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Table 1

Log of ALMA observations used in this paper.

Object Date Antennas Min. baseline Max. baseline Time on source Bandpass calibrator Phase calibrator Flux calibrator
LkCa 15 18.11.2018 45 15 m 1397 m 31 min J0510+1800 J0426+2327 J0510+1800
LkCa 15 13.07.2019 40 111 m 12644 m 37 min J0510+1800 J0431+2037 J0510+1800
LkCa 15 19.07.2019 43 96 m 8547 m 37 min J0510+1800 J0431+2037 J0510+1800

J1610 03.09.2019 46 38 m 3143 m 19 min J1517–2422 J1551–1755 J1517–2422
J1610 17.07.2019 43 92 m 8547 m 43 min J1427–4206 J1551–1755 J1427–4206
J1610 18.07.2019 46 92 m 8547 m 19 min J1427–4206 J1551–1755 J1427–4206

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