Abstract
The main observational sample discussed in this paper comprises high-resolution, single snapshot spectra of 431 O- and B-type Galactic stars.
The IACOB database includes spectra from two different instruments: the FIES and HERMES spectrographs attached to the 2.56m Nordic Optical Telescope and the 1.2m Mercator telescope, respectively. Both instruments provide a complete wavelength coverage between 3800 and 7000Å (9000Å for the case of HERMES spectra), and the associated resolving power (R) of the spectra is 25000, 46000 (FIES) and 85000 (HERMES). By default, all the spectra in the IACOB database are reduced using the corresponding available pipelines (FIEStool and HermesDRS, respectively) and they are normalized by means of our own procedures implemented in IDL.
