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Table 1.

Central wavelength (λc), bandwidth (Δλ), and pixel scale for the SPHERE/IRDIS broadband filters that are available in FW1.

Filter λc (nm) Δλ (nm) Pixel scale (mas pix−1)
BB_Y 1043 140 12.283 ± 0.009 (a)
BB_J 1245 240 12.263 ± 0.009
BB_H 1625 290 12.251 ± 0.009
BB_Ks 2182 300 12.265 ± 0.009

Notes. The wavelength and bandwidth are described on the ESO website, and the pixel scales come from Maire et al. (2016, 2018). The broadband filters are listed here as BB_X, similar to ESO Observing Blocks (OBs), but they are frequently listed as B_X (on the ESO website and in the headers of FITS files under the keyword INS1.FILT.NAME), and as X-band in the main text.


The pixel scale for BB_Y has not been calibrated. We therefore adopted the value for the Y2 filter from Maire et al. (2016).

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