SIMBAD references

The JHKL photometric system curently used at MSSSO is described via an extensive list of standard star values and filter transmission curves. At JHK this system is identifcal to the MSO system defined by Jones & Hyland (1982), except for small zero point differences which we impose here. Transformations are given between the MSSSO system and several near-infrared photometric systems in use in other observatories and the homogenised JHKL system proposed by Bessell & Brett (1988).