The LOFAR radio environment
Offringa, Andre; de Bruyn, A G; Zaroubi, Saleem; van Diepen, Ger; Martinez Rubi, O; Labropoulos, Panos; Brentjens, Michiel A; Ciardi, Benedetta; Daiboo, S; Harker, Geraint; Jelic, VIBOR; Butcher, Harvey; Kazemi, S.; Pandey, V N; Schaye, J; Veligatla, V; Alexov, A; Bell, Michael R; Bonafede, A; Broderick, J; Conway, J E; Dettmar, R. -J.; Fender, R; Hassall, T. E; Hoeft, M; Karastergiou, A; Rafferty, D A; Smirnov, O; Stappers, B. W.; Steinmetz, Matthias; Swinbank, J; Wijers, R A M J
Aims. This paper discusses the spectral occupancy for performing radio astronomy with the Low-Frequency Array (LOFAR), with a focus on imaging observations. Methods. We have analysed the radio-frequency interference (RFI) situation in two 24-h surveys with Dutch LOFAR stations, covering 30-78 MHz with low-band antennas and 115-163 MHz with high-band antennas. This is a subset of the full frequency range of LOFAR. The surveys have been observed with a 0.76 kHz/1 s resolution. Results. We...[Show more]
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|Source:||Astronomy and Astrophysics|
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