def get_position_model_colums(gal_model):
    """Return the data columns of a galaxy position model
    
    :param gal_model: One galaxy model from output of the sky model, already readed from .csv
    """
    
    ID = gal_model[:,0];
    RA = gal_model[:,1];
    RA_err = gal_model[:,2];
    Dec = gal_model[:,3];
    Dec_err = gal_model[:,4];
    Flux = gal_model[:,5];
    Flux_err = gal_model[:,6];
    Epoch = gal_model[:,7];

    return ID, RA, RA_err, Dec, Dec_err, Flux, Flux_err, Epoch;