GenISW: Simulated Integrated Sachs-Wolfe Maps
收藏NIAID Data Ecosystem2026-03-12 收录
下载链接：
https://zenodo.org/record/4088697
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资源简介：
Maps of the Integrated Sachs-Wolfe and ancillary data are provided for the following N-body simulations:
MICE Grand Challenge Lightcone Simulation
File Structure
MICE_ISW_map_zmin_0.0_zmax_1.4_SBT_normal_nside_256.fits
Main ISW map for MICE in healpix format at nside=256 for constributions from z = 0 to 1.4 constructed from normal boundary spherical Bessel transforms.
MICE_alm_zmin_0.0_zmax_1.4_SBT_normal.txt
Alms for the above, to generate maps at the desired nside
MICE_Full.zip
ISW maps, alms and theory cls for MICE ISW for contribution from z = 0 to 1.4
MICE_dz_02.zip
Same as above except these are divided into redshift bins of dz=0.2
Methods
Spherical Bessel Transform with normal and derivative boundary conditions.
Spherical Harmonic Scaling.
Francis & Peacock (2010) approximation.
Data Products
ISW maps in healpix format at nside=256 in units of K.
ISW alms in units of K provided in ascii format
Columns: real, imaginary.
To generate HEALPix map with the desired nside:
import numpy as np
import healpy as hp
alm_fname = #provide name to alm file
nside = #provide desired nside for map
data = np.loadtxt(alm_fname, unpack=True)
alm = data[0] + 1j*data[1]
isw_map = hp.alm2map(alm, nside)
Theoretical angular power spectra (Cls, which are provided unitless) with columns:
l: spherical harmonic l modes.
cl_ii: ISW auto-angular power spectra.
cl_id: ISW-density cross-angular power spectra.
cl_dd: Density auto-angular power spectra.
cl_ii_limber: ISW auto-angular power spectra using the limber approximation.
cl_id_limber`: ISW-density cross-angular power spectra using the limber approximation.
cl_dd_limber: Density auto-angular power spectra using the limber approximation.
Note: ISW maps and alms have already been multiplied by Tcmb = 2.7255.
Citing
Please cite the DOI for the zenodo repository.
Contact
Email: knaidoo@cft.edu.pl
创建时间：
2021-03-25
