LOFAR is a radio telescope that is based in The Netherlands but has stations throughout Europe, including in Chilbolton in the UK. It is the first of the 'new generation' of radio telescopes, where the telescope is able to see a huge fraction of sky at any single time, and the amount of sky that is able to be mapped is only dependent on the computing power. LOFAR will observe the Universe between 20-240 MHz, with a gap at 80-110MHz which the FM radio band occupies (e.g. Radio 1).
Oxford is a leading institute in LOFAR. Rob Fender was the original PI of LOFAR-UK and co-lead of the Transients Key Science Project (KSP), Matt Jarvis is one of two UK members on the LOFAR Surveys KSP management team and is chair of the Cosmology Working Group. Aris Karastergiou is the UK LOFAR Station manager and is a leading figure in searching for pulsars with LOFAR.
Scientifically we use LOFAR to investigate astrophysical transient sources and pulsars, all the way through to how star-formation activity and active galactic nuclei throughout the history of the Universe.