The Observatorio Astrofísico de Javalambre (OAJ) is a new astronomical facility located at the Sierra de Javalambre (Teruel), fully funded by the Spanish Administration and the Government of Aragón (50% each) through the Fondo de Inversiones de Teruel. The OAJ has been conceived for conducting large sky astronomical surveys. It will consist of two telescopes with large fields of view (FoV) and good image quality all over the entire FoV: T250, a large-etendue 2.55m telescope with a FoV of diameter 3deg, and T80, an 82cm with a FoV of 2deg.

The OAJ is currently under construction by the temporary joint venture of companies UTE-OAJ, constituted by the Belgian AMOS, in charge of the telescopes and related engineering, and its Spanish partner Torrescámara, for the civil work. The OAJ requirement definition, control, supervision and acceptance of the OAJ deliverables is responsibility of the Centro de Estudios de Física del Cosmos de Aragón (CEFCA).

CEFCA is a foundation of public interest of the Consejería de Ciencia, Tecnología y Universidad of the Government of Aragón which was created in 2008 to construct the OAJ and carry out its scientific exploitation. The main research lines of CEFCA are Cosmology and Galaxy Formation and Evolution.