High-contrast imaging of ϵ Eridani with ground-based instruments

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Volume 595 (November 2016)

A&A, 595 (2016) A79

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Table 3

Observing properties of ϵ Eri.

Properties\Instrument	HiCIAO	NICI	NACO	NACO

Filter	CH₄S + CH₄L	CH₄S + CH₄L(4%)	Lp	NB4.05
Obs. mode	2ch SDI+ADI	SDI+ADI	ADI	DI
D_mask^a (arcsec)	0.4	0.32	0.7	no
N_frame(N_coadd)	281(3)	11, 13(9)	97, 98(300)	38+38(61)
t_frame (second)	4.2	2.28	0.15	1.0
t_total^b (minute)	53.2	8.2	146.3	77.3
θ_rot^c (degree)	60.6	39.0, 43.8	66.8, 67.8	18.8, 22.9
FWHM^d (mas)	55.6	103.4	99.5	115.2
Date (yyyy-mm-dd)	2011-09-05	2011-09-13, 10-16	2012-11-21, 27	2007-12-17, 28
PI	Motohide Tamura	Michael Liu	Sascha P. Quanz	Markus Janson
Program ID	SEEDS	NICI Campaign	090.C-0777(A)	080.C-0598(A)

Notes.

^(a)

Diameter of occulting mask is provided if a coronagraphic mask was used for the observation.

^(b)

Total integration time (t_total) is calculated from exposure time of a frame (t_frame) multiplied by the number of frames (N_frame) and the number of coadds (N_coadd) after removal of bad frames.

^(c)

Rotation angle while science frames were taken.

^(d)

FWHM of the PSF is measured from unsaturated frames taken through an ND filter. For the case of NACO/Lp, average FWHM of photometric standard stars are presented.

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