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Proceedings Paper

GO-CART: the GOHSS Calibration and Reduction Tool
Author(s): Gianluca Li Causi; Massimo De Luca; Fabrizio Vitali; Dario Lorenzetti
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Paper Abstract

The raw images coming from infrared multi-echelle fiber spectrographs are quite complex to be processed, extracted and calibrated. Available procedures are in general not exhaustive or assume high knowledge of command line environments. For the instrument GOHSS, a fiber-fed high resolution NIR spectrograph to be mounted at the Italian National Telescope TNG, we have, therefore, developed GO-CART (GOhss Calibration and Reduction Tool), a tool which automatically performs the whole stage from the assessment of the master instrument calibrations up to the final sky subtracted scientific spectra, by following predefined or user written pipelines, in which an error propagation analysis is envisaged at each step of the process. GO-CART joins together the powerful graphical and imaging capabilities of IDL with the worldwide acknowledged performances of the IRAF spectra extraction packages within an easy-to-use environment. It is fully configurable to be used with different instruments and can work on any platform on which IDL and IRAF can run. A smart data organization and proper file naming rules allow for a convenient management of any final or intermediate result. GO-CART also provides specific capabilities to model and subtract scattered light from highly packed echelle images and a custom optimal matching algorithm to perform residual-free OH subtraction.

Paper Details

Date Published: 15 September 2004
PDF: 12 pages
Proc. SPIE 5496, Advanced Software, Control, and Communication Systems for Astronomy, (15 September 2004); doi: 10.1117/12.549771
Show Author Affiliations
Gianluca Li Causi, INAF, Osservatorio Astronomico di Roma (Italy)
Massimo De Luca, INAF, Osservatorio Astronomico di Roma (Italy)
Fabrizio Vitali, INAF, Osservatorio Astronomico di Roma (Italy)
Dario Lorenzetti, INAF, Osservatorio Astronomico di Roma (Italy)


Published in SPIE Proceedings Vol. 5496:
Advanced Software, Control, and Communication Systems for Astronomy
Hilton Lewis; Gianni Raffi, Editor(s)

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