Calibration issues in Δα/α

Details Calibration issues in Δα/α Calibration issues in Δα/α

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010hia....15..330c&link_type=abstract

Highlights of Astronomy, Volume 15, p. 330-330

Astronomy and Astrophysics

Astronomy

Scientific paper

Laser Comb Wavelength calibration shows ThAr one locally unreliable with deviations up to 100 m s-1 (or Δα/α ≈ 7 · 10-6 for a Fe ii-Mg ii pair) while delivering an overall 1 m s-1 accuracy. Comparison of line shifts of the 5 Fe ii lines with identical sensitivity to Δα/α offers a clean way to test local wavelength calibration errors of whatever origin.

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