def return_calrep_error_column_names(calrep_model_value_columns,error_suffix='g'):
    """Returns the column names for errors in a calrep model. For example if the
    calrep model value column names are ["magS11","argS11"], then it returns ["uMgS11","uAgS11"] """
    error_columns = []
    for column in calrep_model_value_columns[:]:
        error_column = column.replace("mag", "uM" + error_suffix)
        error_column = error_column.replace("arg", "uA" + error_suffix)
        error_column = error_column.replace("Efficiency", "uE" + error_suffix)
        error_columns.append(error_column)
    return error_columns