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Table A.1.

Overview of the MATISSE observations of T CrA. τ0 is the atmospheric coherence time. LDD is the estimated angular diameter of the calibrator from Bourgés et al. (2014).

Target Calibrator Gradea
Date and time Seeing τ0 Stations Array Name LDD Time
(UTC) (″) (ms) (mas) (UTC)

2023-05-10T10:14b 0.5 7.2 U1-U2-U3-U4 UTs 29 Sgr 2.2 09:54
2024-05-14T07:29c 0.7 4.0 A0-G2-J2-J3 medium – large HD 184996 2.7 06:52 C
2024-06-02T04:30d 0.6 6.4 U1-U2-U3-U4 UTs HD 181925 2.3 04:03 A
2024-07-01T02:24 0.4 6.7 A0-G1-J2-K0 large bet CrA 2.5 02:50 A
2024-08-10T04:24e 1.0 4.2 K0-G1-D0-J3 large – medium
2024-08-12T03:43f 1.2 5.4 A0-B5-D0-J3 medium – extended bet CrA 2.5 04:16 C

Notes.(a)The grade, given by the night astronomer in service mode (SM) runs, is a data quality indicator. ’A’ is the best grade, ’B’ means acceptable, and ’C’ indicates that the data were recorded in conditions outside of the requested observing constraints. (b)No grade, as this observation was in visitor mode. The data quality is good. Only non-chopped data were recorded, and thus this data set does not contain N-band single-dish flux data. (c)Calibrator is at significantly different airmass. (d) N-band single-dish spectrum could not be processed because of frame flagging issues during chopping. (e)Observation was aborted because of a technical issue. fSeeing was outside of the requested constraints, hence the grade C.

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