Table 1
Setup of the LOFAR LBA beam-formed observations.
| Parameter | Value | Units |
|---|---|---|
| Array setup | Core | |
| Number of stationsa | 24 | |
| Lower frequency | 14.7 | MHz |
| Upper frequency | 62.4 | MHz |
| Channel bandwidth (b) | 3.05 | kHz |
| Number of subbands | 244 | |
| Channels per subband | 64 | |
| Time resolution (τr) | 10.5 | msec |
| Angular resolutionb | 9.2 | arcmin |
| Raw sensitivityc (ΔS) | 208 | Jy |
| Polarizations | IQUV | |
Notes.
(a) The data streams from all stations are combined during the observations. Subsequent data processing deals with this combined data stream.
(b) The angular resolution was calculated at 45 MHz (van Haarlem et al. 2013).
(c) The theoretical (thermal noise) sensitivity (ΔS) was calculated using the sensitivity equation 
, where Ssys is the system equivalent flux density (SEFD) and equal to 40 kJy (obtained from LOFAR calibration data; van Haarlem et al. 2013),
N is the number of stations used, npol is the number of polarizations (2), b is the channel bandwidth, and τr
is the time resolution. ΔS
was calculated with the values given in this table.
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