Avoiding Bias in Measurements of Fundamental Constants from High Resolution Quasar Spectra

Recent advances in spectroscopic instrumentation and calibration methods dramatically improve the quality of quasar spectra. Supercomputer calculations show that, at high spectral resolution, procedures used some previous analyses spacetime variations fundamental constants are likely to generate spurious measurements, biased systematically towards a null result. Developments analysis also summarised prescription given for new forthcoming data.