arf class private members

class arf{
 private:

  vector<Real> m_LowEnergy;   // Start energy of bin
  vector<Real> m_HighEnergy;  // End energy of bin

  vector<Real> m_EffArea;     // Effective areas

  string m_EnergyUnits;       // Units for energies
  string m_arfUnits;          // Units for effective areas

  string m_Telescope;                             
  string m_Instrument;
  string m_Detector;
  string m_Filter;
  string m_ExtensionName;     // EXTNAME keyword in SPECRESP extension