Observations with the ROA CCD Transit Circle in Argentina

The Real Instituto y Observatorio de la Armada (ROA) meridian circle was built in 1948 by Grubb Parsons. It has an aperture of 18 cm and a focal length of 266 cm. In 1996 June was moved to the Estación de Altura Carlos Ulrrico Cesco in the República Argentina in 1996. Until november 1999 the observations were carry out with a moving slit micrometer. In spring 2001 the result of these observations has been published, forming the first Hispano-Argentinian Meridian Catalogue (HAMC). In december 1999 was installed a SpectraSource CCD camera of 1552 × 1024 pixels of 9 µm. The CCD camera observe in drift scan mode. A survey of the south hemisphere is being observed from +3° to −60° of declination.