Non-thermal emission in galaxy groups at extremely low frequency: The case of A1213

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Table 1.

Integrated flux density and spectral indices of 4C 29.41 at 54, 144 and 380 MHz.

	S_54 MHz	S_144 MHz	S_380 MHz	$α_{54 MHz}^{144 MHz}$ $\alpha_{54\,\rm MHz}^{144\,\rm MHz}$	$α_{144 MHz}^{380 MHz}$ $\alpha_{144\,\rm MHz}^{380\,\rm MHz}$
	[Jy]	[Jy]	[Jy]
No uv-cut	15.5 ± 1.6	6.6 ± 0.7	3.8 ± 0.2	−0.87 ± 0.15	−0.57 ± 0.12
uv-cut	13.0 ± 1.3	6.4 ± 0.7	3.6 ± 0.2	−0.72 ± 0.15	−0.59 ± 0.13

Notes. The first three columns show the 54, 144 and 380 MHz integrated flux density of 4C 29.41, without and with applying a uv-cut. The last two columns show the corresponding spectral indices for both cases.

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