LyMAS

Bandeau-IAP

Mocks

Ramses simulation ("Horizon-MareNostrum"):
WMAP1 z=2.51 L_box=50 Mpc/h 1024³ DM particles+hydro

Post-treatment: hydro spectra at the BOSS resolution:

**Download binary or fits files:**
	Grids	Slices
Real Space	1024x256x256 (~256 M) .bin	1024x1024 (~4 M) .bin .fits
Redshift Space	1024x256x256 (~256 M) .bin	1024x1024 (~4 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)
field	type	size	comment
dummy	int(4B)	1	= 28
dim1	int(4B)	1	resolution of spectra (direction of the line of sight)
dim2	int(4B)	1	number of spectra per slice
dim3	int(4B)	1	number of slices
Lbox	float(4B)	1	simulation Box side
z	float(4B)	1	redshift
z-space	int(4B)	1	0: real-space 1:redshift-space
F_smoothing	float(4B)	1	Flux smoothing scale in Mpc/h (here BOSS scale)
dummy	int(4B)	1	= 28
dummy	int(4B)	1	= dim1dim24
Slice 1	float(4B)	dim1*dim2	1...dim1: trans. flux 1 1+dim1...2dim1: trans. flux 2 . .
dummy	int(4B)	1	= dim1dim24
dummy	int(4B)	1	= dim1dim24
Slice 2	float(4B)	dim1*dim2	1...dim1: trans. flux dim1dim2+1 1+dim1...2dim1: trans. flux dim1dim2+2 . .
dummy	int(4B)	1	= dim1dim24

etc...

dummy	int(4B)	1	= dim1dim24
Slice dim3	float(4B)	dim1*dim2	1...dim1: trans. flux dim1dim2(dim3-1)+1 1+dim1...2dim1: trans. flux dim1dim2(dim3-1)+2 . .
dummy	int(4B)	1	= dim1dim24

Structure of fits files (for slice only):
SIMPLE	=	T	/	true FITS file
BITPIX	=	-32	/	bits per pixel
NAXIS	=	2	/	number of dimensions
NAXIS1	=	1024	/	length of 1st dimension: F_s
NAXIS2	=	1024	/	length of 2nd dimension
LBOX	=	50	/	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(456,) = trans.flux 456

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