The Instituto de Astrofisica is finalizing the design for a 10 m class optical/infrared telescope at the Observatory Roques de los Muchachos, La Palma. It is widely recognized that the traditional observing modes are inefficient so it is intended to explore other alternatives to maximize the scientific return from the telescope and to provide the

A project to build a large telescope at the Spanish Observatorio del Roque de los Muchachos (ORM), in the island of La Palma, has been underway for several years. Spanish astronomy has progressed steadily to the point where gaining access to large telescope time is key to its continued and future growth. Also the technological situation within

A project to build a large telescope at the Spanish Observatorio del Roque de los Muchachos (ORM), in the island of La Palma, has been underway for several years. The Gran Telescopio Canarias (GTC) project has thus been granted approval in February this year, with an allocation of 51% of the budget. Current activities of the telescope project are

First results of the inversion of Stokes I and V profiles from plage regions near disk center are presented. Both low and high spatial resolution spectra of Fe I 6301.5 and Fe I 6302.5 A obtained with the Advanced Stokes Polarimeter (ASP) have been considered for analysis. The thin flux-tube approximation, implemented in an LTE inversion code based

EN ESTA TESIS SE HA ANALIZADO LA CINEMATICA DE LAS REGIONES HII PERTENECIENTES AL AREA CENTRAL DE LA GALAXIA IRREGULAR GIGANTE NGC4449, MEDIANTE OBSERVACIONES REALIZADAS EN EL TELESCOPIO WILLIAM HERSCHEL DEL OBSERVATORIO DEL ROQUE DE LOS MUCHACHOS CON EL INTERFEROMETRO FABRY-PEROT TAURUS-II EN LAS LINEAS DE HALFA Y (OIII) LANDA5006.8 .EL OBJETIVO

Within the preliminary developments related to the Gran Telescopio Canarias, a test rig is being designed for the active control of the support system of the segmented primary mirror. The construction of this test rig will be divided in two phases: the first one will basically consist in the implementation and testing of a displacement sensor