Simulation data
Contents
Introduction[edit]
The simulations process consists of modeling the sky using pre-Planck data, and then simulating the observations of that sky (actually those skies because they are simulated at many frequencies) using a model of the instruments and following the Planck scanning strategy. The first part is done by the Planck Sky Model (henceforth PSM), and the second part by the FFP6 (TBD- I guess this is the product, not the simulator) . A brief description of these is given below.
The Planck Sky Model[edit]
The Planck Sky model, a complete set data and code to simulate sky emission at millimeter-wave frequencies, is described in detail in delabrouille et al., arXiv/xxxx.xxxx.
The main simulations used to test and validate the Planck data anaysis pipelines (and, in paeticvular, component separation) makes use of simulations generated with version 1.7.7 of the PSM software. Sky emission comprises the following components: CMB, thermal dust, spinning dust, synchrotron, CO lines, free-free, thermal Sunyaev-Zel'dovich (SZ) effect (with first order relativistic corrections), kinetic SZ effect, radio and infrared sources, Cosmic Infrared Background (CIB).
TBW by J. Delabrouille
The Planck simulator a better name is welcome[edit]
TBW by J. Borril
Products delivered[edit]
What follows is the plan for the sims to be delivered as of mid Jan 2013. The text below is to be replaced by the description of the products described (AMo - 7/3/13)
Modelled sky (PSM outputs)[edit]
Full channel / nominal mission sky maps, Temperature only, in 9 Planck bands, of 10 components: cmb (lensed), CO, FIRB, free-free, synchrotron, thermal dust, spinning dust, kinetic SZ, thermal SZ, point sources
==> 10x9 maps for all components except CO) + 6 CO maps (present at freq > 100 GHz only) for a total of 96 maps which are to be grouped by frequency (as SkyMap products, into 10 FITS files, one for each component, names like COM_PSMMap-{component)_Nside_Relname.fits
Observed sky[edit]
A nominal mission map for each of the following
- a total map, i.e., sum of all components + noise
- a foregrounds map, i.e., sum of all components except cmb, including noise
- a point sources map, with the point sources alone
- the noise maps, with the noise alone
==> for a total of 36 maps grouped into 4 FITS files. Names like COM_SimMap-{total | foregrounds | sources | noise)_Nside_Relname.fits
Planck Sky Model
To be defined / determined
Cosmic Microwave background
Sunyaev-Zel'dovich
Flexible Image Transfer Specification
