Slitless spectrophotometry with forward modelling: Principles and application to measuring atmospheric transmission

Open Access

Fig. 23

Multispectra fit of a CTIO photometric night using the blazed grating with 300 lines mm⁻¹. Top: D_n data spectra binned in 3 nm intervals, indexed vertically by their index n and with a coloured amplitude. Masked regions are shown in grey. Middle: best-fitting spectrum models indexed vertically by their index n. Bottom: residual map.

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