse source
This commit is contained in:
rstiskalek 2023-06-01 22:57:29 +01:00
parent c9829c0acc
commit 64bacc20db
1 changed files with 21 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
csiborgtools/field/utils.py
View file

@ -17,6 +17,7 @@ Utility functions for the field module.
""" """
from warnings import warn from warnings import warn
import healpy
import numpy import numpy
import smoothing_library as SL import smoothing_library as SL
@ -65,3 +66,23 @@ def smoothen_field(field, smooth_scale, boxsize, threads=1):
W_k = SL.FT_filter(boxsize, smooth_scale, field.shape[0], "Gaussian", W_k = SL.FT_filter(boxsize, smooth_scale, field.shape[0], "Gaussian",
threads) threads)
return SL.field_smoothing(field, W_k, threads) return SL.field_smoothing(field, W_k, threads)
def nside2radec(nside):
"""
Generate RA and declination for HEALPix pixel centres.
Parameters
----------
nside : int
HEALPix nside parameter.
Returns
-------
radec : array of shape `(npix, 2)`
RA and declination in degrees.
"""
pixs = numpy.arange(healpy.nside2npix(nside))
theta, phi = healpy.pix2ang(nside, pixs)
theta -= numpy.pi / 2
return numpy.rad2deg(numpy.vstack([phi, theta]).T)