:: LOFAR - Astronomy

LOFAR specifications [following 2007 descope]

Frequency Range	Low Band	30-80 MHz^(a)
	High Band	110-240 MHz
Number of Antenna’s	Low Band	4225
	High Band (4x4 tiles)	2500
Polarization		Full Stokes
Configuration	Core	2600 antenna’s (both low & high bands) min. 18 stations baselines approx. 100m-2 km
	Extended Array	2600 antenna’s (both low & high bands) min. 18 stations baselines up to 100 km(a)
	European Stations	1500 antenna’s (both low & high bands) min. 8 stations baselines up to 1000 km
Digitized Bandwidth	In the following ranges 10-90 MHz, 110-190 MHz or 210-290 MHz	100 MHz bandwidth
	In 170-230 MHz range	80 MHz bandwidth
Expected Processing Capacity	Full Array Imaging Mode(Sum of Bandwidth of all Beams)	32 MHz

^(a) All numbers refer to Initial Array – extension to lower frequency (10-30 MHz) and longer baselines ~400 km are possible future extensions

Frequency dependent Array Performance (Initial array)

Frequency	Point Source Sensitivity^(b)		Effective Collecting Area		Beam Size
	Core	Extended Array	Core	Extended Array	Core	Extended Array
30 MHz	to follow (c)	~20 mJy	2.5x10⁴ m²	5.0x10⁴ m²	14’	20.6”
75 MHz	to follow (c)	11.2 mJy	4.6x10³ m²	9.3x10³ m²	5.5’	8.3”
120 MHz	to follow (c)	0.4 mJy	2.2x10⁴ m²	4.3x10⁴ m²	3.4’	5.2”
200 MHz	to follow (c)	0.4 mJy	1.0x10⁴ m²	2.0x10⁴ m²	1.7’	3.2”

^(b) Sensitivity quoted for 1 hour integration time, 2 polarizations and 4 MHz bandwidth

^(c) Numbers to follow shortly - temporarily removed to prevent confusion

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