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Table 1

Specifications of contemporary radio transient detection machines.

Parameter AARTFAAC LBA MWA LWA1 Comment

Array elements 288 inverted V antennas 128 tiles 256 wiregrid bowtie Dual polarized elements
Frequency range (MHz) 30–80 80–300 10–88
Field of view (sr) π 0.06π π FWHM of beam
Total Effective area (m2) 2617a 2752b 1393c
Tsys(ν-2.55 K) 3600 350 2100
Angular resolution (arcmin) 60 3 120
Spectral resolution (kHz) 16 40 75
Processed Bandwidth (MHz) 13 30.72 0.075 LWA: Narrow band Imaging
Temporal resolution (s) 1 8 5
Transient detection FoMd(m2 sr K-1) 2.28 1.48 2.08 Per unit BW and unit time

Notes. The parameters are estimated at the highest sensitivity of each instrument, viz. 60 MHz for AARTFAAC, 150 MHz for the MWA, and 74 MHz for the LWA, which continuously observes only in its “Narrow band” mode. The zenith pointing Aeff is quoted. The Tsys (assumed to be sky noise dominated) is also evaluated at the same frequencies from Bregman (2000).

(d)

See Sect. 2 for FoM definition.

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