Journal
ASTRONOMY & ASTROPHYSICS
Volume 558, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201322282
Keywords
methods: data analysis; techniques: imaging spectroscopy; instrumentation: spectrographs; infrared: general
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Funding
- Science and Technology Facilities Council [ST/I001573/1, ST/J003034/1, PP/E000207/1, ST/K001175/1] Funding Source: researchfish
- STFC [ST/K001175/1, ST/I001573/1, ST/J003034/1, PP/E000207/1] Funding Source: UKRI
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The K-band Multi Object Spectrograph (KMOS) is a multi-object near-infrared integral field spectrometer with 24 deployable cryogenic pick-off arms. Inevitably, data processing is a complex task that requires careful calibration and quality control. In this paper we describe all the steps involved in producing science-quality data products from the raw observations. In particular, we focus on the following issues: (i) the calibration scheme which produces maps of the spatial and spectral locations of all illuminated pixels on the detectors; (ii) our concept of minimising the number of interpolations, to the limiting case of a single reconstruction that simultaneously uses raw data from multiple exposures; (iii) a comparison of the various interpolation methods implemented, and an assessment of the performance of true 3D interpolation schemes; (iv) the way in which instrumental flexure is measured and compensated. We finish by presenting some examples of data processed using the pipeline.
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