Volume 558, October 2013
|Number of page(s)||17|
|Section||Numerical methods and codes|
|Published online||03 October 2013|
The Software Package for Astronomical Reductions with KMOS: SPARK
Max-Planck-Institut für extraterrestrische Physik,
Postfach 1312, 85741
2 Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, EH9 3HJ, UK
3 Universitäts-Sternwarte München, Scheinerstr. 1, 81679 München, Germany
4 European Southern Observatory, Karl-Schwarzschildstr. 2, 85748 Garching, Germany
5 Department of Physics, University of Durham, South Road, Durham, DH1 3LE, UK
Accepted: 26 August 2013
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.
Key words: methods: data analysis / techniques: imaging spectroscopy / instrumentation: spectrographs / infrared: general
© ESO, 2013
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