2 Material

The star was observed at the Haute Provence Observatory (OHP) of the CNRS in 1997. The wavelength regions and dates of observation are given in Table 1.

  

Table 1: Observational data

The wavelength region is given in Angström and the date in day-month-year.

The observations were made with the 152 cm telescope, in July 1997. The spectrograph used was Aurélie (see Gillet et al. 1994) with a Thomson 7832 double bar detector, with 2048 photodiodes ($750\times 13~\mu$). The grating used had 300 grooves/mm, blazed at 6000 Å. The original dispersion is 33 Å/mm, with a resolution of 1.3 Å, equivalent to 65 km$\,$s^-1 at 6000 Å.

Calibrations were made with a tungsten lamp for flat field and in wavelength by means of a hollow cathod of thorium and argon for the blue and the red and thorium-neon for the near infrared.