2. Observations and data reduction
Spectra of For have been obtained with the 2.1 m telescope at CASLEO with the REOSC echelle spectrograph that is on loan from the Institut d'Astrophysique de Liège . The spectra were acquired from January 16 to 24 and December 5 to 11, 1995. The achieved was between 100 and 250. Details on observation and data reduction methods are given in Leone et al. (1997). Equivalent widths have been measured by a Gaussian fit of spectral lines after having removed possible continuum slope. Following Leone et al. (1995), we have estimated the error in the measured equivalent width by the relation:
where the quantity in brackets is the total extension of the line as deduced from the rotational broadening. We have assumed the value km s-1 given by Leone & Manfrè (1996). Typically, mÅ.
© European Southern Observatory (ESO) 2000
Online publication: July 7, 2000