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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