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Table 1

Journal of our VLTI/MIDI observations.

Date of Universal Object N-band flux Proj. Baseline Interferometric Photometric
observation time [Jy] [m] [deg] frames frames

U3-U4 (high sensitivity/prism)
E1

01-01-2005 01:42–01:54 HD 37160a,b 6.5 60.4 112.5 12000 × 16 ms 2 × 4000 × 16 ms
01-01-2005 02:41–02:48 DR Tau 61.0 106.1 8000 × 12 ms 2 × 1500 × 12 ms
01-01-2005 02:51–03:00 DR Tau 60.4 105.6 8000 × 12 ms 2 × 4000 × 12 ms
01-01-2005 03:19–03:26 HD 31421 9.4 59.3 105.7 8000 × 12 ms 2 × 1500 × 12 ms
01-01-2005 03:59–04:07 HD 31421 9.4 55.2 104.4 8000 × 12 ms 2 × 1500 × 12 ms
01-01-2005 05:24–05:31 HD 49161 7.2 58.7 107.2 8000 × 12 ms 2 × 1500 × 12 ms

U2-U4 (high sensitivity/prism)
E2

20-10-2013 07:10–07:54 HD 25604 5.1 89.4 82.3 8000 × 18 ms 2 × 4000 × 18 ms
20-10-2013 07:45–07:52 HD 37160a 6.5 86.7 84.2 8000 × 18 ms 2 × 4000 × 18 ms
20-10-2013 08:01–08:08 HD 31421 9.4 89.4 82.1 8000 × 18 ms 2 × 2000 × 18 ms
20-10-2013 08:16–08:24 DR Tau 89.2 80.4 8000 × 18 ms 2 × 4000 × 18 ms
20-10-2013 08:33–08:41 HD 69142 5.7 82.0 55.5 8000 × 18 ms 2 × 4000 × 18 ms

U3-U4 (high sensitivity/prism)
E3

20-12-2013 01:02–01:08 HD 31421 9.4 57.2 117.9 8000 × 18 ms 2 × 2000 × 18 ms
20-12-2013 01:30–01:37 DR Tau 60.6 115.2 8000 × 18 ms 2 × 4000 × 18 ms
20-12-2013 01:54–02:03 HD 33554 7.7c 60.4 115.0 8000 × 18 ms 2 × 6000 × 18 ms
20-12-2013 02:55–03:03 HD 25604b 5.1 60.1 104.3 8000 × 18 ms 2 × 4000 × 18 ms
20-12-2013 03:41–03:48 HD 37160a 6.5 62.4 108.9 8000 × 18 ms 2 × 4000 × 18 ms

Notes.The length and position angle of the projected baselines have been determined from the fringe tracking sequence.

(a)

Spectrophotometric calibrator;

(b)

peculiar instrumental visibility;

(c)

N-band flux taken from CalVin.

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