The Observatorio Astrofísico de Javalambre (OAJ) is a Spanish astronomical ICTS (Infraestructura Científica y Técnica Singular) located at the Sierra de Javalambre in Teruel, Spain, particularly conceived and constructed by the Centro de Estudios de Física del Cosmos de Aragón (CEFCA) for carrying out large sky astronomical surveys. The OAJ mainly consists of two professional telescopes with large fields of view (FoV) and seeing-limited image quality all over their entire FoVs: the 2.5m Javalambre Survey Telescope, JST250, a large-etendue telescope with a FoV of 3 deg diameter, and the 80cm Javalambre Auxiliary Survey Telescope, JAST80, with a FoV of 2deg. Both telescopes are equipped with panoramic cameras, state-of-the-art, large format CCDs and unique sets of optical filters suited to survey the Universe in an unprecedented way all over the optical spectral range.
The OAJ is managed and operated by CEFCA, a foundation of public interest of the Departamento de Industria e Innovación of the Government of Aragón that was created in 2008 to define and construct the OAJ, as well as to carry out and promote its scientific exploitation. The main scientific topics of CEFCA focus on Cosmology and Galaxy Evolution, with a strong leadership and participation in the J-PLUS and J-PAS surveys. The CEFCA data center, UPAD, with more than 5PBs of storage capacity and a computing power of 450 cores with 3.5TB RAM memory, completes the OAJ Project at the city of Teruel, allowing to process and storage the data gathered with the OAJ telescopes.