Data reduction and calibration accuracy of the imaging Fourier transform spectrometer SITELLE
نویسندگان
چکیده
ABSTRACT SITELLE, an imaging Fourier Transform Spectrometer, is part of the Canada–France–Hawaii instrument suite. It delivers spectral cubes covering 11 arcmin × field view with a seeing-limited spatial resolution and tunable (R ∼ 1–10 000) in selected bands visible range (350–900 nm). We present complete picture calibration accuracy obtained SITELLE processing pipeline ORBS. put particular emphasis on description our phase correction method assessment flux precision. show that absolute uncertainty to be considered between −15 per cent 5 cent. Flexure likely responsible for wavelength error gradient across view, amplitude corresponding 15 25 km s−1; measurements night-sky emission lines when science cube reduces this ∼2 s−1. The astrometric limited ∼1 arcsec by optical distortions. Considering transform spectrometers are not as widely used dispersive because its prototype first instruments their kind provide data near-UV at high over very large we took great care explaining most core concepts behind technique well exploring all practical limitations affect precision calibrations. As such, paper aims providing solid ground subsequent developments astronomy.
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2021
ISSN: ['0035-8711', '1365-8711', '1365-2966']
DOI: https://doi.org/10.1093/mnras/stab1656