Purpose of the AtlasThis page provides an atlas of UVES Thorium-Argon spectra as obtained in the UVES standard settings.
The atlas can be used to identify individual Thorium-Argon lines to generate wavelength calibration solutions.
In addition, the FITS table with the wavelengths of the Thorium-Argon lines is provided.
Content of the Atlas
- 2D images of the Thorium-Argon frames with
- the instrument setup identified on the top,
- the running number of the (extracted) orders to the left,
- the absolute order numbers to the right.
- plots of all extracted 1D orders with
- the extracted order numbers, the absolute order numbers, and the instrument setups identified on the top,
- the extracted Thorium-Argon spectra in x-pixel coordinates
- the lines identified by their wavelength (in blue)
- resolution plots as derived from the extracted Thorium-Argon spectra
- The Thorium-Argon exposures have been taken with the following instrument settings:
- slit width: 0.5 arcsec
- exposure time: 15 s
- CCD setup: readout-speed 225kHz, low gain, 1x1 binning
- The CCD frames have been extracted and flipped/transposed with theSPLIT/UVES tool available in the MIDAS context uves:
- the overscan regions are removed
- the orders are oriented to have a positive slope
- wavelengths are increasing from bottom to top
Download sectionThorium-Argon linetable in FITS-table and ASCII formats.
This linetable contains in computer readable form all Thorium-Argon lines which are identified in the atlas.
The Thorium linelist is based onPalmer, B. A., & Engleman, R. Jr. 1983, Atlas of the Thorium spectrum,Sinoradzky H. (ed.), Los Alamos National Laboratory,
and lines are selected according to R=100000 spectroscopy based onde Cuyper, J.-P., & Hensberge, H. 1998, A&AS, 128, 409.
For the Argon lines, the reference isNorlén, G. 1973, Phys. Scripta, 8, 249.
The table has been edited to provide blend-free lines for a resolving power of R=100000. In the near-IR, lines have been added to improve the dispersion solutions.