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Table 1

SPHERE observations of RX J1615.

Date Instrument Mode Coronagraph Fixlter λ0 (μm) FWHM1 (nm) DIT (s) ttot (min) Seeing (′′) SR2(%) FWHM3 (mas)

12-05-2015 IRDIS IRDIFS ALC_YJH_S H2H3 1.59 & 1.67 53 & 55 64 136.5 0.65 6570 44.5 & 46.6
12-05-2015 IFS IRDIFS ALC_YJH_S YJ 0.961.34 55.1 64 136.5 0.65 4565 30.036.1
15-05-2015 IRDIS IRDIFS ALC_YJH_S H2H3 1.59 & 1.67 53 & 55 64 68.3 0.65 6570 44.5 & 46.6
15-05-2015 IFS IRDIFS ALC_YJH_S YJ 0.961.34 55.1 64 68.3 0.65 4565 30.036.1
06-06-2015 IRDIS DPI ALC_YJH_S J 1.26 197 64 76.8 1.3 3035 42.5
09-06-2015 ZIMPOL P2 R 0.626 149 120 96 1.0 < 3 95.5

Notes.

(1)

Full width at half maximum (FWHM) of the filter transmission. For the IFS, the FWHM is given per spectral channel.

(2)

Strehl ratios (SRs) are measured using the unsaturated point spread functions (PSFs) at the observing wavelength (Girard et al., in prep.). For the low level of AO correction obtained for ZIMPOL, the FWHM is the appropriate image quality metric.

(3)

FWHM of the PSF.

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