Francesca Schiavon
Joined: 30 Jun 2011 Posts: 1 Affiliation: University of Bologna

Posted: July 07 2011 


Dear all,
I would like to use the extended version of CAMB (http://camb.info/sources/) which also gives the theoretical cl ISWLSS but I have some doubts about the outputs of the code. If the params.ini is as attached below, which is the ISWLSS crosscorrelation column in the output file (C_{Phi} C_{PhiT} C_{win_1} C_{win_2}... C_{Win_T1} C_{Win_T2} .... C_{win1_win2} ...)?
And about this, how to set the count_* parameters to have just ISW? Do I have to put just
count_ISW = T
?
If I wish to consider a 'mean' redshift = 1 and a bias term = 1.98, should I consider
redshift_bias(1) = 1.98
?
And how can I take into account the window function of the survey? with the redshift_sigma(1)?
Another issue is the units of the angular power spectrum of the crosscorrelations (which I understand as band powers, right?).
Thanks,
francesca
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#Parameters for CAMB with 21cm, lensing and number counts
#output_root is prefixed to output file names
output_root = test
#for 21cm C_{l} with sharp window use get_transfer=T, transfer_21cm_cl=T
#for broad window and other sources use get_scalar_cls=T
get_scalar_cls = T
get_transfer = F
get_vector_cls = F
get_tensor_cls = F
want_CMB = T
#Whether transfer functions are 21cm (monopole and velocity), or standard
Do21cm = F
#l_{max_scalar} = 10000
#for 21cm k_eta_max_scalar need to be at least 5000; for lensing is reset automatically
#k_eta_max_scalar = 20000
l_{max_scalar} = 2000
k_eta_max_scalar = 4000
# 0: linear, 1: nonlinear matter power (HALOFIT), 2: nonlinear C_{l} (HALOFIT approx)
#Or compile with NONLINEAR = nonlinear_PT to use perturbation theory, e.g. for 21cm nonlinear approx
do_nonlinear = 0
#only use limber approx if you don't want crosscorrelation
limber_windows = F
#output 21cm spectra in mK (rather than dimensionless)
use_mK = F
### 21cm ###
line_basic = F
line_distortions = F
line_extra = F
line_phot_quadrupole = F
line_phot_dipole = F
line_reionization = F
#### number counts ####
#whether spectra include lensing effect
DoRedshiftLensing = T
counts_density = T
counts_redshift = F
counts_radial = F
counts_timedelay = F
counts_ISW =T
counts_velocity =F
counts_potential = F
#counts_evolve =T allows for nonconstant comoving source density
#uses function counts_background_z in modules_redshift space;
#if T by default assumes window includes all sources; if F then assumes constant comoving source density
counts_evolve = F
### window functions ###
#Number of zwindows to use for sources. assumed Gaussian  edit Window_f_{a} in modules.f90.
num_redshiftwindows = 1
#Set of indexed parameters for each window function
#Redshift of the window for C_{l}
redshift(1) =50
# 21cm, counts or lensing
redshift_kind(1) = counts
# if 21cm, width of T_{b} window in Mhz
redshift_sigma_Mhz(1) = 0.01
#if not 21cm, width in z
redshift_sigma(1) = 1
#if counts (change redshift_kind(1)), the bias
redshift_bias(1) = 4.5
#for counts magnitudelimited survey; often called s or p, assumed constant
redshift_dlog10Ndm(1) = 0.42
massless_neutrinos = 3.04
massive_neutrinos = 0
nu_mass_eigenstates = 1
nu_mass_degeneracies = 1
#nu_mass_fractions = .4285714286 .5714285714
nu_mass_fractions = 1
#massive_nu_approx: 0  integrate distribution function
# 1  switch to series in velocity weight once nonrelativistic
# 2  use fast approximate scheme (CMB only accurate for light neutrinos)
massive_nu_approx = 3
#Settings for transfer functions/matter power spectrum/21cm sharpz power spectrum
transfer_high_precision = T
transfer_kmax = 500
transfer_k_{per_logint} = 0
transfer_num_redshifts = 1
transfer_redshift(1) = 50
#Whether to compute 21cm C_{l} from transfer functions for sharp redshift window
#using only monopole source and redshift distortions
transfer_21cm_cl = F
#Whether to turn off smallscale late time radiation hierarchies (save time,v. accurate)
# not tested with redshift window functions
do_late_rad_trunction = F
RECFAST_fudge = 1.14
#if do_lensing then scalar_output_file contains additional columns of l^{4} C_{l}^{pp} and l^{3} C_{l}^{pT}
#where p is the projected potential. Output lensed CMB Cls (without tensors) are in lensed_output_file below.
do_lensing = F
#Maximum multipole and k*eta.
