FOR IMMEDIATE RELEASE EXPReS conducts first real-time e-VLBI observation with telescopes in Africa, Europe, North America and South America Dwingeloo, the Netherlands (23 May 2008) - Yesterday, members of the EXPReS project (Express Production Real-time e-VLBI Service) conducted a live demonstration of the first ever real-time, electronic Very Long Baseline Interferometry (e-VLBI) observations to simultaneously use telescopes in Africa, Europe, North America and South America. ...
... 2.3 Data acquisition Spectra generated by the Multibeam correlator contain the usual structure seen in spectra from other H i instruments: a bandpass spectrum which is the sum of the sky , ground and receiver temperatures multiplied by the product of the filters in the receiver chain; superimposed on this is a noise ... Note also that sources extended much beyond ,40 arcmin can be imaged poorly in HIPASS images because of the bandpass sidelobe effect described in Section 3.3. ...