A first glimpse at the MeerKAT DEEP2 field at S-band
We present the first widefield extragalactic continuum catalogue with the MeerKAT S-band (2.5 GHz), of the radio-selected DEEP2 field. The combined image over the S1 (1.96 - 2.84 GHz) and S4 (2.62 - 3.50 GHz) sub-bands has an angular resolution of 6.8''$\times$3.6'' (4.0'...
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Zusammenfassung: | We present the first widefield extragalactic continuum catalogue with the
MeerKAT S-band (2.5 GHz), of the radio-selected DEEP2 field. The combined image
over the S1 (1.96 - 2.84 GHz) and S4 (2.62 - 3.50 GHz) sub-bands has an angular
resolution of 6.8''$\times$3.6'' (4.0''$\times$2.4'') at a robust weighting of
$R = 0.3$ ($R=-0.5$) and a sensitivity of 4.7 (7.5) $\mu$Jy beam$^{-1}$ with an
on-source integration time of 70 minutes and a minimum of 52 of the 64
antennas, for respective observations. We present the differential source
counts for this field, as well as a morphological comparison of resolved
sources between S-band and archival MeerKAT L-band images. We find consistent
source counts with the literature and provide spectral indices fitted over a
combined frequency range of 1.8 GHz. These observations provide an important
first demonstration of the capabilities of MeerKAT S-band imaging with
relatively short integration times, as well as a comparison with existing
S-band surveys, highlighting the rich scientific potential with future MeerKAT
S-band surveys. |
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DOI: | 10.48550/arxiv.2412.09314 |