EDP Sciences
Free access
Volume 407, Number 3, September I 2003
Page(s) 1157 - 1164
Section Physical and chemical processes
DOI http://dx.doi.org/10.1051/0004-6361:20030885

A&A 407, 1157-1164 (2003)
DOI: 10.1051/0004-6361:20030885

A flux-calibrated, high-resolution atlas of optical sky emission from UVES

R. W. Hanuschik

European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching, Germany
(Received 18 April 2003 / Accepted 19 May 2003)

This paper presents a flux-calibrated, high-resolution, high-SNR atlas of optical and near-IR sky emission. It provides a complete template of the high-resolution night-sky emission spectrum with the deepest exposures ever obtained from the ground. The data have been acquired by UVES, ESO's echelle spectrograph at the 8.2-m UT2 telescope of the Very Large Telescope (VLT). Raw data stacks with up to 16 hours of integration time have been combined. The spectrum covers the range 3140-10 430 Å at a resolving power of about 45 000. A total of 2810 sky emission lines have been measured. This high-resolution spectrum is intended to be used for the identification of previously unknown faint sky lines, for simulations of ground based observations where the sky background is important, as a template for checks on the accuracy and stability of the wavelength scale, and as a reference for the reduction of spectra of faint objects.

Key words: line: identification -- atomic data -- atmospheric effects -- atlases -- techniques: spectroscopic

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