Shadows cast on the transition disk of HD 135344B - Multiwavelength VLT/SPHERE polarimetric differential imaging

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Volume 595 (November 2016)

A&A, 595 (2016) A113

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Table 2

Summary of observations.

		Integration time							Observing conditions

Instrument & Filter	Date	DIT^a [s]		NDIT^a		NINT^a		Total^a [s]	⟨Airmass⟩^b	⟨Seeing⟩^c

IRDIS Y	30 Mar. 2015	0.84	×	30	×	5	=	126	1.03	0.′′92 (0.′′07)
IRDIS Y	30 Mar. 2015	0.84	×	15	×	2	=	25	1.03	0.′′87 (0.′′07)
ZIMPOL R	31 Mar. 2015	10	×	4	×	24	=	960	1.05	0.′′69 (0.′′04)
ZIMPOL I	31 Mar. 2015	10	×	4	×	24	=	960	1.05	0.′′69 (0.′′04)
ZIMPOL R (ND)^d	31 Mar. 2015	10	×	4	×	1	=	40	1.10	0.′′75 (0.′′03)
ZIMPOL I (ND)^d	31 Mar. 2015	10	×	4	×	1	=	40	1.10	0.′′75 (0.′′03)
IRDIS J	02 May 2015	32	×	3	×	12	=	1152	1.22	0.′′69 (0.′′07)
IRDIS J (ND)^d	02 May 2015	0.84	×	2	×	2	=	3	1.25	0.′′69 (0.′′04)

Notes.

^(a)

The total integration time per half-wave plate (HWP) position is given by the multiplication of the detector integration time (DIT), the number of detector integrations (NDIT), and the number of NDIT summed over all dither positions (NINT).

^(b)

Average airmass.

^(c)

Average differential image motion monitor (DIMM) seeing in the optical with the standard deviation in parenthesis.

^(d)

A neutral density (ND) filter with a ~10^-1 transmissivity was used.

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