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Table B.3

LOFAR sensitivities.

Sensitivity
Freq. λ Superterp NL Core Full NL Full EU
(MHz) (m) (mJy) (mJy) (mJy) (mJy)

15 20.0 ... ... ... ...
30 10.0 36 9.0 5.7 3.8
45 6.67 29 7.4 4.7 3.1
60 5.00 25 6.2 3.9 2.6
75 4.00 44 10.8 6.8 4.5
120 2.50 1.5 0.38 0.30 0.20
150 2.00 1.3 0.31 0.24 0.16
180 1.67 1.5 0.38 0.30 0.20
200 1.50 (2.5) (0.62) (0.48) (0.32)
210 1.43 (2.5) (0.62) (0.48) (0.32)
240 1.25 (5.6) (1.4) (1.1) (0.73)

Notes.The quoted sensitivities are for image noise calculated assuming 8 h of integration and an effective bandwidth of 3.66 MHz (20 subbands). The sensitivities are based on the zenith SEFD’s derived from 3C 295 in the Galactic halo as presented in Fig. 22. These values assume a factor of 1.3 loss in sensitivity due to time-variable station projection losses for a declination of 30 degrees, as well as a factor 1.5 to take into account losses for “robust” weighting of the visibilities, as compared to natural weighting. Values for 15 MHz have not yet been determined awaiting a good station calibration. Similarly values at 200, 210, and 240 MHz should be viewed as preliminary and are expected to improve as the station calibration is improved. The procedure for determining these values along with associated caveats are discussed in more detail in Sect. 12.6.

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