healpy
37 posts — page 2
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Compare WebSky radio galaxies maps from PySM to Planck
I need to check that the amplitude of the maps of Radio Galaxies produced by WebSky are reasonable if compared to experimental results. The main worry is that being point sources, when we apply a beam using Spherical Harmonics transform we get spurious results due to the input maps not being band-limited.
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Fund healpy via GitHub Sponsors
Fund healpy via GitHub Sponsors
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Compare HEALPix and Gauss-Legendre pixelizations for sky emission modelling
import healpy as hp import numpy as np import matplotlib.pyplot as plt from time import time from astropy import units as u
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Plot HEALPix pixel boundaries
Some time ago I created a Jupyter Notebook based on plotly to create a 3D visualization of the boundaries of HEALPix pixels on the sphere.
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healpy 1.15.0 released
Just released healpy 1.15.0, this is a large release with many important changes, please test and open issues at New viz function projview based on plain matplotlib, with lon/lat labels and more
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Investigate rotation of masks in healpy
Investigating a question about healpy on Stackoverflow python import healpy as hp import numpy as np %matplotlib inline
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Correct a power spectrum by the instrument beam with healpy
If you are analyzing a map from an instrument with a specific beam width, you can correct the power spectrum by the smoothing factor caused by that beam and obtain a better approximation of the power spectrum of the orignal sky.
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Compute the Planck CMB temperature power spectrum with healpy anafast
import healpy as hp import numpy as np import os import astropy.units as u import matplotlib.pyplot as plt %matplotlib inline
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Install HEALPix and PolSpice in a conda environment
Some notes on how to install HEALPix and PolSpice inside a conda environment, with some details about doing it at NERSC, but most of the tutorial is independent of that.
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Example of the `healpy` query disc function
Example of the `healpy` query disc function
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Read and process Planck CMB power spectra with `healpy`
In this tutorial we will load CMB power spectra generated by the cosmological parameters measured by Planck, we will create a realization of the Spherical Harmonics coefficients $a{\ell m}$, save it to disk, and use them to create maps at different resolutions.
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Unit conversion with broadband detectors looking at the CMB
import healpy as hp import numpy as np import matplotlib.pyplot as plt from pysm3 import units as u import pysm3 as pysm %matplotlib inline
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Handle white noise with healpy 3 not-uniform and partial sky coverage
Simulate white noise maps and use hitmaps
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Handle white noise with healpy 2 partial sky coverage
Simulate white noise maps and use hitmaps
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Handle white noise with healpy 1 Full sky coverage
Simulate white noise maps and use hitmaps