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http://hdl.handle.net/20.500.12386/27968
Titolo: | GIANO, the high resolution IR spectrograph of the TNG: geometry of the echellogram and strategies for the 2D reduction of the spectra | Autori: | OLIVA, Ernesto SANNA, Nicoletta RAINER, Monica MASSI, Fabrizio TOZZI, Andrea ORIGLIA, Livia |
Data pubblicazione: | 2018 | Titolo del volume in cui è pubblicato il poster: | Ground-based and Airborne Instrumentation for Astronomy VII | Curatore/i del volume in cui è pubblicato il contributo: | Evans, Christopher J.; Simard, Luc; Takami, Hideki | Serie: | PROCEEDINGS OF SPIE | Numero: | 10702 | Da pagina:: | 1070274 | Abstract: | GIANO is the IR high resolution spectrograph of the TNG. It covers the 950-2450 nm wavelengths range in a single shot at a resolving power of R=50,000. This document describes the first fundamental steps of the data reduction, namely eliminating the curvature of the traces and the tilt of the slit images. These effects can be accurately modeled and corrected using a physical model of the instrument. We find that the curvature and tilt parameters did not vary during the whole lifetime of the instrument. In particular, they were not affected by thermal cycles or by the works performed to mount the spectrometer on its new interface. A similar ab-initio modeling is also applied to the wavelength calibration that can be accurately (0.03 pixel r.m.s.) defined using a minimum number of parameters to fit. This approach is particularly useful when using a calibration source with an irregular wavelengths coverage; e.g. for the U-Ne lamp that has only few lines in the 2000 nm - 2300 nm wavelengths range. | Titolo del convegno: | Ground-based and Airborne Instrumentation for Astronomy VII | Luogo del convegno: | Austin, Texas, United States | Periodo del convegno: | 10-15 June, 2018 | URI: | http://hdl.handle.net/20.500.12386/27968 | URL: | https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10702/2309927/GIANO-the-high-resolution-IR-spectrograph-of-the-TNG/10.1117/12.2309927.full | ISSN: | 0277-786X | ISBN: | 9781510619586 | DOI: | 10.1117/12.2309927 | Bibcode ADS: | 2018SPIE10702E..74O | Fulltext: | open |
È visualizzato nelle collezioni: | 3.01 Contributi in Atti di convegno |
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