Reaching thermal noise at ultra-low radio frequencies - Toothbrush radio relic downstream of the shock front

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Table 1.

Observation logs.

Calibrator	3C147
Target	RX J0603.3+4214 (Toothbrush)
Observing time	2019-04-17, 13:00 − 21:00
Time resolution^(a)	1 s → 4 s
Frequency range	39–78 MHz
Frequency resolution ^(a)^(b)	64 ch/SB → 4 ch/SB
System	LOFAR LBA_OUTER
Correlations	Full Stokes

Notes.

^(a)

Before and after initial averaging.

^(b)

SubBand (SB) bandwidth: 0.192 MHz.

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