DR Tauri: Temporal variability of the brightness distribution in the potential planet-forming region

R. Brunngräber; S. Wolf; Th. Ratzka; F. Ober

doi:10.1051/0004-6361/201526691

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Volume 585 (January 2016)

A&A, 585 (2016) A100

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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 37160^a^,^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 37160^a	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	7.7^c	60.4	115.0	8000 × 18 ms	2 × 6000 × 18 ms
20-12-2013	02:55–03:03	HD 25604^b	5.1	60.1	104.3	8000 × 18 ms	2 × 4000 × 18 ms
20-12-2013	03:41–03:48	HD 37160^a	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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