def METHOD_NAME(file_path, file_name):
    """ Reads a list of detected stars from a CAMS CALSTARS format. 
    @param file_path: [string] path to the directory where the CALSTARS file is located
    @param file_name: [string] name of the CALSTARS file
    @return star_list: [list] a list of star data, entries:
        ff_name, star_data
        star_data entries:
            x, y, bg_level, level, fwhm
    """
    calstars_path = os.path.join(file_path, file_name)
    # Check if the CALSTARS file exits
    if not os.path.isfile(calstars_path):
        print('The CALSTARS file: {:s} does not exist!'.format(calstars_path))
        return False
    # Open the CALSTARS file for reading
    with open(calstars_path) as star_file:
        calibrationstars_list = []
        ff_name = ''
        star_data = []
        skip_lines = 0
        for line in star_file.readlines()[11:]:
            # Skip lines if neccessary
            if skip_lines > 0:
                skip_lines -= 1
                continue
            # Check for end of star entry
            if ("===" in line) or ("###" in line):
                # Add the star list to the main list
                calibrationstars_list.append([ff_name, star_data])
                # Reset the star list
                star_data = []
                continue
            # Remove newline
            line = line.replace('\n', '').replace('\r', '')
            if 'FF' in line:
                ff_name = line
                skip_lines = 2
                continue
            # Split the line
            line = line.split()
            if len(line) < 4:
                continue
            try:
                float(line[0])
                float(line[1])
                int(line[2])
                int(line[3])
            except:
                continue
            # Read FWHM if given
            if len(line) == 5:
                fwhm = float(line[4])
            else:
                fwhm = -1.0
            # Save star data
            star_data.append([float(line[0]), float(line[1]), int(line[2]), int(line[3]), fwhm])
    return calibrationstars_lis