Wavelength Standards for IR Spectrographs at ESO

Details Wavelength Standards for IR Spectrographs at ESO Wavelength Standards for IR Spectrographs at ESO

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008asvo.proc..155k&link_type=abstract

Astronomical Spectroscopy and Virtual Observatory, Proceedings of the EURO-VO Workshop, held at the European Space Astronomy Cen

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on our efforts to provide high accuracy wavelength calibration for scientific observations with the Cryogenic High-Resolution IR Echelle Spectrograph (CRIRES), ESO's new high resolution (R≈100,000) infrared (IR) spectrograph at the VLT. In order to provide reliable and accurate wavelength standards for CRIRES the European Southern Observatory (ESO), in collaboration with the National Institute of Standards and Technology (NIST) and the Space Telescope European Co-ordinating Facility (ST-ECF), embarked on a project to establish Th-Ar wavelength standards in the 900 nm - 5000 nm operating range of CRIRES. These calibration reference data are being used by a physical instrument model designed for the wavelength calibration in the science data reduction pipeline. With the availability of a reliable and well characterized source, wavelength calibration in the near IR will be very similar to the UV-visible region, and it will become possible to support high accuracy absolute wavelength calibration without having to rely on atmospheric features. In order to facilitate the use of Th-Ar lamps at other facilities we will make all relevant information available in a form compliant with Virtual Observatory standards. This will be one of the first comprehensive data sets resulting from laboratory atomic physics that is made accessible to the astronomical community in this manner.

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