Elmer is a multi-purpose instrument for the GTC designed for both Imaging and Spectroscopy in the visible range (365 nm-1000 nm). Spectroscopy in Elmer is done by using 2 prisms, 2 grisms, and 6 VPHs as dispersive elements, providing resolving powers of 200, 1000, and 2500, respectively over the whole wavelength range for a 0.6'' slit width.

Elmer is a multi-purpose instrument for the GTC designed for both Imaging and Spectroscopy in the visible range (365-1000 nm). Imaging will be done in a 4.2' circular Field of View (FOV), through standard SDSS broad band filters (g', r', I', and z') as well as narrow band filters (Hα broad, Hα narrow, Hβ, [OI], [OII], [OIII], [SII] broad, and [SII]

EMIR Associate Science Team (EAST) is a scientific group in charge of developing an observing program complementary to that of GOYA, which might serve as a testing bed for all the kinds of science that EMIR can do. Hence EAST puts the emphasis on developing proposals which will exploit the most diverse capabilities of the spectrograph.

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EMIR (Balcells et al. 2000) is a near-infrared wide-field camera and multi-object spectrograph being built for the GTC. The Data Reduction Pipeline (DRP) will be optimized for handling and reducing near-infrared data acquired with EMIR.

The chronology of bulge and disk formation is a major unsolved issue in galaxy formation, which impacts on our global understanding of the Hubble sequence. We present colors of the nuclear regions of intermediate-redshift disk galaxies, with the aim of obtaining empirical information of ages of bulges at 0.1 < z < 1.3.