LOFAR: The LOw-Frequency ARray
نویسندگان
چکیده
منابع مشابه
LOFAR, a new low frequency radio telescope
LOFAR, the Low Frequency Array, is a large radio telescope consisting of approximately 100 soccer-field sized antenna stations spread over a region of 400 km in diameter. It will operate at frequencies from ∼ 10 to 240 MHz, with a resolution at 240 MHz of better than an arcsecond. Its superb sensitivity will allow for studies of a broad range of astrophysical topics, including reionisation, tra...
متن کاملSpatial filtering of interfering signals at the 3 initial Low Frequency Array ( LOFAR ) phased 4 array test station
10 [1] The Low Frequency Array (LOFAR) is a radio telescope currently being designed. Its 11 targeted observational frequency window lies in the range of 10–250 MHz. In frequency 12 bands in which there is interference, the sensitivity of LOFAR can be enhanced by 13 interference mitigation techniques. In this paper we demonstrate spatial filtering 14 capabilities at the LOFAR initial test stati...
متن کاملPassive Radar and the Low Frequency Array
The proposed Low Frequency Array will be a powerful new radio telescope operating in the 15 to 240 MHz range. LOFAR will be a fully digital instrument with tens of thousands of antennas and receivers. In the currently proposed configuration LOFAR will also be capable of operating as a high performance passive radar system using FM radio stations as signals of opportunity. In this mode of operat...
متن کاملThe Lockman Hole project: LOFAR observations and spectral index properties of low-frequency radio sources
TheLockmanHole is awell-studied extragalactic fieldwith extensivemulti-band ancillary data covering a wide range in frequency, essential for characterizing the physical and evolutionary properties of the various source populations detected in deep radio fields (mainly star-forming galaxies and AGNs). In this paper, we present new 150-MHz observations carried out with the LOw-Frequency ARray (LO...
متن کاملLOFAR/H-ATLAS: A deep low-frequency survey of the Herschel-ATLAS North Galactic Pole field
We present LOFAR High-Band Array (HBA) observations of the Herschel-ATLAS North Galactic Pole survey area. The survey we have carried out, consisting of four pointings covering around 142 square degrees of sky in the frequency range 126–173 MHz, does not provide uniform noise coverage but otherwise is representative of the quality of data to be expected in the planned LOFAR wide-area surveys, a...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2013
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201220873