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Realistic noise with no power below ell 30

Tag: mbs-s0007-20190618

Release date 18 June 2019

This is a re-run of the noise from the 201901_gaussian_fg_lensed_cmb_realistic_noise release but setting the noise power spectrum ell < 30 to zero. This is based on the assessment on the wiki, restricted

Input components

Each component is saved separately, all maps are in uK_CMB, IQU, single precision (float32)

Available maps

HEALPix maps at high resolution (nside 4096), initially 10 realizations of all the input components

Reference frame for noise maps is Equatorial, Gaussian foregrounds and CMB have no intrinsic reference frame. Bandpass for each channel is a delta function centered at the reference frequency.

Low resolution maps just for channels of the Small Aperture telescopes, initially 100 realizations of noise

Location at NERSC:

/project/projectdirs/sobs/v4_sims/mbs/201906_noise_no_lowell

The naming convention is:

{output_nside}/{content}/{num:04d}/simonsobs_{content}_uKCMB_{telescope}{band:03d}_nside{nside}_{num:04d}.fits"

where:

  • content is in [noise]
  • num is 0-9 for high resolution simulations and 10-109 for low resolution simulations.
  • telescope is sa or la
  • band is the channel frequency in GHz

Total disk space used is 1.1 T for the 4096 simulations and 43 GB for the 512 simulations.

Backed up to tape in ~zonca/sobs/mbs/201906_noise_no_lowell.

Hitmaps

Relative hitmaps for LAT and SAT are available in the hitmaps subfolder of the release. They are normalized to a maximum of 1. Hitmaps are provided both for classical and opportunistic scanning strategies, simulations use only the classical scanning strategy. Hitmaps were created using the create_hitmaps.py script.

Software