ELMER is a visible imager spectrograph currently scheduled to be in operation at the GTC on Day One. This paper covers engineering aspects of the instrument and summarizes five poster contributions presented at this conference. ELMER is an instrument managed directly by the GTC Project Office, which has developed the preliminary design and large

Taking into account effects of hyperfine structure, we calculated the synthetic solar spectrum for wavelength intervals around nine neutral manganese lines. To estimate values of hyperfine components we used the Oxford total absorption oscillator strength measurements (Booth et al. 1983). We compared observed profiles (Photometric Atlas of the

We propose to perform deep narrow band imaging in several emission lines of interest for a sample of blue compact dwarf galaxies at the GTC, with the OSIRIS facility in tunable filter mode. From the emission line maps, we will determine the physical properties of the diffuse ionized gas and disentangle the nature of the ionizing source.

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The Gran Telescopio Canarias (GTC), a 10 meter segmented-mirror telescope, now at an advanced stage of construction on La Palma (Spain), will shortly be entering its integration phase. First light is planned for the second half of 2003, with science operations scheduled for the end of 2004. This represents a small delay against the originally

The global properties of early-type galaxies are fairly well described through a linear relation (the Fundamental Plane, FP [2],[3]) in the space defined by three observables: the effective radius r e, the average surface brightness μ_e and the central velocity dispersion σ_c. The FP has been shown to be close to the plane defining the virial