Cat2Map

A C++ code for convgerting a galaxy catalogue to a HELPixMap

Denpendencies

1. Boost
2. HEALPix
3. CFITSIO
4. CMake

Build instructions

We require CMake to build the executables. The paths to Boost,HEALPix and CFITSIO can be passed at the build time as shown below.

$git clone https://github.com/tbs1980/Cat2Map.git
$cd Cat2Map
$mkdir build
$cd build
$cmake ../ -DCMAKE_PREFIX_PATH="path_to_boost;path_to_healpix;path_to_cfitsio"

Example

The arguments to Cat2Map is an ini file with correct specifications. The maps can be made by

$Cat2Map example.ini

In general the ini file will look like

[input]
; full path to input catalogue file
catlogue_file_name = ./test-ellip-noise0-catalog_100k.dat
; full path to the input mask
mask_file_name = ./euclid_mask.fits
; number of rows to be skipped while reading the catalogue file
skip_rows = 1
; delimiter of the catalogue file
delimiter = " "
; column corresponding to ra
col_ra = 0
; column corresponding to dec
col_dec = 1
; column corresponding to z
col_z = 2
; column corresponding to ellipticity 1
col_ellip_1 = 6
; column corresponding to ellipticity 2
col_ellip_2 = 7

[output]
; HEALPix resolution of the output map
n_side = 1024
; zmin and zmax of the galaxies to be samples
z_bounds = 0.8,1.2
; full path to the output file for writing the data map
data_map_file_name = ./test-ellip-noise0-catalog_100k.fits
; full path to the output file for writing the augmented mask
augmented_mask_file_name = ./euclid_aug_mask.fits

An example catalogue file format is shown below

#  ra dec z kappa gamma1 gamma2 ellip1 ellip2
	40.020103     -79.708305     0.99461716   -0.023294616   -0.014624927   0.0083968099   -0.014292001   0.0082056625
	40.109955     -79.707863      1.0331188   -0.027732531   -0.016495496  0.00099063676   -0.016050378  0.00096390524
	40.346882      -79.70549     0.98424661   -0.028683368   -0.019208925  -0.0071485126   -0.018673312  -0.0069491868
	40.526699     -79.708893      1.0228475   -0.018730894   -0.020199986   -0.009220086   -0.019828578  -0.0090505611
	44.319969       -79.7099     0.99026835   0.0079140151   -0.028427923   0.0035343564   -0.028654696   0.0035625505
	44.417561     -79.707756      1.0198203   0.0004159268   -0.023948593   0.0065980251   -0.023958558   0.0066007706
	44.629353     -79.713165      1.0236109  -0.0081229536   -0.011430762    0.014662232   -0.011338659    0.014544091
	44.771263     -79.711884      1.0239419   -0.010177474  -0.0094703306    0.016185584  -0.0093749175    0.016022515
	44.716331     -79.707947      1.0297984   -0.010177474  -0.0094703306    0.016185584  -0.0093749175    0.016022515
	44.825916     -79.711952     0.96221447   -0.014020724  -0.0095437663    0.014031175  -0.0094118062    0.013837167
	44.871864     -79.701172      1.0095795   -0.014020724  -0.0095437663    0.014031175  -0.0094118062    0.013837167
	44.941822     -79.715691     0.98328984   -0.019197885  -0.0091443472   0.0085198171  -0.0089721018   0.0083593354
	45.073326     -79.709381     0.97038674   -0.022463646  -0.0083685946   0.0012608439  -0.0081847357    0.001233143