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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