<title>Anglo-Australian Telescope's 2dF Facility</title>

摘要

The 'two-degree field' (2dF) project at the Anglo-Australian Observatory (AAO) gives the 3.9 m Anglo-Australian telescope (AAT) a field of view two degrees in diameter at the prime focus, equipped with 400 optical fibers for multi-object spectroscopy. The basic components of 2dF are the corrector lens optics, the robot which positions the fibers and a pair of spectrographs. All these are mounted on a new 'top end ring' so that the whole assembly can be easily put on and off the telescope. Here we give an update on the status of 2dF, highlighting features which have changed or been developed since earlier reports.