We present spectropolarimetric observations in the He I 1083.0 nm multiplet of a quiescent, hedgerow solar prominence. The data were taken with the Tenerife Infrared Polarimeter attached to the German Vacuum Tower Telescope at the Observatorio del Teide (Tenerife; Canary Islands; Spain). The observed He I circular and linear polarization signals

We report observations of the exoplanet host-star HD 80606 using the OSIRIS tunable filter imager. Very-high-precision, narrow-band photometry in four bandpasses around the K I absorption feature was acquired during the January 2010 transit of HD 80606b, with further off-transit observations taken January and April of 2010. We obtained differential

Massive (M_{stellar}≥10^{11} h_{70}^{-2} {M}_{&sun;}) galaxies are privileged probes to explore galaxy evolution, as their high luminosities allow us to track them over a large span of cosmic time. They suffer dramatic modifications in their sizes, star formation histories and number densities from high to low redshift. This must be also reflected

We present two new massive clusters, discovered during the second phase of our MASGOMAS project (MAssive Stars in Galactic Obscured MAssive clusterS). The second phase of the project focuses on a systematic search of OB-type star candidates over-densities. We also present new near-infrared photometry (J, H, and K_S) and mid-resolution follow-up

We present preliminary results of an on going program to study Lyman Alpha Emitters, Lyman Break Galaxies, and Quasars at high redshift with the OSIRIS instrument attached to the Gran Telescopio Canarias.

We have developed an innovative `index scanning technique" to map the stellar kinematics of early-type galaxies by measuring for the first time the absorption line strength of the near-IR CaII triplet with the Red Tunable Filters of OSIRIS at GTC. Unlike classical spectroscopy, these filters allow us to perform a two-dimensional study, taking