python (65.1k questions)

javascript (44.2k questions)

reactjs (22.7k questions)

java (20.8k questions)

c# (17.4k questions)

html (16.3k questions)

r (13.7k questions)

android (12.9k questions)

Questions - healpy

Converting radial brightness profile to 2D intensity distribution

I have 2-column tables representing the light intensity distribution of a source as a function of its angular radius. These tables were obtained by digitizing the first plot and third plot in this fig...
test-img

Nownuri

astropy

healpy

Votes: 0

Answers: 1

Latest Answer

You should use hp.ang2pix(nside, lon, lat, lonlat=True) to go from longitude and latitude to a pixel index in a HEALPix map. Then you can put the value of the intensity in that location in the array. ...
test-img

Andrea Zonca

Different values of a_lm coefficients for different values of Nside in HealPix

I am using HealPix to calculate the outflow rate of particles through a sphere with some radius and I am trying to determine coefficients of spherical harmonics (basically fit some data with spherical...
test-img

Jack

python

astronomy

healpy

Votes: 0

Answers: 1

Latest Answer

In order to get the same values of a_lm coefficients it is necessary to normalize values of individual pixels with the pixel surface - dividing with 4*pi/npix. Another thing, in case it might be helpf...
test-img

Jack

Posts

Questions

Blogs

Jobs