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Table 2

Radio observations.

Telescope Frequency Resolution Largest scale Flux density Rms
(MHz) (arcmin) (mJy) (mJy beam-1)
East West

GMRT 325 141′′× 89′′ 32 151 280 1.5
VLA (NVSS) 1400 45′′× 45′′ 16 48 67 0.5
Parkes 64 m 2417 10′.23 × 10′.62 ~3000b 11
Parkes 64 m (PMN) 4850 4′.9 × 4′.9 57a 367 162 11

Notes..

(a)

Although the PMN is a single dish survey, a limit on the largest scale is given by the filtering procedure applied during data reduction (Griffith & Wright 1993)

(b)

The target emission is blended with the surrounding Galactic extended emission.

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