# Note that C_{ls} near l_{max} are inaccurate (about 5%), go to 50 more than you need
# Lensed power spectra are computed to l_{max_scalar}−250 where accurate at %level
# For high accuracy lensed spectra set l_{max_scalar} = (l you need) + 500
# To get accurate lensed BB need to have l_{max_scalar}>2000,
k_eta_max_scalar > 10000
# Otherwise k_eta_max_scalar=2*l_{max_scalar} usually suffices
# Tensor settings should be less than or equal to the above
l_{max_tensor} = 500
k_eta_max_tensor = 4000
#Main cosmological parameters, neutrino masses are assumed degenerate
# If use_phyical set phyiscal densities in baryone, CDM and neutrinos + Omega_k
use_physical = F
#ombh2 = 0.223253E−01
#omch2 = 0.104284E+00
#omk = 0
#omnuh2 = 0
hubble = 0.731586E+02
#effective equation of state parameter for dark energy, assumed
constant w = −1
#constant comoving sound speed of the dark energy (1=quintessence) cs2_lam = 1
#if use_physical = F set parameters as here
omega_baryon = 0.0462
omega_cdm = 0.2538
omega_lambda = 0.7
omega_neutrino = 0
#massless_neutrinos is the effective number (for QED + noninstantaneous decoupling)
temp_cmb = 2.725
helium_fraction = 0.24
#Reionization (assumed sharp), ignored unless reionization = T
reionization = T
re_use_optical_depth = T
re_optical_depth = 0.912305E−01
#If re_use_optical_depth = F then use following, otherwise ignored
re_redshift = 12
re_ionization_frac = 1
#Initial power spectrum, amplitude, spectral index and running
initial_power_num = 1
scalar_amp(1) = 2.0424e−009
scalar_spectral_index(1) = 0.954663E+00
scalar_nrun(1) = 0
tensor_spectral_index(1) = 0
#ratio is that of the initial tens/scal power spectrum amplitudes
initial_ratio(1) = 0.1
#note vector modes use the scalar settings above
#Initial scalar perturbation mode (adiabatic=1, CDM iso=2, Baryon iso=3,
#neutrino density iso =4, neutrino velocity iso = 5)
initial_condition = 1
#If above is zero, use modes in the following (totally correlated)
proportions
#Note: we assume all modes have the same initial power spectrum
initial_vector = −1 0 0 0 0
#For vector modes: 0 for regular (neutrino vorticity mode), 1 for magnetic
vector_mode = 0
#Normalization
COBE_normalize = F
##CMB_outputscale scales the output Cls
#To get MuK^{2} set realistic initial amplitude (e.g. scalar_amp(1) = 2.3e−9
above) and
#otherwise for dimensionless transfer functions set scalar_amp(1)=1 and use
CMB_outputscale = 1
#CMB_outputscale = 7.4311e12
#Transfer function settings, transfer_kmax=0.5 is enough for sigma_8
transfer_filename(1) =
#Matter power spectrum output against k/h in units of h^{3} Mpc^{−3}
transfer_matterpower(1) =
#21cm C_{l} for sharp window
transfer_cl_filename(1) =
#Output files not produced if blank. make camb_fits to use use the FITS
setting.
scalar_output_file = scalCls.dat
scalar_covariance_output_file = scalCovCls.dat
vector_output_file = vecCls.dat
tensor_output_file = tensCls.dat
total_output_file = totCls.dat
lensed_output_file = lensedCls.dat
FITS_filename = scalCls.fits
##Optional parameters to control the computation speed,accuracy and feedback
#If feedback_level > 0 print out useful information computed about the model
feedback_level = 1
# 1: curved correlation function, 2: flat correlation function, 3: inaccurate harmonic method
lensing_method = 1
accurate_BB =T
#Recombination calculation: 1: RECFAST, 2: RECFAST+astroph/0501672
corrections
recombination = 1
#Whether you are bothered about polarization.
accurate_polarization = T
#Whether you are bothered about percent accuracy on EE from reionization
accurate_reionization = T
#whether or not to include neutrinos in the tensor evolution equations
do_tensor_neutrinos = F
#if true, get accurate gas temperature evolution given recombination model including
#approximate perturbed recombination; also affects baryons for k >~ 300/Mpc.
evolve_delta_xe = F
#Computation parameters
#if number_of_threads=0 assigned automatically
number_of_threads = 0
#Default scalar accuracy is about 0.3% (except lensed BB).
#For 0.1%level try accuracy_boost=2, l_accuracy_boost=2.
#Increase accuracy_boost to decrease time steps, use more k values, etc.
#Decrease to speed up at cost of worse accuracy. Suggest 0.8 to 3.
accuracy_boost = 1
#Larger to keep more terms in the hierarchy evolution.
l_accuracy_boost = 1
#Increase to use more C_{l} values for interpolation.
#Increasing a bit will improve the polarization accuracy at l up to 200 
#interpolation errors may be up to 3%
#Decrease to speed up nonflat models a bit
l_sample_boost = 1 
