Bandeau-IAP IAP Ohio CRAL
accueil 

Mocks

Gadget simulation:
WMAP1z=2.51 Lbox=1.0 Gpc/h10243 DM particles

Post-treatment: LyMAS coherent using σ=1.0 Mpc/h - redshift space only:







Download binary or fits files:
Grids Slices
Redshift space 4096x256x256 (~1 G)      .bin 4096x4096 (~64 M)     .bin     .fits
The code read_grid.c can be used to read the binary files.

Structure of binary files:

The binary files are organized as follows (blocks are delimited by dummy variables indicating the size of the blocks for FORTRAN compatibility)

fieldtypesizecomment
dummyint(4B) 1= 28
dim1int(4B)1 resolution of spectra (direction of the line of sight)
dim2int(4B)1 number of spectra per slice
dim3int(4B)1 number of slices
Lboxfloat(4B)1 simulation Box side
zfloat(4B)1 redshift
z-spaceint(4B)10: real-space    1:redshift-space
F_smoothingfloat(4B)1 Flux smoothing scale in Mpc/h (here BOSS scale)
dummyint(4B) 1= 28
dummyint(4B) 1= dim1*dim2*4
Slice 1float(4B)dim1*dim21...dim1:                  trans. flux 1
1+dim1...2dim1:     trans. flux 2
                        .
                        .
dummyint(4B) 1= dim1*dim2*4
dummyint(4B) 1= dim1*dim2*4
Slice 2float(4B)dim1*dim21...dim1:                  trans. flux dim1*dim2+1
1+dim1...2dim1:     trans. flux dim1*dim2+2
                        .
                        .
dummyint(4B) 1= dim1*dim2*4
etc...
dummyint(4B) 1= dim1*dim2*4
Slice dim3float(4B)dim1*dim21...dim1:              trans. flux dim1*dim2*(dim3-1)+1
1+dim1...2dim1: trans. flux dim1*dim2*(dim3-1)+2
                        .
                        .
dummyint(4B) 1= dim1*dim2*4

Structure of fits files (for slice only):
SIMPLE= T / true FITS file
BITPIX= -32 / bits per pixel
NAXIS= 2 / number of dimensions
NAXIS1= 4096 / length of 1st dimension: Fs
NAXIS2= 4096 / length of 2nd dimension
LBOX= 1000 / Simulation box size (Mpc/h)
z= 2.51 / Redshift
F_SMOOTH= 0.696 / Flux smoothing scale in Mpc/h (here BOSS scale)

TAB = array(double, NAXIS1, NAXIS2)

ex: TAB(1264,) = flux 1264

Institut d'Astrophysique de Paris - 98 bis boulevard Arago - 75014 Paris  |  Contact: peirani AT iap.fr